1.GridView

• AutoGenerateColums =false;
• DataSource
• DataBind

2.BoundField

• DataField
• HeaderText
• ItemStyle.HorizontalAlign
• Visible

3.StringWriter sw =new StringWriter ();

4.HtmlTextWriter htw =new HtmlTextWriter(sw);

5.Gridview.RenderConterol(htw)

6.Response

• Response.ClearContent();
• Response.AddHeader("content-disposition", "attachment; filename=name.xls");
• Response.ContentType = "application/unknown";
• Response.Write("<meta http-equiv='Content-Type' content='text/html; charset=" + Request.ContentEncoding.HeaderName+ "'>");
• Response.Write(sw.ToString());
• Response.End();