WPF依赖项属性错误

Question

我试图定义这样的依赖项属性：

public static readonly DependencyProperty DependencyPropertyName= DependencyProperty.Register("DepName", typeof(EnumName), typeof(MyWindow1), new FrameworkPropertyMetadata("FrameWorkProperty", FrameworkPropertyMetadataOptions.AffectsRender, Target));

private static void Target(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
{
    //some logic here
}

public EnumName DepName
{
    get { return (EnumName)GetValue(DependencyPropertyName); }
    set { SetValue(DependencyPropertyName, value); }
}

而且我收到此错误，并且不明白为什么：

{"Default value type does not match type of property 'DepName'."}

Answer 1

您的Dependency属性的默认值类型（ String ）与属性DepName（ EnumName ）的类型不匹配。

在依赖项属性中更改默认类型，它应该可以工作。

public static readonly DependencyProperty DependencyPropertyName= DependencyProperty.Register(
    "DepName", 
    typeof(EnumName), 
    typeof(MyWindow1), 
    new FrameworkPropertyMetadata(
        EnumName.SomeValue, // this is the defalt value
        FrameworkPropertyMetadataOptions.AffectsRender, 
        Target));