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I am developing an asp.net c# web application in which i am using itextsharp to generate pdf from html content on the page.

I have written the pdf generating code inside a c# webservice
this is the code
ASP.NET
<div class="childbody_container corner-val">
 <div class="childheadtag corner-val bg-color">
 <span class="white-text font-val">
  <asp:Label ID="articleTitle" runat="server" Text="Article title"></asp:Label>
 </span>
</div>
<div class="child-content">
 <div id="articleText" style="min-height: 300px;"  runat="server">
</div>
<div id="articleDetails">
 <div class="articledownload bg-color">
  <a id="articlelink" class="articledownloadlink" href="#" target="_blank"  runat="server" download>download</a>
 </div>
 <h3>Article Details : </h3>
 <h3>Authors</h3>
 <div id="articleAuthor" style="min-height: 10px;"></div>
 <h3>Category</h3>
 <div id="articleCategory" style="min-height: 10px;"></div>
 <h3>Tag</h3>
 <div id="articleTag" style="min-height: 10px;"></div>
</div>
</div>
</div>

JavaScript
$('a#articlelink').on('click', function () {
 var filename = JSON.stringify(readCookie('winuname'));

  var articletitle = $(document).find('#articleTitle').text();
  var articletext = $(document).find('div#articleText').html();
  var articledetails = JSON.stringify($(document).find('div#articleDetails').html());
  var htmlcontent = '<div style="color:#ffffff; text-align:center; background-color:#4F9EC9; width:100%;">' + articletitle + '</div><br/><br/>' + articletext;
                
  var param = 'filename : ' + filename + ',HtmlContent : ' + htmlcontent;
  $.ajax({
  type: "POST",
  url: "../MyWebService.asmx" + "/" + "GenerateArticlePDF",
  data: "{" + param + "}",
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function () { alert('PDF generated successfully.'); },
  error: function () { alert('PDF generation failed.'); }
 });
});


this is the webservice code
C#
using iTextSharp.text;
using System.IO;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.pdf;

[WebMethod(Description = "Article PDF Generate")]
    [ScriptMethod(ResponseFormat = ResponseFormat.Xml)]
    public void GenerateArticlePDF(string filename,string HtmlContent)
    {
        try
        {
            HttpContext.Current.Response.ContentType = "application/pdf";
            HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + filename + ".pdf");
            HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
            StringWriter sw = new StringWriter();
            //HtmlTextWriter hw = new HtmlTextWriter(sw);
            //articleText.RenderControl(hw);
            StringReader sr = new StringReader(HtmlContent.ToString());
            Document pdfDoc = new Document(PageSize.LETTER, 15f, 15f, 15f, 15f);
            HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
            PdfWriter.GetInstance(pdfDoc, HttpContext.Current.Response.OutputStream);
            pdfDoc.Open();
            htmlparser.Parse(sr);
            pdfDoc.Close();
            HttpContext.Current.Response.Write(pdfDoc);
            HttpContext.Current.Response.End();
        }
        catch (Exception ex)
        {

        }
    }


I get the following error
{"Message":"Invalid JSON primitive: .","StackTrace":"   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject()\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeDictionary(Int32 depth)\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[T](String input)\r\n   at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext context, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n   at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.ArgumentException"}


Please point out what i am doing wrong here

What I have tried:

I am using itextsharp core 5.5.8 to generate pdf
Posted
Updated 2-Mar-16 23:56pm

1 solution

You're missing quotes around the string values in your JSON object.

Try something like this:
JavaScript
$('a#articlelink').on('click', function () {
 var filename = readCookie('winuname');
 
  var articletitle = $(document).find('#articleTitle').text();
  var articletext = $(document).find('div#articleText').html();
  var articledetails = JSON.stringify($(document).find('div#articleDetails').html());
  var htmlcontent = '<div style="color:#ffffff; text-align:center; background-color:#4F9EC9; width:100%;">' + articletitle + '</div><br /><br />' + articletext;
                
  var param = { filename: filename, HtmlContent: htmlcontent };
  
  $.ajax({
    type: "POST",
    url: "../MyWebService.asmx" + "/" + "GenerateArticlePDF",
    data: JSON.stringify(param),
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function () { alert('PDF generated successfully.'); },
    error: function () { alert('PDF generation failed.'); }
 });
});
   
v2
Comments
Christopher Fernandes 3-Mar-16 6:16am
   
I tried it doesn't work
Richard Deeming 3-Mar-16 6:33am
   
And the error is?
Christopher Fernandes 3-Mar-16 6:57am
   
{"Message":"Invalid object passed in, \u0027:\u0027 or \u0027}\u0027 expected. (1409): {\"filename : Test,HtmlContent : \u003cdiv style=\\\"color:#ffffff; text-align:center; background-color:#4F9EC9; width:100%;\\\"\u003eTest\u003c/div\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cdiv\u003e\u003cp\u003eChristopher\u003c/p\u003e\\n\\n\u003cp\u003e\u0026nbsp;\u003c/p\u003e\\n\\n\u003cp\u003eChristopher\u003c/p\u003e\\n\\n\u003cp\u003e\u003cimg alt=\\\"\\\" src=\\\"../cklibrary/images/mud-sling.png\\\" style=\\\"height:261px; width:650px\\\"\u003e\u003c/p\u003e\\n\\n\u003cp\u003eTest\u003c/p\u003e\\n\\n\u003cp\u003e\u0026nbsp;\u003c/p\u003e\\n\\n\u003cp\u003echristopher\u003c/p\u003e\\n\\n\u003ctable border=\\\"1\\\" cellpadding=\\\"1\\\" cellspacing=\\\"1\\\" style=\\\"width:200px\\\"\u003e\\n\\t\u003ctbody\u003e\\n\\t\\t\u003ctr\u003e\\n\\t\\t\\t\u003ctd\u003eFirst Name\u003c/td\u003e\\n\\t\\t\\t\u003ctd\u003eLast Name\u003c/td\u003e\\n\\t\\t\u003c/tr\u003e\\n\\t\\t\u003ctr\u003e\\n\\t\\t\\t\u003ctd\u003eChristopher\u003c/td\u003e\\n\\t\\t\\t\u003ctd\u003eFernandes\u003c/td\u003e\\n\\t\\t\u003c/tr\u003e\\n\\t\\t\u003ctr\u003e\\n\\t\\t\\t\u003ctd\u003eCalvin\u003c/td\u003e\\n\\t\\t\\t\u003ctd\u003eFernandes\u003c/td\u003e\\n\\t\\t\u003c/tr\u003e\\n\\t\u003c/tbody\u003e\\n\u003c/table\u003e\\n\\n\u003cp\u003e\u0026nbsp;\u003c/p\u003e\\n\u003c/div\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cdiv\u003e\\n \u003cdiv class=\\\"articledownload bg-color\\\"\u003e\\n \u003ca id=\\\"articlelink\\\" class=\\\"articledownloadlink\\\" target=\\\"_blank\\\" download=\\\"\\\"\u003edownload\u003c/a\u003e\\n \u003c/div\u003e\\n \u003ch3\u003e\u003cu\u003eArticle Details : \u003c/u\u003e\u003c/h3\u003e\\n \u003ch3\u003eAuthors\u003c/h3\u003e\\n \u003cdiv id=\\\"articleAuthor\\\" style=\\\"min-height: 10px;\\\"\u003eChristopher Fernandes, Claire Cylkowski\u003c/div\u003e\\n \u003ch3\u003eCategory\u003c/h3\u003e\\n \u003cdiv id=\\\"articleCategory\\\" style=\\\"min-height: 10px;\\\"\u003edefault-category\u003c/div\u003e\\n \u003ch3\u003eTag\u003c/h3\u003e\\n \u003cdiv id=\\\"articleTag\\\" style=\\\"min-height: 10px;\\\"\u003edefault-tag\u003c/div\u003e\\n \u003c/div\u003e\u003cbr/\u003e\"}","StackTrace":" at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeDictionary(Int32 depth)\r\n at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[T](String input)\r\n at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext context, JavaScriptSerializer serializer)\r\n at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.ArgumentException"}
Richard Deeming 3-Mar-16 7:04am
   
You must have missed something, because the value you're passing to the AJAX call doesn't have quotes around the filename value. If you'd used the code that I posted, that wouldn't happen.
Christopher Fernandes 3-Mar-16 7:18am
   
Thanks, I had missed the param changes
Christopher Fernandes 3-Mar-16 9:41am
   
Now the PDF generated does not get downloaded
Richard Deeming 27-May-20 5:59am
   
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