在同一ListView中显示来自多个DataSources的数据

Question

I have a ListView and two dropdown controllers in the InsertItemTemplate. Those dropdown lists get their data from another table than the ListViews data.

<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="ObjectDataSource2"
   DataTextField="Genrename" DataValueField="GenreID" 
   SelectedValue='<%# Bind("GenreID") %>'>
</asp:DropDownList>
<br />
<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="ObjectDataSource3"
   DataTextField="Directorname" DataValueField="RegissorID"
   SelectedValue='<%# Bind("DirectorID") %>'>
</asp:DropDownList>

I am adding values to the main ListView, but the values I insert in the main table is ID values like, GenreID.

My table looks something like this:

Movie       |    Genre   |    Director
James Bond        3              4
Donald Duck       6              13
The Hangover      7              8

Now, i want to display the Names of the Genre and Director instead of the ID's, but i still need to insert the ID's inte my main table (movies).

This is how my ItemTemplate looks like:

<td>
   <asp:Label ID="GenreIDLabel" runat="server" Text='<%# Eval("GenreID") %>' />
</td>
<td>
   <asp:Label ID="RegissorIDLabel" runat="server" Text='<%# Eval("RegissorID") %>' />
</td>

Answer 1

Modify the SelectCommand of the datasource control that is being accessed by the ListView.
Join the three tables

Example:

 SelectCommand="Select m.movie,m.Genre,m.Director,g.GenreName,d.DirectorName From Movies as m Inner Join Genres as g ON m.Genre=g.GenreID Inner Join Directors as d ON m.Director=d.DirectorID"

After this point GenreName and DirectorName are accessible to your gridview. Update your ItemTemplate

 <td>
  <asp:Label ID="GenreIDLabel" runat="server" Text='<%# Eval("GenreName") %>' />
</td>
<td>
 <asp:Label ID="RegissorIDLabel" runat="server" Text='<%# Eval("DirectorName") %>' />
</td>

Edit I saw in your comment that you're getting the data from a list. I guess it works the same just update your select statement. In my example I assumed you're using SqlDataSource control