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HtmlTextBox question

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Dave Hayward asked on 12 Jun 2011, 04:05 PM

I'm trying to place html into an HtmlTextBox and I'm getting the error:

"An error has occurred while processing HtmlTextBox 'htmlTextBox1'.
unexpected DTD declaration. Line 1 Position 9."

This message is rendered in the report.

The html being placed is :

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<A

href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd%22%20originalAttribute=%22href%22%20originalPath=%22"

xhtml1-transitional.dtd?? DTD xhtml1 TR www.w3.org

http:><HTML'>http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html</A>

xmlns="<A

href="http://www.w3.org/1999/xhtml%22%20originalAttribute=%22href%22%20originalPath=%22"

www.w3.org http: xhtml??

1999><META'>http://www.w3.org/1999/xhtml"><head><meta</A>

http-equiv="Content-Type" content="text/html; charset=utf-8"

/><title>Untitled</title><style

type="text/css"><BR>.p_778AAEB1 { margin: 0px 0px 10px 0px;text-align:

left;text-indent: 0pt;padding: 0px 0px 0px 0px; } <BR>.s_E6FD2046 { font-family:

'Verdana';font-style: Normal;font-weight: normal;font-size: 16px;color: #000000;

} <BR></style></head><body><p

class="p_778AAEB1"><span

class="s_E6FD2046">Some Sample Text</span></p></body></html><BR>

This html was actually generated by the Telerik Silverlight 'MSWordEditor' and then converted as follows:

public string RadDocumentToString(RadDocument doct)

{

IDocumentFormatProvider htmlProvider = DocumentFormatProvidersManager.GetProviderByExtension(".html");

byte[] buffer = htmlProvider.Export(doct);

UTF8Encoding utf8 = new UTF8Encoding();

string text = utf8.GetString(buffer, 0, buffer.Length);

return text;

}

Does anyone have an idea of what might be happening?

TIA

7 Answers, 1 is accepted

answered on 13 Jun 2011, 12:25 PM

Hi Dave Hayward,

First of all, you don't need to do any additional processing to the exported document, as the Export method of HtmlFormatProvider returns a string. The following code will be sufficient:

public string RadDocumentToString(RadDocument doct)

{

HtmlFormatProvider htmlProvider = DocumentFormatProvidersManager.GetProviderByExtension(".html") as HtmlFormatProvider;

string text = htmlProvider.Export(doct);

return text;

}

With regard to the issue in your post, unfortunately the HTML that HtmlFormatProvider exports is not fully compatible with the HTML that HtmlTextBox recognizes. The list of supported tags in HtmlTextBox can be found here and the customization possibilities of the HtmlFormatProvider are described in this article. Maximum compatibility is achieved by setting the DocumentExportLevel to Fragment ad StylesExportMode to Inline, but there are other issues that cannot be worked around, namely the recognition of Bold and Underlined parts of the document.
If you would be showing the exported document in a report, we can send you the source code of RadRichTextBox and HtmlFormatProvider, so that you can create a custom HTML format provider that will be compatible with HtmlTextBox. In that case, please open a support ticket requesting the source code.
We will try to make HtmlTextBox and RadRichTextBox compatible as soon as possible, but the time frame is still not certain.

Greetings,
Iva
the Telerik team

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answered on 16 Oct 2012, 09:35 AM

Hello Christian,

I am afraid I don't understand what problem you are observing.

This thread mainly discusses the interoperability between RadRichTextBox for Silverlight and HtmlTextBox for Reporting. The information is rather outdated and as you can see from the PITS issue, we have made some progress on this matter introducing export settings for RadRichTextBox's HtmlFormatProvider. These settings allow the export of the document in a way that achieves best compatibility with the HtmlTextBox from Reporting. You can read more about this here.

There are, however, some limitations that cannot be solved by export settings, because the HtmlTextBox does not support particular features - for example, paragraphs cannot have spacing after different than the default one. More information on the supported tags in the control is available in this article.

Please, check if using these settings is sufficient for the requirements of your application thoroughly before deciding on the components you will use in your application.

Regards,
Mihail
the Telerik team

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