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Columns in Blazor Gantt Chart component

08 Apr 2021 / 32 minutes to read

The column displays information from a bound data source, and you can edit the values of column to update the task details through Tree Grid. The operations such as sorting, filtering, and searching can be performed based on column definitions. To display a Gantt Chart column, the Field property should be mapped from the data source to the column.

If the column Field is not specified in the data source, the column values will be empty.

The TreeColumnIndex property is used to define the expander column in the Gantt Chart component to expand and collapse the child rows.

Defining Columns

Using the GanttColumns property, you can define the columns in Gantt Chart. If the columns are not defined, then the default columns will be rendered based on the mapped data source fields in the GanttTaskFields property. Refer to the following code example for defining the columns in Gantt Chart along with their widths.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
            Duration="Duration" Progress="Progress" Child="SubTasks">
    </GanttTaskFields>
    <GanttColumns>
        <GanttColumn Field="TaskId" Width="150"></GanttColumn>
        <GanttColumn Field="TaskName" HeaderText="Job Name" Width="250"></GanttColumn>
    </GanttColumns>
</SfGantt>

@code{
    public List<TaskData> TaskCollection { get; set; }
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List <TaskData> GetTaskCollection() {
    List <TaskData> Tasks = new List <TaskData> () {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "4",
                    Progress = 40,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

    return Tasks;
}
}

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Format

To format the cell values based on a specific culture, use the GanttColumn.Format property. The Gantt Chart component uses the Internationalization library to format number and date values.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
             Duration="Duration" Progress="Progress" Child="SubTasks">
    </GanttTaskFields>
    <GanttColumns>
        <GanttColumn Field="TaskId" Width="150"></GanttColumn>
        <GanttColumn Field="Progress" Format="@NumberFormat" Width="250"></GanttColumn>
    </GanttColumns>
</SfGantt>

@code{
    public List<TaskData> TaskCollection { get; set; }
    public string NumberFormat = "C";
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List<TaskData> GetTaskCollection()
    {
        List<TaskData> Tasks = new List<TaskData>() {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "4",
                    Progress = 40,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

        return Tasks;
    }
}

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By default, the number and date values are formatted in en-US culture.

Number formatting

The number or integer values can be formatted using the following format strings.

Format	Description
N	Denotes numeric type.
C	Denotes currency type.
P	Denotes percentage type

Date formatting

You can format date values either using the built-in date format string or a custom format string.

For the built-in date format, you can specify the GanttColumn.Format property as string (example: yMd).

You can also use the custom format string to format the date values. Some of the custom formats and the formatted date values are given in the following table.

Format	Formatted value
{ type:‘date’, format:‘dd/MM/yyyy’ }	04/07/2019
{ type:‘date’, format:‘dd.MM.yyyy’ }	04.07.2019
{ type:‘date’, skeleton:‘short’ }	7/4/19
{ type: ‘dateTime’, format: ‘dd/MM/yyyy hh:mm tt’ }	04/07/2019 12:00 AM
{ type: ‘dateTime’, format: ‘MM/dd/yyyy hh:mm:ss tt’ }	07/04/2019 12:00:00 AM

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
         Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" Width="150"></GanttColumn>
    <GanttColumn Field="TaskName" HeaderText="Job Name" Width="250"></GanttColumn>
    <GanttColumn Field="StartDate" Format="@DateFormat"></GanttColumn>
    <GanttColumn Field="Duration"></GanttColumn>
</GanttColumns>
</SfGantt>

@code{
public List<TaskData> TaskCollection { get; set; }
public string DateFormat = "MM/dd/yyyy";
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

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Reordering

The column reordering can be done by dragging a column header from one index to another index within the Tree Grid. To enable reordering, set the AllowReordering property to true.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowReordering="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
         Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
</SfGantt>

@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

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You can disable the reordering of a particular column by setting the GanttColumn.AllowReordering property to false.

Reorder Multiple Columns

Multiple columns can be reordered at a time by using the ReorderColumns method.

@using Syncfusion.Blazor.Gantt
<button @onclick="ReorderColumn">Reorder TaskName and StartDate to last</button>
<SfGantt @ref="Gantt" DataSource="@TaskCollection" Height="450px" Width="700px" AllowReordering="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
         Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" HeaderText="Task Id" Width="150"></GanttColumn>
    <GanttColumn Field="TaskName" HeaderText="Task Name"></GanttColumn>
    <GanttColumn Field="StartDate" HeaderText="Start Date"></GanttColumn>
    <GanttColumn Field="Duration" HeaderText="Duration"></GanttColumn>
    <GanttColumn Field="Progress" HeaderText="Progress"></GanttColumn>
</GanttColumns>
<GanttSplitterSettings Position="100%"></GanttSplitterSettings>
</SfGantt>

@code{
public SfGantt<TaskData> Gantt;
public void ReorderColumn()
{
    this.Gantt.ReorderColumns(new List<string>(){"TaskName", "StartDate"},"Progress");
}
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

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Resizing

The column width can be resized by clicking and dragging the right edge of the column header. While dragging, the width of the column will be resized immediately. Each column can be auto resized by double-clicking the right edge of the column header to fit the width of that column based on the widest cell content. To resize the column, set the AllowResizing property to true. The following code example shows how to enable the column resize feature in the Gantt Chart component.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowResizing="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
        Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
</SfGantt>

@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

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You can disable resizing for a particular column by setting the GanttColumn.AllowResizing to false.

Defining Minimum and Maximum Column Width

The column resizing can be restricted between minimum and maximum widths by defining the GanttColumn.MinWidth and GanttColumn.MaxWidth properties.

In the following example, the minimum and maximum widths are defined for the Duration, and Task Name columns.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowResizing="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
          Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" Width="50"></GanttColumn>
    <GanttColumn Field="TaskName" Width="200" MinWidth="150" MaxWidth="250"></GanttColumn>
    <GanttColumn Field="StartDate"></GanttColumn>
    <GanttColumn Field="Duration" Width="100" MinWidth="50" MaxWidth="200"></GanttColumn>
    <GanttColumn Field="Progress"></GanttColumn>
</GanttColumns>
</SfGantt>
@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

Column Template

A column template is used to customize the column’s look. The following code example explains how to define the custom template in Gantt Chart using the Template property.

@using Syncfusion.Blazor.Gantt
@using Syncfusion.Blazor.Buttons

<SfGantt DataSource="@TaskCollection" Height="450px" Width="100%" HighlightWeekends="true" ProjectStartDate="@ProjectStart" ProjectEndDate="@ProjectEnd">
<GanttColumns>
    <GanttColumn Field="TaskId" HeaderText="Task ID" MinWidth="150" MaxWidth="250" AllowReordering="false"></GanttColumn>
    <GanttColumn Field="TaskName" HeaderText="Task Name">
        <Template>
            @{
                @if (context != null)
                {
                    <SfButton CssClass="e-bigger" Content="@((context as TaskData).TaskName)"></SfButton>
                }
            }
        </Template>
    </GanttColumn>
    <GanttColumn Field="Duration" HeaderText="Duration"></GanttColumn>
</GanttColumns>
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate" Duration="Duration" Progress="Progress" ParentID="ParentId">
</GanttTaskFields>
</SfGantt>

@code{
public DateTime ProjectStart = new DateTime(2019, 3, 25);
public DateTime ProjectEnd = new DateTime(2019, 7, 28);
public List<TaskData> TaskCollection { get; set; }

protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime? StartDate { get; set; }
    public DateTime? EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public int? ParentId { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {

    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21)
    },
    new TaskData() {
        TaskId = 2,
        TaskName = "Identify Site location",
        StartDate = new DateTime(2019, 04, 02),
        Duration = "0",
        Progress = 30,
        ParentId = 1
    },
    new TaskData() {
        TaskId = 3,
        TaskName = "Perform soil test",
        StartDate = new DateTime(2019, 04, 02),
        Duration = "4",
        Progress = 40,
        ParentId = 1
    },
    new TaskData() {
        TaskId = 4,
        TaskName = "Soil test approval",
        StartDate = new DateTime(2019, 04, 02),
        Duration = "0",
        Progress = 30,
        ParentId = 1
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21)
    },
    new TaskData() {
        TaskId = 6,
        TaskName = "Develop floor plan for estimation",
        StartDate = new DateTime(2019, 04, 04),
        Duration = "3",
        Progress = 30,
        ParentId = 5
    },
    new TaskData() {
        TaskId = 7,
        TaskName = "List materials",
        StartDate = new DateTime(2019, 04, 04),
        Duration = "3",
        Progress = 40,
        ParentId = 5
    },
    new TaskData() {
        TaskId = 8,
        TaskName = "Estimation approval",
        StartDate = new DateTime(2019, 04, 04),
        Duration = "0",
        Progress = 30,
        ParentId = 5
    }
};
    return Tasks;
}
}

Alt text

The column menu has options to integrate features like sorting, filtering, and autofit. It will show a menu with the integrated feature when users click the Multiple icon of the column. To enable the column menu, you should set the ShowColumnMenu property to true. The default items are displayed in the following table:

Item	Description
`SortAscending`	Sort the current column in ascending order.
`SortDescending`	Sort the current column in descending order.
`AutoFit`	Auto fit the current column.
`AutoFitAll`	Auto fit all columns.
`ColumnChooser`	Choose the column visibility.
`Filter`	Shows the filter menu based on column type.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowResizing="true" ShowColumnMenu="true" AllowFiltering="true" AllowSorting="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
         Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
</SfGantt>
@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

Alt text

You can disable the column menu for a particular column by setting the GanttColumn.ShowColumnMenu to false.

Responsive Columns

You can toggle the column visibility based on media queries, which are defined in the HideAtMedia. The HideAtMedia accepts valid Media Queries.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
         Duration="Duration" Progress="Progress" Child="SubTasks"></GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" Width="150" HideAtMedia="(min-width: 700px)"></GanttColumn>
    <GanttColumn Field="TaskName" HeaderText="Job Name" Width="250"></GanttColumn>
    <GanttColumn Field="StartDate"></GanttColumn>
    <GanttColumn Field="Duration" HideAtMedia="(min-width: 500px)"></GanttColumn>
</GanttColumns>
</SfGantt>
@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

Change Tree / Expander column

The tree/expander column is a column in the Gantt Chart component, that has icons to expand or collapse the parent records. You can define the tree column index in the Gantt Chart component by using the TreeColumnIndex property and the default value of this property is 0. The following code example shows how to use this property.

@using Syncfusion.Blazor.Gantt
<SfGantt DataSource="@TaskCollection" TreeColumnIndex="2" Height="450px" Width="700px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
          Duration="Duration" Progress="Progress" Child="SubTasks"></GanttTaskFields>
</SfGantt>
@code{
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}

public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List<TaskData> GetTaskCollection()
{
    List<TaskData> Tasks = new List<TaskData>() {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            }
        })
    }
};

    return Tasks;
}
}

Alt text

Show or Hide Columns dynamically

You can show or hide gantt component columns dynamically using external buttons by invoking the ShowColumns or HideColumns method.

@using Syncfusion.Blazor.Gantt
<button @onclick="show">Show columns</button>
<button @onclick="hide">Hide columns</button>
<SfGantt @ref="Gantt" DataSource="@TaskCollection" Height="450px" Width="900px">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate" Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" Width="100"></GanttColumn>
    <GanttColumn Field="TaskName" HeaderText="Job Name" Width="250"></GanttColumn>
    <GanttColumn Field="StartDate"></GanttColumn>
    <GanttColumn Field="EndDate"></GanttColumn>
    <GanttColumn Field="Duration"></GanttColumn>
    <GanttColumn Field="Progress"></GanttColumn>
</GanttColumns>
</SfGantt>

@code{
public SfGantt<TaskData> Gantt;
public List<TaskData> TaskCollection { get; set; }
public string[] ColumnList = {"TaskName", "StartDate"};
public void show() {
    this.Gantt.ShowColumns(ColumnList, "Field");
}
public void hide() {
    this.Gantt.HideColumns(ColumnList, "Field");
}
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}
public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List <TaskData> GetTaskCollection() {
List <TaskData> Tasks = new List <TaskData> () {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Progress = 30,
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Progress = 40,
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Progress = 30,
            },
        })
    }
};
return Tasks;
}
}

Controlling Gantt Column actions

You can enable or disable gantt component action for a particular column by setting the AllowFiltering, AllowSorting, AllowReordering, and AllowEditing properties.

@using Syncfusion.Blazor.Gantt
<SfGantt @ref="Gantt" DataSource="@TaskCollection" Height="450px" Width="900px" AllowSorting="true" AllowFiltering="true" AllowReordering="true">
<GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate" Duration="Duration" Progress="Progress" Child="SubTasks">
</GanttTaskFields>
<GanttColumns>
    <GanttColumn Field="TaskId" Width="100"></GanttColumn>
    <GanttColumn Field="TaskName" AllowReordering="false" Width="250"></GanttColumn>
    <GanttColumn Field="StartDate" AllowEditing="false"></GanttColumn>
    <GanttColumn Field="Duration" AllowSorting="false"></GanttColumn>
    <GanttColumn Field="Progress" AllowFiltering="false"></GanttColumn>
</GanttColumns>
<GanttEditSettings AllowEditing="true"></GanttEditSettings>
</SfGantt>

@code{
public SfGantt<TaskData> Gantt;
public List<TaskData> TaskCollection { get; set; }
protected override void OnInitialized()
{
    this.TaskCollection = GetTaskCollection();
}
public class TaskData
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public string Duration { get; set; }
    public int Progress { get; set; }
    public bool Verified { get; set; }
    public List<TaskData> SubTasks { get; set; }
}

public static List <TaskData> GetTaskCollection() {
List <TaskData> Tasks = new List <TaskData> () {
    new TaskData() {
        TaskId = 1,
        TaskName = "Project initiation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        Verified = true,
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 2,
                TaskName = "Identify Site location",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Verified = true,
                Progress = 30,
            },
            new TaskData() {
                TaskId = 3,
                TaskName = "Perform soil test",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "4",
                Verified = false,
                Progress = 40,
            },
            new TaskData() {
                TaskId = 4,
                TaskName = "Soil test approval",
                StartDate = new DateTime(2019, 04, 02),
                Duration = "0",
                Verified = true,
                Progress = 30,
            },
        })
    },
    new TaskData() {
        TaskId = 5,
        TaskName = "Project estimation",
        StartDate = new DateTime(2019, 04, 02),
        EndDate = new DateTime(2019, 04, 21),
        Verified = false,
        SubTasks = (new List <TaskData> () {
            new TaskData() {
                TaskId = 6,
                TaskName = "Develop floor plan for estimation",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Verified = true,
                Progress = 30,
            },
            new TaskData() {
                TaskId = 7,
                TaskName = "List materials",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "3",
                Verified = false,
                Progress = 40,
            },
            new TaskData() {
                TaskId = 8,
                TaskName = "Estimation approval",
                StartDate = new DateTime(2019, 04, 04),
                Duration = "0",
                Verified = true,
                Progress = 30,
            },
        })
    }
};
return Tasks;
}
}

Column Type

Column type can be specified using the GanttColumn.Type property. It specifies the type of data the column binds.

If the GanttColumn.Format is defined for a column, the column uses GanttColumn.Type to select the appropriate format option number or date.

Gantt column supports the following types:

String
Number
Boolean
Date
DateTime

If the GanttColumn.Type is not defined, it will be determined from the first record of the DataSource. In case if the first record of the DataSource is null/blank value for a column then it is necessary to define the GanttColumn.Type for that column.

Contents

Defining Columns
Format
Number formatting
Date formatting
Reordering
Reorder Multiple Columns
Resizing
Defining Minimum and Maximum Column Width
Column Template
Column Menu
Responsive Columns
Change Tree Expander column
Show or Hide Columns dynamically
Controlling Gantt Column actions
Column Type

Contents

Defining Columns
Format
Number formatting
Date formatting
Reordering
Reorder Multiple Columns
Resizing
Defining Minimum and Maximum Column Width
Column Template
Column Menu
Responsive Columns
Change Tree Expander column
Show or Hide Columns dynamically
Controlling Gantt Column actions
Column Type

Please provide additional information

Thank you for your feedback and comments.We will rectify this as soon as possible!

Columns in Blazor Gantt Chart component

Defining Columns

Format

Number formatting

Date formatting

Reordering

Reorder Multiple Columns

Resizing

Defining Minimum and Maximum Column Width

Column Template

Column Menu

Responsive Columns

Change Tree / Expander column

Show or Hide Columns dynamically

Controlling Gantt Column actions

Column Type