Using RtfFormatProvider
RtfFormatProvider makes it easy to import and export RadDocument to/from RTF format, preserving the entire document structure and formatting.
All you have to do in order to use RtfFormatProvider is to add a reference to Telerik.Windows.Documents.FormatProviders.Rtf.dll.
Import
In order to import an RTF document, you need to use the Import() method of RtfFormatProvider.
The code from Example 1 shows how to use RtfFormatProvider to import an RTF document from a file.
Example 1: Import document from a file
RtfFormatProvider provider = new RtfFormatProvider();
using (Stream input = File.OpenRead("Sample.rtf"))
{
RadDocument document = provider.Import(input);
}And here is how you can import a document from string containing the RTF document:
Example 2: Import document from a string
RtfFormatProvider provider = new RtfFormatProvider();
RadDocument document = provider.Import(input);The resulting RadDocument can be used like any code-generated document.
Export
In order to export a document to RTF, you need to use the Export() method of RtfFormatProvider.
Example 3 shows how to use RtfFormatProvider to export RadDocument to a file.
Example 3: Export a document to a file
RtfFormatProvider provider = new RtfFormatProvider();
using (Stream output = File.Create("sample.rtf"))
{
RadDocument document = CreateRadDocument();
provider.Export(document, output);
}You can also export the document to a string and preserve it in a database.
Example 4: Export a document to a string
RtfFormatProvider provider = new RtfFormatProvider();
RadDocument document = CreateRadDocument();
string output = provider.Export(document);The resulting documents can be opened in any application that supports RTF documents.
owever, the format providers cannot be used in XAML and you have to implement a logic that will call their Import() and Export() methods. This is something that you might not want to be concerned with when using RadRichTextBox in a data bound scenarios. For such cases, the DataProvider classes are used. They wrap the FormatProviders' functionality and allow its usage in XAML.