submit selected value of drop down list value when update data in grid view with sql data source?

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C#

ASP.NET

SqlDataSource

Dears,
I have grid view which get data from sql data source,
and one column are foreign key so i made another sql Data source to get the value,

Every thing work fine (getting data and select) except updating the value in drop down list in edit mode,

here is summary of my code:
Main Data Source (Airport Buildings):

<asp:SqlDataSource ID="SqlDataSource1">
 <UpdateParameters>
 <asp:Parameter Name="AirportID" Type="Int32"   />
 <asp:Parameter Name="BuildingID" Type="Int32" />
 <asp:Parameter Name="BuildingName" Type="String" />
 <asp:Parameter Name="Description" Type="String" />
 </UpdateParameters>
</asp:SqlDataSource>

Source of Lookup tabel:
 <asp:SqlDataSource ID="sdsAirports"/>

column of Grid View with DataSourceID="SqlDataSource1" :

  <asp:TemplateField HeaderText="AirportID" SortExpression="AirportID" >
<EditItemTemplate>
<asp:DropDownList ID="DropDownList1"  runat="server"  DataSourceID="sdsAirports" DataTextField="AirportName" DataValueField="AirportID"  SelectedValue='<%# Eval("AirportID").ToString() %>' >
</asp:DropDownList>
                                
</EditItemTemplate>
<ItemTemplate>
<asp:DropDownList ID="DropDownList11" runat="server" DataSourceID="sdsAirports" DataTextField="AirportName" DataValueField="AirportID" SelectedValue='<%# Eval("AirportID").ToString() %>' Enabled="false">
 </asp:DropDownList>
 <%--<asp:Label ID="Label1" runat="server" Text='<%# Bind("AirportName") %>'></asp:Label>--%>
</ItemTemplate>
                           
</asp:TemplateField>

 <asp:TemplateField HeaderText="BuildingName" SortExpression="BuildingName">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("BuildingName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("BuildingName") %>'></asp:Label>
</ItemTemplate>

</asp:TemplateField>