title: in dropdownlist selectedindexchanged event doesnt change its state
body: <p>In the following code everytime its taking only one item from dropdownlist. When I select any other item from dropdownlist its same as first item.</p>
  
  <p>Please give solution</p>
  
  <pre><code>protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
  {
      DataSet _subcat = new DataSet();
      _subcat = serviceus.Get_SERVICEUS_SUB_CATEGORYLIST(DropDownList1.SelectedValue.ToString());
      lbsubcategory.DataSource = _subcat.Tables[0].DefaultView;
      lbsubcategory.DataTextField = Convert.ToString(_subcat.Tables[0].Columns["CATEGORY_SUB1_NAME"].ColumnName);
      lbsubcategory.DataBind();
      Label5.Visible = true;
  }
  </code></pre>