把GridView中选中的行导出为Excel文件

01    DataTable dt = new DataTable();02 dt.Columns.Add("empid");03 dt.Columns.Add("empname");04 foreach (GridViewRow row in GridView1.Rows)05 {06     CheckBox chk = (CheckBox)row.FindControl("CheckBox1");07     if (chk.Checked == true)08     {09         int i = row.RowIndex;10         Label lbl = (Label)GridView1.Rows[i].FindControl("Label1");11         Label lbl1 = (Label)GridView1.Rows[i].FindControl("Label2");12         DataRow dr = dt.NewRow();13         dr["empid"] = Convert.ToString(lbl.Text);14         dr["empname"] = Convert.ToString(lbl1.Text);15         dt.Rows.Add(dr);16     }17 }18 GridView GridView1= new GridView()19 GridView1.DataSource = dt;20 GridView1.DataBind();21 Response.Clear();22 Response.Buffer = true;23 Response.ContentType = "application/ms-excel";24 Response.AddHeader("content-disposition",             string.Format("attachment;filename={0}.xls", "selectedrows"));25 Response.Charset = "";26 System.IO.StringWriter stringwriter = new StringWriter();27 HtmlTextWriter htmlwriter = new HtmlTextWriter(stringwriter);28 gd.RenderControl(htmlwriter);29 Response.Write(stringwriter.ToString());30 Response.End();