GridDropDownColumn first row does not show value

[ShahabG]

Hi
I load the grid and GridDropDownColumn column from code behind, everty thing works fine except the first row doesn't show the value
thanks
small sample which I found from Forum

<div>
           <telerik:RadGrid runat="server" ID="RadGrid1"
               AutoGenerateColumns="false" AllowPaging="true" AutoGenerateEditColumn="true" >
               <MasterTableView  EditMode="InPlace">
                   <Columns>
                       <telerik:GridBoundColumn DataField="Col1">
                       </telerik:GridBoundColumn>
                       <telerik:GridDropDownColumn DataField="Col2" ListTextField="value" ListValueField="index"
                           UniqueName="DropDownColumn">
                       </telerik:GridDropDownColumn>
                   </Columns>
               </MasterTableView>
           </telerik:RadGrid>
       </div>

code behind

Imports Telerik.Web.UI
Public Class WebForm6
    Inherits System.Web.UI.Page
    Private _isBound As Boolean = False
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

    Private Sub RadGrid1_ItemCreated(sender As Object, e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemCreated
        If TypeOf e.Item Is GridDataItem Then
            If Not _isBound Then
                DirectCast(DirectCast(RadGrid1.MasterTableView.GetColumnSafe("DropDownColumn"), GridDropDownColumn).ColumnEditor, GridDropDownColumnEditor).DataSource = GetDropDownData()
                _isBound = True
            End If
        End If
    End Sub

    Private Sub RadGrid1_NeedDataSource(sender As Object, e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles RadGrid1.NeedDataSource
        RadGrid1.DataSource = GetGridData()
    End Sub

    Private Function GetDropDownData() As DataTable
        Dim dataTable As New DataTable()
        dataTable.Columns.Add("index")
        dataTable.Columns.Add("value")

        For i As Integer = 0 To 19
            dataTable.Rows.Add(New Object() {i, i})
        Next
        Return dataTable
    End Function
    Private Function GetGridData() As DataTable
        Dim dataTable As New DataTable()
        dataTable.Columns.Add("Col1")
        dataTable.Columns.Add("Col2")

        For i As Integer = 0 To 19
            dataTable.Rows.Add(New Object() {i, i})
        Next
        Return dataTable
    End Function
End Class

[Princy]

Hi,

Please have a look at this forum which posts about the same issue as yours.
Hope this helps you.If not please let know.

Thanks,
 Princy

[Jayesh Goyani]

Hello,

Please try with below code snippet.

<telerik:RadGrid runat="server" ID="RadGrid1" AutoGenerateColumns="false" AllowPaging="true"
       OnNeedDataSource="RadGrid1_NeedDataSource" OnItemCreated="RadGrid1_ItemCreated"
       OnItemDataBound="RadGrid1_ItemDataBound">
       <MasterTableView EditMode="InPlace" DataKeyNames="Col2">
           <Columns>
               <telerik:GridBoundColumn DataField="Col1">
               </telerik:GridBoundColumn>
               <telerik:GridDropDownColumn DataField="Col2" ListTextField="value" ListValueField="index"
                   UniqueName="DropDownColumn">
               </telerik:GridDropDownColumn>
               <telerik:GridEditCommandColumn></telerik:GridEditCommandColumn>
           </Columns>
       </MasterTableView>
   </telerik:RadGrid>

Protected Sub Page_Load(sender As Object, e As System.EventArgs)

End Sub
Protected Sub RadGrid1_ItemCreated(sender As Object, e As Telerik.Web.UI.GridItemEventArgs)

End Sub

Protected Sub RadGrid1_NeedDataSource(sender As Object, e As Telerik.Web.UI.GridNeedDataSourceEventArgs)
    RadGrid1.DataSource = GetGridData()
End Sub

Private Function GetDropDownData() As DataTable
    Dim dataTable As New DataTable()
    dataTable.Columns.Add("index")
    dataTable.Columns.Add("value")

    For i As Integer = 0 To 19
        dataTable.Rows.Add(New Object() {i, i})
    Next
    Return dataTable
End Function
Private Function GetGridData() As DataTable
    Dim dataTable As New DataTable()
    dataTable.Columns.Add("Col1")
    dataTable.Columns.Add("Col2")

    For i As Integer = 0 To 19
        dataTable.Rows.Add(New Object() {i, i})
    Next
    Return dataTable
End Function

Protected Sub RadGrid1_ItemDataBound(sender As Object, e As GridItemEventArgs)
    If TypeOf e.Item Is GridDataItem Then
        Dim dataItem As GridDataItem = DirectCast(e.Item, GridDataItem)

        If (dataItem("DropDownColumn").Controls(0)).[GetType]() = GetType(System.Web.UI.WebControls.Literal) Then
            DirectCast(dataItem("DropDownColumn").Controls(0), Literal).Text = dataItem.GetDataKeyValue("Col2").ToString()
        End If
    End If

    If TypeOf e.Item Is GridEditableItem AndAlso e.Item.IsInEditMode Then
        Dim dataItem As GridEditableItem = DirectCast(e.Item, GridEditableItem)
        DirectCast(DirectCast(RadGrid1.MasterTableView.GetColumnSafe("DropDownColumn"), GridDropDownColumn).ColumnEditor, GridDropDownColumnEditor).DataSource = GetDropDownData()
        DirectCast(DirectCast(RadGrid1.MasterTableView.GetColumnSafe("DropDownColumn"), GridDropDownColumn).ColumnEditor, GridDropDownColumnEditor).DataBind()
        DirectCast(DirectCast(RadGrid1.MasterTableView.GetColumnSafe("DropDownColumn"), GridDropDownColumn).ColumnEditor, GridDropDownColumnEditor).SelectedValue = dataItem.GetDataKeyValue("Col2").ToString()
    End If
End Sub

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Thanks,
Jayesh Goyani

[ShahabG]

Thanks Jayesh,
 It worked fine, But when I change the EditMode="Batch" ,The ItemDataBound event will not trigger, Do you know how to solve this issue?
Thanks

[Jayesh Goyani]

Hello,

<ClientSettings>
           <ClientEvents OnBatchEditSetEditorValue="GetEditorValue" />
       </ClientSettings>

<script type="text/javascript">
       function GetEditorValue(sender, args) {
           if (args.get_columnUniqueName() === "DropDownColumn") {
               var combobox = $telerik.findControl(args.get_container(), "DropDownColumn");
               // Please access combobox here (and add item here).
           }
       }
   </script>

Add Item in RadComboBox on Clinet side
Batch Editing : Access control and get/set value in it

Thanks,
Jayesh Goyani

[ShahabG]

Thanks,
Is there a Server side event which I can use instead of client side?
thanks

[Jayesh Goyani]

Hello,

As per my knowledge there is not any server side event is there.

Thanks,
Jayesh Goyani

[ShahabG]

Hi Jayesh
I have 4 grids on batch mode on a page, I have to updated all of them in once with a Save button, How do I get only the records which are changed in each grid?
Thanks

[Angel Petrov]

Hi Shahab,

I have already provided an answer to this question in the other forum ticket which you have opened regarding this matter. In order to avoid duplicate posts I suggest that we continue our communication there.

Regards,
Angel Petrov
Telerik