RadGrid for ASP.NET AJAX

There are cases in which you would like to display/not display image inside GridButtonColumn/GridTemplateColumn in relation with value in other column.

The example below demonstrates how to fulfill this task for GridButtonColumn and GridCheckBoxColumn (note that similar operations can be performed for GridTemplateColumn and other column types). You can retrieve reference to the checkbox the inside the grid item cell which correspond to the GridCheckBoxColumn . This can be done in the ItemDataBound handler of the grid. After you get the checkbox control you can verify whether the checkbox is checked (to assign ImageUrl for the ImageButton in the GridButtonColumn) or not checked (to clear the controls inside the respective GridButtonColumn cell).

Here is an example (CheckBoxColumn and ButtonColumn are the UniqueNames for our columns):

• ASPNET
• C#
• VB.NET

CopyASPX

<telerik:RadGrid ID="RadGrid1" runat="server">
  <MasterTableView AutoGenerateColumns="False">
    <Columns>
      <telerik:GridButtonColumn CommandName="MyCommand" ButtonType="ImageButton" UniqueName="ButtonColumn">
      </telerik:GridButtonColumn>
      <telerik:GridBoundColumn HeaderText="ContactName" DataField="ContactName" UniqueName="ContactName">
      </telerik:GridBoundColumn>
      <telerik:GridBoundColumn HeaderText="ContactTitle" DataField="ContactTitle" UniqueName="ContactTitle">
      </telerik:GridBoundColumn>
      <telerik:GridCheckBoxColumn UniqueName="CheckBoxColumn" DataField="Bool">
      </telerik:GridCheckBoxColumn>
    </Columns>
  </MasterTableView>
</telerik:RadGrid>

CopyC#

private void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
{
    if (e.Item is GridDataItem)
    {
        GridDataItem dataItem = e.Item as GridDataItem;
        CheckBox box = dataItem["CheckBoxColumn"].Controls[0] as CheckBox;
        if (box.Checked)
        {
            (dataItem["ButtonColumn"].Controls[0] as ImageButton).ImageUrl = "RadControls/Grid/Skins/Default/Edit.gif";
        }
        else
        {
            dataItem["ButtonColumn"].Controls[0].Visible = false;
        }
    }
}

CopyVB.NET

Private Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs)
    If TypeOf e.Item Is GridDataItem Then
        Dim dataItem As GridDataItem = CType(e.Item, GridDataItem)
        Dim box As CheckBox = CType(dataItem("CheckBoxColumn").Controls(0), CheckBox)
        If box.Checked Then
            CType(dataItem("ButtonColumn").Controls(0), ImageButton).ImageUrl = "RadControls/Grid/Skins/Default/Edit.gif"
        Else
            dataItem("ButtonColumn").Controls(0).Visible = False
        End If
    End If
End Sub