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Listbox within a Datagrid

Listbox within a Datagrid

Listbox within a Datagrid

I'm trying to add a listbox to a datagridview. I've created a item template within the grid now I'm trying to find the control so I can bind the list to a sql table. I'm getting e.item is not a member of system.eventargs. what am I missing? I've also tried rowdata bound, load and row created and still keep getting the same error.


Private Sub dg_DataBound(sender As Object, e As System.EventArgs) Handles dg.DataBound

Dim list As ListBox = CType(e.item.findcontrol("list1"), ListBox)

End Sub

RE: Listbox within a Datagrid

You have to use the rowdatabound event



RE: Listbox within a Datagrid


I'm still getting an error....Object reference not set to an instance of an object

Private Sub dg_RowDataBound(sender As Object, e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles dg.RowDataBound

Dim myListBox As ListBox = DirectCast(e.Row.FindControl("list"), ListBox)

myListBox.BackColor = Drawing.Color.Aquamarine

End Sub

RE: Listbox within a Datagrid

did you check the row type as the rowdatabound event fires?

Select Case e.Row.RowType
Case DataControlRowType.DataRow
'Do your stuff here

end Select

RE: Listbox within a Datagrid

Thanks for this.... Now, Do I really need to bind the grid and then bind the listbox separate ?

RE: Listbox within a Datagrid


Now, Do I really need to bind the grid and then bind the listbox separate ?
Yes. It won't do it automatically unless you use the DataSource controls which I don't suggest you ever use.

Your grid will bind to the datasource you provide, but it has no idea what you want to do with the listbox in the template column.
So, you have to then find the control, set the datasource and bind it.

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