RadControls for ASP.NET AJAX
There is no default event for editor changes in grid columns - it is up to the developer
to attach events to these editors when necessary. This operation can be performed hooking the
ItemCreated event of Telerik RadGrid. For example - in case with
GridDropDownColumn
you have to:
Check whether the currently created grid item is
GridDataItem
and is in edit mode
Locate the dropdown list editor in the Controls collection of the cell which corresponds to the GridDropDownList column
Mark it with AutoPostBack = true and wire a handler to its SelectedIndexChanged event. Then in the SelectedIndexChanged handler you can update the selected value for the second dropdown.
CopyASPX
<telerik:RadGrid ID="RadGrid1" runat="server">
<MasterTableView EditMode="InPlace" AutoGenerateColumns="False">
<Columns>
<telerik:GridBoundColumn HeaderText="CustomerID" DataField="CustomerID" UniqueName="CustomerID">
</telerik:GridBoundColumn>
<telerik:GridDropDownColumn HeaderText="ContactName" ListDataMember="Customers" ListTextField="ContactName"
DataField="CustomerID" UniqueName="DropDownColumn1" ListValueField="CustomerID">
</telerik:GridDropDownColumn>
<telerik:GridDropDownColumn HeaderText="ContactTitle" ListDataMember="Customers"
ListTextField="ContactTitle" DataField="CustomerID" UniqueName="DropDownColumn2"
ListValueField="CustomerID">
</telerik:GridDropDownColumn>
<telerik:GridEditCommandColumn UniqueName="EditCommandColumn">
</telerik:GridEditCommandColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>CopyVB.NET
Private Sub RadGrid1_ItemCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemCreated
If (TypeOf e.Item Is GridEditableItem AndAlso e.Item.IsInEditMode) Then
Dim list As DropDownList =
CType(CType(e.Item, GridEditableItem)("DropDownColumn1").Controls(0),
DropDownList)
list.AutoPostBack = True
AddHandler list.SelectedIndexChanged, AddressOf list_SelectedIndexChanged
End If
End Sub
Private Sub list_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
End SubCopyC#
private void RadGrid1_ItemCreated(object sender, Telerik.Web.UI.GridItemEventArgs e)
{
if (e.Item is GridEditableItem && e.Item.IsInEditMode)
{
DropDownList list = (e.Item as GridEditableItem)["DropDownColumn1"].Controls[0] as DropDownList;
list.AutoPostBack = true;
list.SelectedIndexChanged += new System.EventHandler(this.list_SelectedIndexChanged);
}
}
private void list_SelectedIndexChanged(object sender, System.EventArgs e)
{
}