[Solved] Dynamically add GridDropDownColumn on DetailTable

[Kevin]

I need a dropdown list column with a different datasource for each detail table, so I am programmatically adding a new column to each DetailTable when it gets databound.  The column gets added but has no values in view/edit mode.  Any ideas why the following code fails to populate the values?

    Private Sub radgrid1_DetailTableDataBind(ByVal source As Object, ByVal e As Telerik.Web.UI.GridDetailTableDataBindEventArgs) Handles radgrid1.DetailTableDataBind
        If e.DetailTableView.Name = "DetailTable2" Then
            Dim dropdownColumn As New Telerik.Web.UI.GridDropDownColumn()
            dropdownColumn.HeaderText = "Test"
            dropdownColumn.UniqueName = "dropdownColumn"
            dropdownColumn.DropDownControlType = GridDropDownColumnControlType.DropDownList
            e.DetailTableView.Columns.Insert(2, dropdownColumn)
        End If
    End Sub

    Private Sub radgrid1_ItemCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles radgrid1.ItemCreated
        If e.Item.OwnerTableView.Name = "DetailTable2" Then
            If TypeOf e.Item Is GridEditableItem Then
                Dim item As GridEditableItem = DirectCast(e.Item, GridEditableItem)
                Dim dropdownColumn As GridDropDownColumn = DirectCast(item.OwnerTableView.Columns(2), GridDropDownColumn)

                Dim data As New Dictionary(Of String, String)
                data.Add("A", "A")
                data.Add("B", "B")
                dropdownColumn.FillValues(data, item)
            End If
        End If
    End Sub

[Georgi Krustev]

Hello Kevin,

To attain the functionality you are searching for, you need to bind the built-in GridDropDownColumn. For further information you can review this online demo.

Best wishes,
Georgi Krustev
the Telerik team

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