paging using dropdown........

protected void GridView1_DataBound(object sender, EventArgs e)
   {

       for (int i = 1; i <= GridView1.PageCount; i++)
       {
           DropDownList1.Items.Insert( DropDownList1.Items.Count-1 ,i);

       }
   }

protected void ddlPaging_SelectedIndexChanged(object sender, EventArgs e)
   {
      
       GridView1.PageIndex = DropDownList1.SelectedIndex;
         loadgrid();  //function to load grid view
   }