在C# WebApp中显示PDF文档时出错

// 确保文件路径正确
string filePath = Server.MapPath("~/Documents/example.pdf");

// 检查文件是否存在
if (File.Exists(filePath))
{
    // 使用PdfViewer控件或其他库加载PDF文件
    Response.ContentType = "application/pdf";
    Response.TransmitFile(filePath);
}
else
{
    // 处理文件不存在的情况
    Response.Write("文件不存在");
}

using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

public partial class GeneratePDF : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-disposition", "attachment;filename=example.pdf");

        Document document = new Document();
        PdfWriter.GetInstance(document, Response.OutputStream);

        document.Open();
        document.Add(new Paragraph("Hello World!"));
        document.Close();
    }
}