Itextsharp导出为pdf NullReferenceException [英] Itextsharp export to pdf NullReferenceException
本文介绍了Itextsharp导出为pdf NullReferenceException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试将aspx页面导出为pdf。我在Button2_Click上使用此代码，但我在htmlworker.Parse（str）上采用System.NullReferenceException;：
I am trying to export the aspx page to pdf. I am using this code on Button2_Click, but i take a System.NullReferenceException on htmlworker.Parse(str);:
string attachment = "attachment; filename=Article.pdf";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/pdf";
StringWriter stw = new StringWriter();
HtmlTextWriter htextw = new HtmlTextWriter(stw);
dvText.RenderControl(htextw);
Document document = new Document();
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);
Response.End();
推荐答案
您的HTML是否包含< ; hr> 标签？ HTMLworker不支持它。
Does your HTML contain <hr> tag? It's not supported in HTMLworker.
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