HTML to RTF string conversion in VB.NET
Question
I have a jquery Rich Textbox editor ( http://jqueryte.com/ ) which allows the end user to fill in their content to generate a word document report.
The process is as following:
User fills in the content --> Saving the HTML of the Richtext box content into the database. --> Pull the stored HTML content from the database and convert it into an RTF string for it to be opened in Microsoft Word.
I tried converting the HTML to an RTF ( a function that would take in my HTML string and give out the equivalent RTF string) but it was getting too complicated to manipulate all the HTML tags. I searched a lot but couldn't find any solution (except not a free one at least) for the problem.
Any help would be greatly appreciated.
Thanks in Advance.
1 answers
solution1
0 2015-08-21 15:15:32
One option is to use the MS Office Word Interop (although frowned upon by some)...
string html = "<html><head><style>p{margin:0}</style></head><body style=\"font-family:Arial;\">" + value.Replace("<p> </p>", "<p><br></p>") + "</body></html>";
byte[] htmlBytes = Encoding.UTF8.GetBytes(html);
string htmlPath = Path.GetTempFileName() + ".html";
string rtfPath = htmlPath.Replace(".html", ".rtf");
FileStream fs = new FileStream(htmlPath, FileMode.Create, FileAccess.Write);
fs.Write(htmlBytes, 0, htmlBytes.Length);
fs.Close();
Application word = new Application();
Document doc = word.Documents.Open(htmlPath);
doc.SaveAs(rtfPath, WdSaveFormat.wdFormatRTF);
doc.Close();
word.Quit();
fs = new FileStream(rtfPath, FileMode.Open, FileAccess.Read);
byte[] rtfBytes = new byte[fs.Length];
fs.Read(rtfBytes, 0, rtfBytes.Length);
fs.Close();
string rtf = Encoding.ASCII.GetString(rtfBytes);
Thread thread = new Thread(() =>
{
RichTextBox rtb = new RichTextBox();
rtb.Rtf = rtf;
rtf = rtb.Rtf;
});
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join();
return rtf;
The reason I have used a RichTextBox as well as Word is that Word's RTF files are extremely bulky... when Word's RTF data is fed into a RichTextBox it filters out all the unneeded code.
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