Converting Asp.net Webpage to PDF using Itextsharp

santosh kumar

8y3.7k.NET

I get the below error while converting asp.net webpage to pdf

Script control 'UpdateProgress1' is not a registered script control. Script controls must be registered using RegisterScriptControl() before calling RegisterScriptDescriptors().

Code behind file as below:

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);(Exception occurs here)

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();

}

Attached the codebehind and aspx pages.

Request you to help me in finding the sloution

Thanks and Regards,

Santosh Kumar

10 Replies

Know the answer? Post it — somebody with the same question will find it here.

Gajendra Jangid7y ago
Hello Santosh,

Add following dll using nuget:
Install-Package HtmlRenderer.PdfSharp -Version 1.5.0.6
and use following code:
public static void PdfSharpConvert(String html)
   {
       string pdfpath = @"F:\OLD DATA\ConsoleApplication1\ConsoleApplication1\bin\Debug\Images.pdf";
       var pdf = TheArtOfDev.HtmlRenderer.PdfSharp.PdfGenerator.GeneratePdf(html, PdfSharp.PageSize.A4);
       pdf.Save(pdfpath);
}
0
Leon D8y ago
You can try to use Spire.Doc to convert aspx page to pdf. The code is like the following:
Document document = new Document();
            using (MemoryStream buffer = new MemoryStream())
            {
                using (TextWriter writer = new StreamWriter(buffer, Encoding.UTF8))
                {
                    using (HtmlTextWriter htmlWriter = new HtmlTextWriter(writer))
                    {
                        this.RenderControl(htmlWriter);
                        htmlWriter.Flush();
                        writer.Flush();
                        buffer.Position = 0;

                        string stylesheet = "Default.css";
                        using (StreamReader reader = new System.IO.StreamReader(buffer, Encoding.UTF8))
                        {
                            String baseHref = Request.Url.AbsoluteUri;
                            document.LoadHTML(reader, baseHref, Spire.Doc.Documents.XHTMLValidationType.None);
                            document.HtmlExportOptions.CssStyleSheetType = CssStyleSheetType.External;
                            document.HtmlExportOptions.CssStyleSheetFileName = stylesheet;
                            document.SaveToFile("Test.pdf", Spire.Doc.FileFormat.PDF, Response, HttpContentType.Attachment);
                        }
                    }
                }
            }
+1
santosh kumar8y ago
Hi Manav,

Done the changes as you mentioned but still getting the same error.

Thanks
+1
Manav Pandya8y ago
Hello

Type following line in OnPrerender method :
base.OnPreRender(e);
It may occur also if scriptmanager is not placed properly :

Add scriptmanager in oninit event of webpart

Thanks
0
santosh kumar8y ago
Hi Manav,

Yes, even tried by keeping these 3 lines of code in button_click event.

But still getting the same error

ScriptControl UpdateProgress1 is not registered.

Thanks
+1
Manav Pandya8y ago
Hello

Try to put inside button click event if possible

Thanks
0
santosh kumar8y ago
Hi Manav,

When I add the below three lines in page_load event

ScriptManager sm = ScriptManager.GetCurrent(Page);

sm.RegisterScriptControl(UpdateProgress1);

UpdateProgress1.Visible = true;

I am getting the below error

Script controls may not be registered before PreRender.

So added it under OnPrerender event but then the same error

UpdateProgress1 Control is not registered error comming.

Am i missing any thing.

If possible please check my code behind and aspx pages attached to this post

Thanks

+1
Manav Pandya8y ago
Hello

You can write this within pageload event , so that it will register before you use it

Thanks
0
santosh kumar8y ago
Hi Manav,

Where exactly i need to add these 2 lines of code .

Do i need to add these lines in button_click functionality of my .cs file?

Thanks
+1
Manav Pandya8y ago
Hello

Following code working for me :
ScriptManager sm = ScriptManager.GetCurrent(Page);
sm.RegisterScriptControl(control_name);
Than make it visible :
control_name.Visible = true;
Thanks
0