I'm trying to make the contents of the second dropdownlist dependent on what someone chooses in the first dropdownlist within a detailsview control. However, right now all I get when I try and switch what is in the first dropdownlist is "Object reference not set to an instance of an object." The bug points to line 49 of the below C# code. Any ideas?
C#:
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7
8 public partial class Management_ManageListing : System.Web.UI.Page
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