日期:2014-05-18 浏览次数:20424 次
protected void Button1_Click(object sender, EventArgs e) { s.AppendLine("<table style='width:800px' border=1>"); for (int i = 0; i < GridView1.Rows.Count; i++) { CheckBox ck = (CheckBox)GridView1.Rows[i].Cells[0].FindControl("CheckBox1"); if (ck.Checked) { //GridView1.Columns s.AppendLine(" <tr>"); for (int j = 0; j < GridView1.Columns.Count; j++) { s.AppendFormat("<td>{0} </td>", ((Label)GridView1.Rows[i].Cells[j].FindControl("Label")).Text); // 提示出错:System.NullReferenceException: 未将对象引用设置到对象的实例。 } s.AppendLine(" </tr>"); } } s.Append("</table>"); Export("application/ms-excel", "excel.xls", s.ToString()); } private void Export(string FileType, string FileName, string s) { Response.Charset = "UTF-8"; Response.ContentEncoding = System.Text.Encoding.UTF8; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString()); Response.ContentType = FileType; Response.Write(s); Response.End(); }
for (int i = 0; i < GridView1.Rows.Count; i++) { CheckBox ck = GridView1.Rows[i].FindControl("CheckBox1") as CheckBox; if (ck!=null&&ck.Checked) { s.AppendLine(" <tr>"); Label lbl=GridView1.Rows[i].FindControl("Label1") as Label; if(lbl!=null) { s.AppendFormat(" <td>{0} </td>", lbl.Text); } lbl=GridView1.Rows[i].FindControl("Label2") as Label; if(lbl!=null) { s.AppendFormat(" <td>{0} </td>", lbl.Text); } ... s.AppendLine(" </tr>"); } }