Help with Custom Edit Form Controls

[Liza]

Hi! I'm using a custom edit form with a web user control. In this web user control 

In this control I have an asp:button and I want to control the events for this control in the ItemCommand event of the radGrid. But when I try to access the button on this custom control I get nothing (this only occurs on RadGrid.InitInsertCommandName or RadGrid.EditCommandName)

Please, can you help me? And the most important thing, can I do what I'm trying to do?

This is the code that I have:

Dim MyUserControl As New UserControl

Select Case e.CommandName

Case RadGrid.InitInsertCommandName, RadGrid.EditCommandName 'here i want to add a postback controling into the RadAjaxManager of the RadGrid

MyUserControl = CType(e.Item.FindControl(GridEditFormInsertItem.EditFormUserControlID), UserControl)

If Not IsDBNull(CType(MyUserControl.FindControl("btnAddDoc"), Button)) Then

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                            CType(MyUserControl.FindControl("lstActiveDocs"), ListBox))

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                            CType(MyUserControl.FindControl("lstRelateDocs"), ListBox))

End If

Case "AddDocs" 'here I want to control the button click event

MyUserControl = CType(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)

'code for button click event

'       ...

'       ...

'       ...

Case RadGrid.CancelCommandName 'here i want to remove the postback controling into the RadAjaxManager of the RadGrid

For intX As Integer = 1 To RadAjaxManager1.AjaxSettings.Count - 1

RadAjaxManager1.AjaxSettings.RemoveAt(intX)

Next intX

End Select

Thanks,

Liza

[Princy]

Hello Liza,

It is too early to access the UserControl in the EditCommand or InsertCommand events. You can access the UserControl and thereby the button contained in the UserControl, in the ItemCreated/ItemDataBound event of the grid as shown below:
cs:

       Protected Sub RadGrid1_ItemCreated(ByVal sender As Object, ByVal e As GridItemEventArgs)
         If TypeOf e.Item Is GridEditableItem AndAlso (e.Item.IsInEditMode OrElse e.Item.OwnerTableView.IsItemInserted) Then
             Dim editItem As GridEditableItem = DirectCast(e.Item, GridEditableItem)
             Dim MyUserControl As UserControl = DirectCast(editItem.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)

             If Not (DirectCast(MyUserControl.FindControl("btnAddDoc"), Button) = System.DBNull.Value) Then
                 RadAjaxManager1.AjaxSettings.AddAjaxSetting(DirectCast(MyUserControl.FindControl("btnAddDoc"), Button), DirectCast(MyUserControl.FindControl("lstActiveDocs"), ListBox))
                 RadAjaxManager1.AjaxSettings.AddAjaxSetting(DirectCast(MyUserControl.FindControl("btnAddDoc"), Button), DirectCast(MyUserControl.FindControl("lstRelateDocs"), ListBox))
             End If
         End If
     End Sub

Thanks
Princy.

[Liza]

Hi! Thanks for answering so quickly.

I was trying to do what you put in that code, but I still having a NullReferenceExceptionError, and when I debug this code and check for MyUserControl value, this is nothing.

VB:

Protected Sub rdgDocsView_ItemCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rdgDocsView.ItemCreated

If TypeOf e.Item Is GridEditableItem AndAlso (e.Item.IsInEditMode OrElse e.Item.OwnerTableView.IsItemInserted) Then

Dim MyUserControl As UserControl = DirectCast(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)

If Not IsDBNull(CType(MyUserControl.FindControl("btnAddDoc"), Button)) Then

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                   CType(MyUserControl.FindControl("lstActiveDocs"), ListBox))

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                           CType(MyUserControl.FindControl("lstRelateDocs"), ListBox))

End If

End If

End Sub

Sorry, but what can I do?

Thanks,

Liza

[Liza]

Hi! Thanks for answering so quickly.

I was trying to do what you put in that code, but I still having a NullReferenceExceptionError, and when I debug this code and check for MyUserControl value, this is nothing.

VB:

Protected Sub rdgDocsView_ItemCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rdgDocsView.ItemCreated

If TypeOf e.Item Is GridEditableItem AndAlso (e.Item.IsInEditMode OrElse e.Item.OwnerTableView.IsItemInserted) Then

Dim MyUserControl As UserControl = DirectCast(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)

If Not IsDBNull(CType(MyUserControl.FindControl("btnAddDoc"), Button)) Then

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                   CType(MyUserControl.FindControl("lstActiveDocs"), ListBox))

RadAjaxManager1.AjaxSettings.AddAjaxSetting(CType(MyUserControl.FindControl("btnAddDoc"), Button), _                                                           CType(MyUserControl.FindControl("lstRelateDocs"), ListBox))

End If

End If

End Sub

Sorry, but what can I do?

Thanks,

Liza