Column Resizing in Blazor Gantt Chart Component
16 Aug 20236 minutes to read
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" ParentID="ParentId">
</GanttTaskFields>
</SfGantt>
@code{
private 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(2022, 04, 05), EndDate = new DateTime(2022, 04, 21), },
new TaskData() { TaskId = 2, TaskName = "Identify Site location", StartDate = new DateTime(2022, 04, 05), Duration = "0", Progress = 30, ParentId = 1 },
new TaskData() { TaskId = 3, TaskName = "Perform soil test", StartDate = new DateTime(2022, 04, 05), Duration = "4", Progress = 40, ParentId = 1 },
new TaskData() { TaskId = 4, TaskName = "Soil test approval", StartDate = new DateTime(2022, 04, 05), Duration = "0", Progress = 30, ParentId = 1 },
new TaskData() { TaskId = 5, TaskName = "Project estimation", StartDate = new DateTime(2022, 04, 06), EndDate = new DateTime(2022, 04, 21), },
new TaskData() { TaskId = 6, TaskName = "Develop floor plan for estimation", StartDate = new DateTime(2022, 04, 06), Duration = "3", Progress = 30, ParentId = 5 },
new TaskData() { TaskId = 7, TaskName = "List materials", StartDate = new DateTime(2022, 04, 06), Duration = "3", Progress = 40, ParentId = 5 },
new TaskData() { TaskId = 8, TaskName = "Estimation approval", StartDate = new DateTime(2022, 04, 06), Duration = "0", Progress = 30, ParentId = 5 }
};
return Tasks;
}
}
NOTE
You can disable resizing for a particular column by setting the
GanttColumn.AllowResizing
tofalse
.
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" ParentID="ParentId">
</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{
private 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(2022, 04, 05), EndDate = new DateTime(2022, 04, 21), },
new TaskData() { TaskId = 2, TaskName = "Identify Site location", StartDate = new DateTime(2022, 04, 05), Duration = "0", Progress = 30, ParentId = 1 },
new TaskData() { TaskId = 3, TaskName = "Perform soil test", StartDate = new DateTime(2022, 04, 05), Duration = "4", Progress = 40, ParentId = 1 },
new TaskData() { TaskId = 4, TaskName = "Soil test approval", StartDate = new DateTime(2022, 04, 05), Duration = "0", Progress = 30, ParentId = 1 },
new TaskData() { TaskId = 5, TaskName = "Project estimation", StartDate = new DateTime(2022, 04, 06), EndDate = new DateTime(2022, 04, 21), },
new TaskData() { TaskId = 6, TaskName = "Develop floor plan for estimation", StartDate = new DateTime(2022, 04, 06), Duration = "3", Progress = 30, ParentId = 5 },
new TaskData() { TaskId = 7, TaskName = "List materials", StartDate = new DateTime(2022, 04, 06), Duration = "3", Progress = 40, ParentId = 5 },
new TaskData() { TaskId = 8, TaskName = "Estimation approval", StartDate = new DateTime(2022, 04, 06), Duration = "0", Progress = 30, ParentId = 5 }
};
return Tasks;
}
}