How to printpreview contents of RadTextbox?

[Brendan]

In my app a use can load a text file in a radTextbox (logs, etc.)  I want to print/preview the contents but get this error;

    "Unable to cast object of type 'Telerik.WinControls.UI.RadTextBox' to type 'Telerik.WinControls.UI.IPrintable'."

I presume the RadPrintDocument cannot handle this type of control.  Is there anyway to do this or any other rad control I could use to load the contents of a text file that would work with the RadPrintDocument/print preview feature

[Brendan]

I achieved what I want through the .net controls, thanks.

[Ivan Petrov]

Hello Brendan,

Thank you for writing.

The error you get is caused by the fact that all objects assigned to the AssociatedObject property of RadPrintDocument must implement the IPrintable interface. This is the interface through which the object and the print document communicate. If you want to pass a RadTextBox to the RadPrintDocument you will have to create a class that inherits from the text box class and implements the IPrintable interface.

I hope this will be useful. Should you have further questions, do not hesitate to write back.

Regards,
Ivan Petrov
the Telerik team