Help needed on finding a control in a grid edit form

[Andy Green]

Hi

I have an EditFormTemplate and in the FormTemplate I have 2 dropdowns (They are asp:dropdowns, not Rad ones) I can populate them with data from code behind but what I want to do is populate the second ddlist from a value from the first.

This is the first ddl markup

<

 

asp:DropDownList ID="ddlSite" runat="server" AutoPostBack="true" SelectedIndexChanged="UpdateLocation"></asp:DropDownList>

On ther server I get the UpdateLocation event

 

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



        Dim ddlLocation As DropDownList = DirectCast(FindControl("ddlLocation"), DropDownList)
        Dim mw As New CoreData
        Dim mw_dt As DataTable = mw.LocationByParent(sender.selectedvalue)
        If mw_dt.Rows.Count > 0 Then
            With ddlLocation
                .Items.Add(New ListItem("", 0))
                .DataSource = mw_dt
                .DataValueField = "LocationId"
                .DataTextField = "LocationName"
            End With
        End If

    End Sub

The problem is that the value for the second dropdownlist is always nothingm the findcontrol is failing.

I have also tried the following to find the control:

 

Dim editedItem As GridEditableItem = CType(CType(sender, DropDownList).NamingContainer, GridEditableItem)

 

 

Dim ddlLocationt As DropDownList = CType(editedItem("ddlLocation").Controls(0), DropDownList)

 

 

How do I get a handle on the second DropdownList?

Andy

 

 

[Shinu]

Hello,

You can access the second DropDownList using the NamingContainer property after getting reference to the first DropDownList. Here is an example.

VB:

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
    Dim dropDown As DropDownList = DirectCast(sender, DropDownList)
    Dim editForm As GridEditFormItem = DirectCast(dropDown.NamingContainer, GridEditFormItem)
    Dim secondDropdown As DropDownList = DirectCast(editForm.FindControl("DropDownList2"), DropDownList)
    secondDropdown.Enabled = False
End Sub

-Shinu.

[Andy Green]

Thanks Shinu

Andy