WPF依賴項屬性錯誤

Question

我試圖定義這樣的依賴項屬性：

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); }
}

而且我收到此錯誤，並且不明白為什么：

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

Answer 1

您的Dependency屬性的默認值類型（ String ）與屬性DepName（ EnumName ）的類型不匹配。

在依賴項屬性中更改默認類型，它應該可以工作。

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