protected void DeleteAppDataSource_Click(object sender, ImageClickEventArgs e)
{
Hashtable State = (Hashtable)HttpRuntime.Cache[Session.SessionID];
Util util = new Util();
if (util.CheckSessionTimeout(State, Response, "../Default.aspx")) return;
DataSources DS = new DataSources();
string data_source_id = AppDataSources.Text.Substring(0,AppDataSources.Text.IndexOf(" ("));
DS.DeleteAppDataSource(State, data_source_id);
LoadData();
}