NeedDataSource Event

Fired when RadGrid needs a data source for rebinding.

Event Parameters

• (object) sender

  • The control that fires the event

• (GridNeedDataSourceEventArgs) e

  • Event arguments

    • (boolean) e.IsFromDetailTable

      Returns true if the event is fired for the DetailTable.

    • (GridRebindReason) e.RebindReason

      Gets a value specifying why the event was fired.

    • (int) e.RowsCount

      Gets a value specifying the number of rows that should be extracted from the data source when virtualization and custom paging are enabled.

    • (int) e.StartRowIndex

      Gets a value specifying the index of the first row in the data source that should be extracted when virtualization and custom paging are enabled.

Attaching the event

In the Markup

ASP.NET

<telerik:RadGrid ID="RadGrid1" runat="server" OnNeedDataSource="RadGrid1_NeedDataSource">
</telerik:RadGrid>

In the Code behind

C#

protected void Page_Init(object sender, EventArgs e)
{
    RadGrid1.NeedDataSource += RadGrid1_NeedDataSource;
}

VB

Protected Sub Page_Init(sender As Object, e As EventArgs) Handles Me.Init
    AddHandler RadGrid1.NeedDataSource, AddressOf RadGrid1_NeedDataSource
End Sub

The event handler

C#

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    bool isFromDetailTable = e.IsFromDetailTable;
    GridRebindReason rebindReason= e.RebindReason;
    int rowsCount = e.RowsCount;
    int startRowIndex = e.StartRowIndex;
}

VB

Protected Sub RadGrid1_NeedDataSource(ByVal sender As Object, ByVal e As GridNeedDataSourceEventArgs)
    Dim isFromDetailTable As Boolean = e.IsFromDetailTable
    Dim rebindReason As GridRebindReason = e.RebindReason
    Dim rowsCount As Integer = e.RowsCount
    Dim startRowIndex As Integer = e.StartRowIndex
End Sub

See Also

• Telerik RadGrid Event Sequence