Custom Control Problem

Question

I'm trying to create two controls.  I've modified a RichTextBox to include some extra properties and I want to use that in a user control that I've created.  If I build the richtextbox outside of the project then everything works fine, but if I try to include it in the project things go crazy and it can't load it properly.  The exact error is this:  Type "..." is not defined.  I'm kind of stumped as to why but this is my first time trying this so anyone who could offer an explanation at least would be helping me out.  Thanks

Answer 1

Can you post any code snippets? I don't fully understand what you are asking. Are you including an assembly that has this custom control or are you including the code file and the generic.xaml for your custom control directly in the project with the user control?



If you are including an assembly with the custom control in it have you made sure to include a namespace alias (xmlns) for your assembly so you can reference the control.

Answer 2

I haven't done any retemplating of the richtextbox, I've just got a code behind file that add's two properties, they are as follows...

Public Class iRichTextBox   
Inherits RichTextBox
Public Property SelectionFont as FontFamily
     Get
         Me.Selection.GetPropertyValue(Inline.FontFamily)
     End Get
     Set (ByVal value as FontFamily)
         Me.Selection.ApplyPropertyValue(Inline.FontFamily, value)
     End Set
End Property

Public Property SelectionFontSize as Double
     Get
         Me.Selection.GetPropertyValue(Inline.FontSize)
     End Get
     Set (ByVal value as Double)
         Me.Selection.ApplyPropertyValue(Inline.FontSize, value)
     End Set
End Property
End Class

And I'm trying to create a usercontrol that uses this "custom richtextbox" to create a richtexteditor.  The problem being that it gives me the error from above.

Answer 3

So this class and the UserControl live in the same solution correct? Can you post the XAML snippet that show how you are trying to use the RichTextBox in the UserControl? I am guessing that it might be a namespace alias issue, but I can't tell without seeing the XAML.

--Brad

Answer 4

Hi Prettyman,

The following is a walkthrough to use a derived RichTextBox in a UserControl. It may be different than in your practice, but it may be helpful.

1. Create a WPF application project, named WpfApplication1.
2. Add a class into the project, which derives from the RichTextBox class.
3. Add a UserControl into the project. The XAML of the UserControl is as follows:

<UserControl x:Class="WpfApplication1.UserControl1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication1"
    Height="300" Width="300">
  <local:iRichTextBox/>
</UserControl>

Sincerely,
Linda Liu

---

Please remember to mark the replies as answers if they help and unmark them if they provide no help.
Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.