Hello Dhavalesh,
I'll get straight to your questions:
#1 Rich text copy/paste can only be done in one document or between two instances of RadRichTextBox in the same application. This is a limitation of Silverlight's clipboard, which we can do nothing about. Rich text copy/paste works correctly with the WPF version of the control, because the framework allows it.
#2 The current position of the caret can be obtained like this:
More information on DocumentPositions can be found
here.
#3 RadRichTextBox always shows a Document. However, depending on the behavior you wish to achieve, you can follow one of the following approaches:
1. Set the Width and Height of the control to 0 or the visibility of the control to Collapsed/Hidden.
2. If you are using RadRichTextBoxRibbonUI or some other UI bound to commands of the editor, you can assign a new empty document to the editor and set the IsReadOnly property to true. Thus, all UI commands will be disabled, except for the save document command. You can bind the button to a custom command instead of the default SaveCommand. The same goes for the OpenDocumentCommand, which will be disabled by the fact that the rich text box is read only.
Regards,
Iva
the Telerik team
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