Change RadComboBox to TextBox in an EditItemTemplate on some rows dependig on data

[Tonino]

Hello!

 

I have a grid with RadComboBox in an EditItemTemplate:


 

<telerik:GridTemplateColumn DataField="Value" HeaderText="Wert">

   <EditItemTemplate>

      <telerik:RadComboBox ID="cboFeatureValue" runat="server" DataSourceID="odsFeatureValueList"

         SelectedValue='<%# Bind("Value") %>' DataTextField="Text" DataValueField="Value"

         Skin="Default">

      </telerik:RadComboBox>

   </EditItemTemplate>

   <ItemTemplate>

      <asp:Label ID="lblFeatureValue" runat="server" Text='<%# Eval("Value") %>'></asp:Label>

   </ItemTemplate>

</telerik:GridTemplateColumn>

 

On some rows, depending on the data, I need a TextBox instead of the RadComboBox. Any idea how to achieve this?

 

I tried adding the TextBox in the EditITemTemplate and disabling the not wanted control:

<asp:TextBox runat="server" Text='<%# Bind("Value") %>' ID="txtFeatureValue"/>

and in here I disable the not wanted control:

Private Sub grdFeatureList_ItemDataBound(sender As Object, e As GridItemEventArgs) Handles grdFeatureList.ItemDataBound
   If TypeOf e.Item Is GridEditableItem AndAlso e.Item.IsInEditMode Then
      Dim dataItem As GridEditableItem = TryCast(e.Item, GridEditableItem)
      If _FeatureParameter.Contains("Enum") Then
         Dim textBox As TextBox = CType(dataItem.FindControl("txtFeatureValue"), TextBox)
         textBox.Enabled = False
         textBox.Visible = False
      Else
         Dim radComboBox As RadComboBox = CType(dataItem.FindControl("cboFeatureValue"), RadComboBox)
         radComboBox.Enabled = False
         radComboBox.Visible = False
      End If
   End If
End Sub

 

 

The problem is, that the Selecting event of the RadComboBox is called before I can disable the ComboBox. And as I don't have any data for the combo box I get an "Selection out of range" exception.

 

Thanks for helping!

 

Regards,

Tonino.

[Eyup]

Hi Tonino,

Try to execute the logic on ItemCreated instead of ItemDataBound. If the error remains, you can clear the SelectedValue="" property of the combo, for example during the ItemCreated event of the grid or DataBinding  or Init event handlers of the combo itself.

Regards,
Eyup
Telerik

[Tonino]

Hi Eyup!

Using ItemCreated is working, thank you!

Now I get a dropdown box in edit mode. The textbox is edit mode is not working. Is something wrong with the TextBox I added in the EditItemTemplate?

 

Regards,

Tonino.

 

[Eyup]

Hello Tonino,

Try placing the TextBox definition before the RadComboBox. If the issue remains, you can create 2 separate columns for these controls, hide one of the columns using its Visible or Display property, and toggle visibility of the generated editing controls by using editedItem["ColNameGoesHere"].Parent.Visible="false":
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/rows/accessing-cells-and-rows#accessing-controls-in-editinsert-mode

Regards,
Eyup
Telerik