WkHtmlToPdfConverter - Error

Question

        Try
            Dim myByteArray() As Byte

            Using myHTMLToPDF As New Agresso.Students.HtmlToPDFCpnvertor.WkHtmlToPdfConverter()
                myByteArray = myHTMLToPDF.Convert(myHTML)
                myHTMLToPDF.Dispose()
            End Using

            Dim myOutputData As String = Path.GetTempPath + DateTime.Now.ToShortDateString().Replace("/", "_") + DateTime.Now.ToShortTimeString().Replace(":", "_") + DateTime.Now.Second.ToString() + ".PDF"
            Using myStream As New System.IO.FileStream(myOutputData, System.IO.FileMode.Create)
                myStream.Write(myByteArray, 0, myByteArray.Length)
                myStream.Close()
                myStream.Dispose()
            End Using
            Return myOutputData
        Catch
        End Try

Hi Guys,

I am using the above code to generate a PDF document based on a specific html string.  The code works perfectly for the first time, however when I run the same code for the second time it generates a PDF document which has all the html formatting removed.  The second PDf produced only ocontains one large block of text.

I assume there is a problem disposing of the object after the first use?  has anyone else had a similar problem with this?

Thank you and eagerly await your reply.

Kelvin

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Kind regards, Kelvin

Answer 1

Hi Kelvin,

I am moving your thread into the Visual Basic General Forum for dedicated support.
Have a nice day,

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Leo Liu [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Hi Kelvin,

Your code didn't show how do you convert the html text to PDF. 

Anyway, please take a look at this similar thread about how to convert html to PDF

http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/86e4cbee-17ef-47cd-b476-30e8ae053d1d/ 

And here is another code project: http://www.codeproject.com/Articles/7089/Generate-PDF-documents-from-a-HTML-page-using-ASP Although it is a asp.net sample, but the function of this topic is also available in Windows Form. And this online translate tools can help you to convert the C# code to  VB. If you have any further concerns, please feel free to follow up.

I hope this will be helpful.

Best regards,

---

Mike Feng
MSDN Community Support | Feedback to us
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 3

Hi Kevin,

I don't hear from you a couple of days.

Do you have any update?

How about your issue now?

Best regards,

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Mike Feng
MSDN Community Support | Feedback to us
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 4

 Mike,

Sorry for the late reply, I jave been busy (and to be honest I forgot :( ).  To resolve the issue above I changed the cod3e to the following:

    Public Function GenerateHardcopyPDF(ByVal myHTML As String) As String
        Try
            Dim myByteArray() As Byte
            'Dim myHTMLToPDF As New Agresso.Students.HtmlToPDFCpnvertor.WkHtmlToPdfConverter()
            Dim myHTMLToPDF As IHtmlToPdfConverter = New MultiplexingConverter()
            myHTMLToPDF.ObjectSettings.Load.LoadErrorHandling = Agresso.Students.HtmlToPDFCpnvertor.LoadErrorHandlingType.ignore
            myByteArray = myHTMLToPDF.Convert(myHTML)
            Dim myOutputData As String = Path.GetTempPath + DateTime.Now.ToShortDateString().Replace("/", "_") + DateTime.Now.ToShortTimeString().Replace(":", "_") + DateTime.Now.Second.ToString() + ".PDF"
            Using myStream As New System.IO.FileStream(myOutputData, System.IO.FileMode.Create)
                myStream.Write(myByteArray, 0, myByteArray.Length)
                myStream.Close()
                myStream.Dispose()
            End Using
            Return myOutputData
        Catch
        End Try
    End Function

This resolved the issue :)

Thank you for your help.

Kelvin

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Kind regards, Kelvin

Answer 5

Kevin, 

And you took that DLL from a link from Mike, then pleas tell which link, mark the reply from Mike as answer and also yours.

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Success
Cor