Is it possible to use RadMaskedTextBox inside an AutoCompleteBox in Silverlight / Expression Blend?

Question

It's probably doable, but with my n00b skills I couldn't figure this out yet.

When I try to "Make Into Part" on the RadMaskedTextBox, Expression Blend complains that it's not a TextBox.

How can I make it to use it as a proper control part? Can I "typecast" somehow in XAML?

Thanks in advance for all help!

Answer 1

You can't use the RadMaskedTextBox because it doesn't derive from TextBox. The code inside AutoCompleteBox specifies that this part must at least derive from TextBox.

Answer 2

The first answer is correct. While you can insert a RadMaskedTextBox into an autocomplete template (steps below), internally it wants to see a TextBox class to hook up the text changed event. The Telerik RadMaskedTextBox derives from Control instead, so the event is not hooked up.

• Drag an AutocompleteBox onto your page.
• Drag a Terlerik RadMaskedTextBox onto your page (to add the correct XML namespace for you)
• Edit the AutoComplete template in Blend to generate a local template.
• Manually edit the XAML template to use a RadMaskedTextBox instead of the TextBox.
• Remove the Terlerik RadMaskedTextBox

The solution would be to use another Masked edit box that does derive from TextBox and insert it using the above steps