Update on GridView combobox not updating - asp.net

Question

I am trying to bind the DropDownList(DDL) with my entity datasource. The GridView(GV) is bound to a different EntityDataSource than the DDL. The GV's EntityDataSource has a navigation property 'Bag' for the relationship. In edit mode I can pick a different item, but it does not update the database for that record. I did use the include for the navigations in the EntityDataSource. I am sure the wiring is not correct. I have tried searching with no luck so far. Thanks for the help.
<asp:TemplateField HeaderText="Bag">
<ItemTemplate >
<asp:Label ID="lbEditBag" Text='<%#Eval("Bag.Item1") %>' runat="server" />
</ItemTemplate>
<EditItemTemplate >
<asp:DropDownList runat="server" ID="ddlBags" DataSourceID="edsBags" DataTextField="Amount" DataValueField="BagId" />
</EditItemTemplate>
</asp:TemplateField>

Answer 1

DonA, if you've not found your answer yet I will explain what I have done to do something similar to what your after I believe.
In a gridview I have various asp:TempleteField's, one which is like this:-
<ItemTemplate>
<asp:Label ID="lblActive" runat="server" Text='<%# Bind("Active") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<%--<asp:TextBox ID="txtboxActive" runat="server" Text='<%# Bind("Active") %>' Width="20px" TextMode="SingleLine" CssClass="textboxEdit"></asp:TextBox>--%>
<asp:DropDownList ID="activeDDL" CausesValidation="False" AutoPostBack="False" runat="server"> <asp:ListItem Text="No" Value="0"></asp:ListItem>
<asp:ListItem Text="Yes" Value="1" Selected="True"></asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
which as you can see has two dropdownlist items in the EditItemTemplete (I also left in similar code to yours that I used to use to bind to a database for the DDL values but I don't use anymore so is commented out)
then alongside the ID, runat="server", DataKeyNames, etc. in
<asp:Gridview ID=""...
i have
OnRowUpdated="info_GridView_RowUpdated"
This then runs in my C# code behind an SQL function to update the database table with the setting from the DDL, like so (I have also put in a few other Gridview.Databind() to reset my other gridviews)
protected void info_GridView_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
// The update operation was successful. Retrieve the row being edited.
int index = info_GridView.EditIndex;
GridViewRow row = info_GridView.Rows[index];
int itemID = Convert.ToInt32(row.Cells[4].Text); // Cells[4] is only one available as others are being edited!
// update Active value in the database //
comm = new SqlCommand("UPDATE Products SET Active=#active WHERE ItemID=#itemID", objConn);
comm.Parameters.AddWithValue("#active", ddlValue); // this stores DDL value in database
comm.Parameters.AddWithValue("#itemID", itemID);// Convert.ToInt32(propertyRefTextBox.Text));
objConn.Open();
comm.ExecuteNonQuery();
objConn.Close();
// force update and reset selectedIndex of other gridviews //
Category_GridView.DataBind();
editImages_GridView.DataBind();
Category_GridView.SelectedIndex = -1;
editImages_GridView.SelectedIndex = -1;
}
hope the above helps.
Trev.