DefaultStyleKeyProperty第二次 [英] DefaultStyleKeyProperty second time

问题描述

我用Kenneth Haugland推荐我这个工具：



WPF-Drawing-Canvas-Control



和我有一个问题，我想这很简单..



在类DrawingCanvas上有一个自定义控件

Hi,

I used this tool as Kenneth Haugland recommended me:

WPF-Drawing-Canvas-Control

and I have a problem that I guess is pretty simple..

On the class DrawingCanvas there''s a custom control

#Region "Constructor"
    Sub New()
        DefaultStyleKeyProperty.OverrideMetadata(GetType(DrawingCanvas), _
               New FrameworkPropertyMetadata(GetType(DrawingCanvas)))

.... 。

.....

Public Shared canvaseventproperty As DependencyProperty =   
  DependencyProperty.Register("canvasevent", GetType(selecteddrawingevent), GetType(DrawingCanvas), new propertymatadata()) ....

在我的项目中，除了这一个窗口并且根据窗口中的一个选择的参数x，窗口drawingcanvascontrol打开，带有一张图片。

第一次没有问题，但是当我回到上一个窗口（x）并导航时到drawingcanvascontrol我收到此错误：



PropertyMetadata属性已经注册了类型''DrawingCanvas''



可能是什么问题？



谢谢！

In my project there''s more than this one window and according to a chosed param in window "x", the window "drawingcanvascontrol" opens with a certain picture.
On the first time there''s no problem but when I go back to the previous window ("x") and it navigates to "drawingcanvascontrol" I get this error:

"PropertyMetadata property is already registered for the type ''DrawingCanvas'' "

what may be the problem?

thanks!

推荐答案

删除了那部分从我的构造函数，它工作得很好 -

deleted that part from my constructor and it worked fine-

'defaultStyleKeyProperty.OverrideMetadata(GetType(DrawingCanvas), _
              'New FrameworkPropertyMetadata(GetType(DrawingCanvas)))

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