Gridview sorting

Below is sample code to sort GridView in ASP.Net. This example is based in c#

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
public partial class Datagrid : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void InitControl(DataTable dtData)
{
try
{
ViewState["dtData"] = dtData;
dgcomonGrid.DataSource = dtData;
dgcomonGrid.DataBind();
}
catch (Exception Ex)
{
throw Ex;
}
}
protected void sortmethod(object sender, GridViewSortEventArgs e)
{
try
{
ViewState["sortcolumn"] = e.SortExpression;
if (ViewState["sortorder"] == null)
{
ViewState["sortorder"] = "asc";
}
ViewState["sortorder"] = ViewState["sortorder"].ToString() == "asc" ? "desc" : "asc";
DataView dv = new DataView((DataTable)ViewState["dtData"]);
dv.Sort = ViewState["sortcolumn"] + " " + ViewState["sortorder"];
dgcomonGrid.DataSource = dv;
dgcomonGrid.DataBind();
}
catch (Exception Ex)
{
throw Ex;
}
}
 
}