Export data to Word from the grid view

 protected void word_Click(object sender, ImageClickEventArgs e)
    {
        grdCategory.AllowPaging = false;
        grdCategory.DataBind();
        Response.ClearContent();
        Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "SetaDirectory.doc"));
        Response.Charset = "";
        Response.ContentType = "application/ms-word";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        grdCategory.RenderControl(htw);
        Response.Write(sw.ToString());
        Response.End();
    }