在asp.net页面中生成pdf

问题描述：

我需要在asp.net页面中生成pdf页面，该页面包含我搜索过的内容占位符，并尝试了以下代码，但其显示错误是这样的.

>>>扩展程序控件"Search"不是已注册的扩展程序控件.在调用RegisterScriptDescriptors()之前，必须使用RegisterExtenderControl()注册扩展程序控件.
参数名称:extenderControl<<<<

在这段代码中我在此行中出错

Hi,

I need to generate pdf in asp.net page the page contain contentplaceholder i googled and tried the below code but its showing error like this.

>>>Extender control ''Search'' is not a registered extender control. Extender controls must be registered using RegisterExtenderControl() before calling RegisterScriptDescriptors().
Parameter name: extenderControl <<<<

in this code im getting error in this line

this.Page.RenderControl(hw);

//code//
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();

答

public void ProcessRequest(HttpContext context)
{
   int newsId = int.Parse(context.Session["newsId"].ToString());
   int FK_UnitId = int.Parse(context.Session["UserData"].ToString());
   string dirPathForTextFiles =  ConfigurationManager.AppSettings.GetValues("ThePath").First() + "/" + "NewsTextFiles" + "/" + "UnitNum" + FK_UnitId.ToString() + "_" + "NewsNum" + newsId + "/";
   DataTable UpdatedDateTable = (DataTable)context.Session["theLastUpdatedTextFile"];
   UpdatedDateTable.AcceptChanges();
   context.Session.Add("currentTextFile", UpdatedDateTable);
   List<string> l = new List<string>(UpdatedDateTable.Rows.Count);

   try
   {

      l.Add(dirPathForTextFiles + UpdatedDateTable.Rows[0]["fileName"].ToString());
       context.Response.ContentType = getContentType(dirPathForTextFiles + UpdatedDateTable.Rows[0]["fileName"].ToString());
       using (FileStream fs = new FileStream(l[0], FileMode.Open, FileAccess.Read))
       {
          long chunkSize = fs.Length;
          byte[] buf = new byte[chunkSize];
          int bytesRead = 1;
          bytesRead = fs.Read(buf, 0,(int)chunkSize);
          if (bytesRead > 0) context.Response.OutputStream.Write(buf, 0, buf.Length);
          context.Response.OutputStream.Flush();
      }

  }
  catch (IOException e)
  {
     string message = e.Message;
  }
}

请参阅下面的链接.可能会对您有帮助.

http://www.developerfusion.com/code/5682/create -pdf-files-on-fly-in-c/ [使用C#2.0创建PDF文件的教程 [ ^ ]

谢谢，
Viprat

Hi,

See the below link. It might be help you.

http://www.developerfusion.com/code/5682/create-pdf-files-on-fly-in-c/[^]
Tutorials on creating PDF files using C# 2.0[^]

Thanks,
Viprat

在asp.net页面中生成pdf

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