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 references 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

• C#

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

• C#

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

• C#

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

• C#

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.

However, 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.