Adding a DataDependent DropDownList to the DataGrid's Footer

<% @Import Namespace="System.Data" %>
<% @Import Namespace="System.Data.SqlClient" %>
<script language="vb" runat="server">
'Create a connection
Dim myConnection as New SqlConnection(ConfigurationSettings.AppSettings("connectionString"))
Dim ddlDataSet as DataSet = New DataSet()
Sub Page_Load(sender as Object, e as EventArgs)
If Not Page.IsPostBack then
BindData()
End If
End Sub
Sub BindData()
'2. Create the command object, passing in the SQL string
Const strSQL as String = "SELECT FAQID, F.FAQCategoryID, F.Description, FC.Name AS CategoryName FROM tblFAQ F INNER JOIN tblFAQCategory FC ON F.FAQCategoryID = FC.FAQCategoryID WHERE FAQID <= 25"
'Set the datagrid's datasource to the datareader and databind
Dim resultsDataSet as New DataSet()
Dim myDataAdapter as SqlDataAdapter = New SqlDataAdapter(strSQL, myConnection)
myDataAdapter.Fill(resultsDataSet)
dgPopularFAQs.DataSource = resultsDataSet
dgPopularFAQs.DataBind()
End Sub
Function GetCategories() as DataSet
'Populate the ddlDataSet
Const strSQLDDL as String = _
"SELECT FAQCategoryID, Name FROM tblFAQCategory ORDER BY Name"
Dim myDataAdapter as SqlDataAdapter = New _
SqlDataAdapter(strSQLDDL, myConnection)
myDataAdapter.Fill(ddlDataSet, "Categories")
Return ddlDataSet
End Function
Function GetSelectedIndex(CID as String) as Integer
Dim iLoop as Integer
Dim dt as DataTable = ddlDataSet.Tables("Categories")
For iLoop = 0 to dt.Rows.Count - 1
If Int32.Parse(CID) = Int32.Parse(dt.Rows(iLoop)("FAQCategoryID")) then
Return iLoop
End If
Next iLoop
End Function
Sub dgPopFAQs_Edit(sender As Object, e As DataGridCommandEventArgs)
dgPopularFAQs.EditItemIndex = e.Item.ItemIndex
BindData()
dgPopularFAQs.ShowFooter = False
End Sub
Sub dgPopFAQs_Cancel(sender As Object, e As DataGridCommandEventArgs)
dgPopularFAQs.EditItemIndex = -1
BindData()
dgPopularFAQs.ShowFooter = True
End Sub
Sub dgPopFAQs_Update(sender As Object, e As DataGridCommandEventArgs)
Response.Write("<b>The Update Command has no effect on this live demo...</b>")
dgPopularFAQs.EditItemIndex = -1
BindData()
End Sub
Sub dgPopFAQs_Insert(sender as Object, e As DataGridCommandEventArgs)
If e.CommandName = "Insert" then
Dim txtNewDescription as TextBox = e.Item.FindControl("txtNewDescription")
Dim lstCategoriesInsert as DropDownList = e.Item.FindControl("lstCategoriesInsert")
Response.Write("<b>The Insert Command has no effect on this live demo...</b><br />")
Response.Write("<b>The data you would have inserted, though, was:<ul>")
Response.Write("<li>" & lstCategoriesInsert.SelectedItem.Text & "</li>")
Response.Write("<li>" & txtNewDescription.Text & "</li></ul></b>")
End If
End Sub
</script>
<form runat="server">
<asp:datagrid id="dgPopularFAQs" runat="server"
AutoGenerateColumns="False"
HeaderStyle-HorizontalAlign="Center"
HeaderStyle-BackColor="Red"
HeaderStyle-ForeColor="White"
HeaderStyle-Font-Bold="True"
HeaderStyle-Font-Name="Verdana"
AlternatingItemStyle-BackColor="#dddddd"
ItemStyle-Font-Name="Verdana"
OnEditCommand="dgPopFAQs_Edit"
OnCancelCommand="dgPopFAQs_Cancel"
OnUpdateCommand="dgPopFAQs_Update"
OnItemCommand="dgPopFAQs_Insert"
ShowFooter="True">
<Columns>
<asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="OK" />
<asp:TemplateColumn ItemStyle-Width="10%"
ItemStyle-HorizontalAlign="Center" HeaderText="FAQ ID"
FooterStyle-HorizontalAlign="Center">
<ItemTemplate>
<%# Container.DataItem("FAQID") %>
</ItemTemplate>
<FooterTemplate>
<asp:Button Text="Add" CommandName="Insert" runat="server" />
</FooterTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Category">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "CategoryName") %>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList runat="server" id="lstCategories"
DataValueField="FAQCategoryID"  DataTextField="Name"
DataSource='<%# GetCategories() %>'
SelectedIndex='<%# GetSelectedIndex(Container.DataItem("FAQCategoryID")) %>' />
</EditItemTemplate>
<FooterTemplate>
<asp:DropDownList runat="server" id="lstCategoriesInsert"
DataValueField="FAQCategoryID"  DataTextField="Name"
DataSource='<%# GetCategories() %>' />
</FooterTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="FAQ Question">
<ItemTemplate>
<%# Container.DataItem("Description") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" Text='<%# Container.DataItem("Description") %>'
Columns="80" />
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox id="txtNewDescription" runat="server" Columns="80" />
</FooterTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid>
</form>