iTextSharp在htmlWorker.Parse上生成InvalidCastException(iTextSharp generating InvalidCastException on htm

iTextSharp在htmlWorker.Parse上生成InvalidCastException(iTextSharp generating InvalidCastException on htmlWorker.Parse)

当试图将GridView转换为PDF时，我在线上使用iTextSharp时收到InvalidCastException

htmlWorker.Parse(stringReader)

我究竟做错了什么？我搜索过，每个人似乎都是这样做的。这是错误。

无法将“iTextSharp.text.html.simpleparser.CellWrapper”类型的对象强制转换为“iTextSharp.text.Paragraph”。

这是我的iTextSharp包含

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

这是我的代码。

public override void VerifyRenderingInServerForm(Control control) { } protected void LinkButton2_Click(object sender, EventArgs e) { Response.ClearContent(); Response.ContentType = "application/pdf"; Response.AddHeader("content-disposition", "attachment; filename=PDFDoc.pdf"); Response.Cache.SetCacheability(HttpCacheability.NoCache); StringWriter stringWriter = new StringWriter(); HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter); GridView1.RenderControl(htmlTextWriter); StringReader stringReader = new StringReader(stringWriter.ToString()); Document pdfDoc = new Document(PageSize.LETTER, 10f, 10f, 10f, 0f); HTMLWorker htmlWorker = new HTMLWorker(pdfDoc); PdfWriter.GetInstance(pdfDoc, Response.OutputStream); pdfDoc.Open(); htmlWorker.Parse(stringReader); pdfDoc.Close(); Response.Write(pdfDoc); Response.End(); }

When attempting to turn a GridView into a PDF I am getting an InvalidCastException when using iTextSharp on the line

htmlWorker.Parse(stringReader)

What am I doing wrong? I searched and everyone seems to do this the same way. Here is the error.

Unable to cast object of type 'iTextSharp.text.html.simpleparser.CellWrapper' to type 'iTextSharp.text.Paragraph'.

Here are my includes for iTextSharp

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

Here is my code.

public override void VerifyRenderingInServerForm(Control control) { } protected void LinkButton2_Click(object sender, EventArgs e) { Response.ClearContent(); Response.ContentType = "application/pdf"; Response.AddHeader("content-disposition", "attachment; filename=PDFDoc.pdf"); Response.Cache.SetCacheability(HttpCacheability.NoCache); StringWriter stringWriter = new StringWriter(); HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter); GridView1.RenderControl(htmlTextWriter); StringReader stringReader = new StringReader(stringWriter.ToString()); Document pdfDoc = new Document(PageSize.LETTER, 10f, 10f, 10f, 0f); HTMLWorker htmlWorker = new HTMLWorker(pdfDoc); PdfWriter.GetInstance(pdfDoc, Response.OutputStream); pdfDoc.Open(); htmlWorker.Parse(stringReader); pdfDoc.Close(); Response.Write(pdfDoc); Response.End(); }