文件已损坏且无法修复

Question

string attachment = "attachment; filename=" + filename + ".pdf"; 
    Response.ClearContent(); 
    Response.AddHeader("content-disposition", attachment);
    Response.ContentType = "application/pdf";
    StringWriter stw = new StringWriter();
    HtmlTextWriter htextw = new HtmlTextWriter(stw);
    htextw.AddStyleAttribute("font-size", "7pt");
    htextw.AddStyleAttribute("color", "Black");
    Panel_Name.RenderControl(htextw);// .RenderControl(htextw);
    //Name of the Panel 
    Document document = new Document();
    document = new Document(PageSize.A4, 5, 5, 15, 5);
    FontFactory.GetFont("Arial", 50, iTextSharp.text.BaseColor.BLUE);
    PdfWriter.GetInstance(document, Response.OutputStream);
    document.Open();
    StringReader str = new StringReader(stw.ToString());
    HTMLWorker htmlworker = new HTMLWorker(document);
    htmlworker.Parse(str);
    document.Close();
    Response.Write(document);

I have return this code to generate pdf of an aspx page(ie Default.aspx to Default.pdf). It generates a pdf file but the pdf file generated is not supported I have the latest version of pdf. It gives an error of opening the document. The File is damaged and cannot be repaired.

Answer 1

You need to download ITextSharp and add its reference to your project. ITextSharp is a free HTML to PDF Library. You can download it using the following download link.

HTML Markup

<form id="form1" runat="server">
    <div>
       <img src = "//www.aspsnippets.com/images/Blue/Logo.png" /><br />
    </div>
    <div style = "font-family:Arial">This is a test page</div>
    <div>
       <table border = "1" width = "100">
          <tr><td>Name</td><td>Age</td></tr>
          <tr><td>John</td><td>11</td></tr>
          <tr><td>Sam</td><td>13</td></tr>
          <tr><td>Tony</td><td>12</td></tr>
       </table>
    </div>
    <div>
       <asp:Button ID="btnExport" runat="server" Text="Export" onclick="btnExport_Click" />
    </div>
</form>

Namespaces

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

C# Code

protected void btnExport_Click(object sender, EventArgs e)
{
    Response.ContentType = "application/pdf";
    Response.AddHeader("content-disposition", "attachment;filename=TestPage.pdf");
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    this.Page.RenderControl(hw);
    StringReader sr = new StringReader(sw.ToString());
    Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
    HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
    PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
    pdfDoc.Open();
    htmlparser.Parse(sr);
    pdfDoc.Close();
    Response.Write(pdfDoc);
    Response.End();
}

Answer 2

You can use the third party library to create pdf such as PDFizer