VerifyRenderingInServerForm(System.Web.UI.Control),同时将网格视图导出为pdf

using System;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;
using iTextSharp.text;
using iTextSharp.text.pdf;

public partial class MyPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // 在页面加载时绑定数据到GridView
        BindGridView();
    }

    protected void btnExport_Click(object sender, EventArgs e)
    {
        // 创建一个文档对象
        Document document = new Document();

        // 创建一个PDF写入器
        PdfWriter writer = PdfWriter.GetInstance(document, new FileStream("GridView.pdf", FileMode.Create));

        // 打开文档
        document.Open();

        // 创建一个字体对象
        Font font = FontFactory.GetFont(FontFactory.HELVETICA, 8);

        // 创建一个表格对象
        PdfPTable table = new PdfPTable(GridView1.Columns.Count);

        // 添加表头
        for (int i = 0; i < GridView1.Columns.Count; i++)
        {
            table.AddCell(new Phrase(GridView1.Columns[i].HeaderText, font));
        }

        // 添加数据行
        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            for (int j = 0; j < GridView1.Columns.Count; j++)
            {
                table.AddCell(new Phrase(GridView1.Rows[i].Cells[j].Text, font));
            }
        }

        // 将表格添加到文档中
        document.Add(table);

        // 关闭文档
        document.Close();

        // 下载生成的PDF文件
        Response.ContentType = "application/pdf";
        Response.AppendHeader("Content-Disposition", "attachment;filename=GridView.pdf");
        Response.TransmitFile("GridView.pdf");
        Response.End();
    }

    private void BindGridView()
    {
        // 绑定数据到GridView
        // ...
    }

    public override void VerifyRenderingInServerForm(Control control)
    {
        // 验证控件渲染
    }
}