How to Export Value from Data Set to Excel Sheet

Pls try it.....

public void ExportToExcel(DataTable dt)
{
if (dt.Rows.Count > 0)
{
string filename = "ExcelFileName.xls";
System.IO.StringWriter tw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
DataGrid dgGrid = new DataGrid();
dgGrid.DataSource = dt;
dgGrid.DataBind();

//Get the HTML for the control.
dgGrid.RenderControl(hw);
//Write the HTML back to the browser.
//Response.ContentType = application/vnd.ms-excel;
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
this.EnableViewState = false;
Response.Write(tw.ToString());
Response.End();
}
}

protected void btnSave_Click(object sender, EventArgs e)
{
ExportToExcel((DataTable)ViewState["gvMobile"]);
}

public override void VerifyRenderingInServerForm(Control control)

{

}