PrintPreview() method in RichTextBox

[Anthony]

As in an example 

Dim instance As RadRichTextBox
 
instance.PrintPreview()
I am trying to print preview my current page , but runtime get an exception
System.InvalidOperationException was unhandled by user code
  Message=There is no DocumentFormatProvider which supports html
  StackTrace:
       at Telerik.Windows.Controls.RadRichTextBox.HtmlPrint(String title, Boolean preview)
       at Telerik.Windows.Controls.RadRichTextBox.PrintPreview()
       at SilverlightApplication1.MainPage.Button1_Click(Object sender, RoutedEventArgs e)
       at System.Windows.Controls.Primitives.ButtonBase.OnClick()
       at System.Windows.Controls.Button.OnClick()
       at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
       at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
       at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)
  InnerException:
Did anybody meet it? and how to fix it up?
System.InvalidOperationException was unhandled by user code
  Message=There is no DocumentFormatProvider which supports html
  StackTrace:
       at Telerik.Windows.Controls.RadRichTextBox.HtmlPrint(String title, Boolean preview)
       at Telerik.Windows.Controls.RadRichTextBox.PrintPreview()
       at SilverlightApplication1.MainPage.Button1_Click(Object sender, RoutedEventArgs e)
       at System.Windows.Controls.Primitives.ButtonBase.OnClick()
       at System.Windows.Controls.Button.OnClick()
       at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
       at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
       at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)
  InnerException: 

System.InvalidOperationException was unhandled by user code
  Message=There is no DocumentFormatProvider which supports html
  StackTrace:
       at Telerik.Windows.Controls.RadRichTextBox.HtmlPrint(String title, Boolean preview)
       at Telerik.Windows.Controls.RadRichTextBox.PrintPreview()
       at SilverlightApplication1.MainPage.Button1_Click(Object sender, RoutedEventArgs e)
       at System.Windows.Controls.Primitives.ButtonBase.OnClick()
       at System.Windows.Controls.Button.OnClick()

System.InvalidOperationException was unhandled by user code
  Message=There is no DocumentFormatProvider which supports html
  StackTrace:
       at Telerik.Windows.Controls.RadRichTextBox.HtmlPrint(String title, Boolean preview)
       at Telerik.Windows.Controls.RadRichTextBox.PrintPreview()
       at SilverlightApplication1.MainPage.Button1_Click(Object sender, RoutedEventArgs e)
       at System.Windows.Controls.Primitives.ButtonBase.OnClick()
       at System.Windows.Controls.Button.OnClick()
       at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
       at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
       at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)
  InnerException:

[Ivailo Karamanolev]

Hello Anthony,

The PrintPreview method uses HTML to show the document in a newly opened window. Therefore, it needs an implementation of a format provider which exports to HTML. All you need to do is add a reference to the Telerik.Windows.Documents.FormatProviders.Html.dll assembly and the exception should go away.

Kind regards,
Ivailo
the Telerik team

[Raphael]

Hi Iva!

I'm having the same problem but I'm using the Telerik.Windows.Documents.FormatProviders.Html.dll.

I add the dll on Xaml and Xaml.cs but the Html print and PrintPreview are not working.

Can you help me,please?

Kind Regards,
Raphael.

[Iva Toteva]

Hello Raphael,

Are you getting an exception of some kind or just nothing happens?
You could double-check if all references in your Silverlight project point to the folder with the latest assemblies. The ones you need in order to utilize the printing are:

• Telerik.Windows.Documents;
• Telerik.Windows.Documents.FormatProviders.Html.

If you do not find the cause of the problem, would it be possible for you to reproduce the issue in a small demo and send it over in a support ticket?

Kind regards,
Iva
the Telerik team