Row Selection in Blazor Gantt Chart Component

23 Dec 202312 minutes to read

The row selection in the Gantt Chart component can be enabled or disabled using the AllowSelection property. You can get the selected row object using the GetSelectedRecordsAsync method. The following code example shows how to disable the row selection in Gantt Chart.

@using Syncfusion.Blazor.Gantt
    <SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowSelection="false">
        <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, 02), 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

Row selection is the default type of Gantt Chart selection mode.

Selecting a row on initial load

You can select a row at the time of loading by setting the index of the row to the SelectedRowIndex property. Find the following code example for details.

@using Syncfusion.Blazor.Gantt
    <SfGantt DataSource="@TaskCollection" Height="450px" Width="700px" AllowSelection="true" SelectedRowIndex="3">
        <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, 02), 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;
    }
}

Initial Selection in Blazor Gantt Chart

Selecting a row dynamically

You can select a single row dynamically using the SelectRowAsync method. Similarly, you can use the SelectRowsAsync method to dynamically select multiple rows. The following code demonstrates how to select a single or multiple rows dynamically by clicking the custom button.

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

<SfButton @onclick="SelectRow">Select Row</SfButton> 
<SfButton @onclick="SelectRows">Select Rows</SfButton>
<SfGantt @ref="Gantt" DataSource="@TaskCollection" Height="450px" Width="700px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate" Duration="Duration" Progress="Progress" ParentID="ParentId">
    </GanttTaskFields>
    <GanttSelectionSettings Mode="Syncfusion.Blazor.Grids.SelectionMode.Row" Type="Syncfusion.Blazor.Grids.SelectionType.Multiple"></GanttSelectionSettings>
</SfGantt>

@code{
    public SfGantt<TaskData> Gantt;
    public void SelectRow()
    {
        this.Gantt.SelectRowAsync(2);
    }
    public void SelectRows()
    {
        this.Gantt.SelectRowsAsync(new int[] {1,2,3});
    }
    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;
    }
}

Row Selection in Blazor Gantt Chart

Selecting Multiple Rows Dynamically in Blazor Gantt Chart

Multiple row selection

You can select multiple rows by setting the SelectionSettings.Type property to Multiple. You can select more than one row by holding down the CTRL key while selecting multiple rows. The following code example explains how to enable multiple selection in Gantt Chart.

@using Syncfusion.Blazor.Gantt
@using Syncfusion.Blazor.Grids
<SfGantt DataSource="@TaskCollection" Height="450px" Width="700px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate" Duration="Duration" Progress="Progress" ParentID="ParentId">
    </GanttTaskFields>
    <GanttSelectionSettings Mode="Syncfusion.Blazor.Grids.SelectionMode.Row" Type="Syncfusion.Blazor.Grids.SelectionType.Multiple"></GanttSelectionSettings>
</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;
    }
}

Multiple Row Selection in Blazor Gantt Chart