binding datatable to grid view

Question

I have the following code:

Imports System.Data

Partial Class Students_AddWishes Inherits System.Web.UI.Page

    Public dt As New DataTable

    Protected S         


        

Answer 1

You need to save the datatable to Session, because local variables are not preserved. So you need to do:

protected override OnLoad(..) //or OnInit
{
   dt = Session["DataTable"] as DataTable;
   if (dt == null)
   {
       dt = new DataTable();
       //load columns
   }
}

protected override OnUnLoad(..)
{
   Session["DataTable"] = dt;
}

Session saves the data table reference across postbacks as the web is stateless.