35 lines
1.1 KiB
Markdown
35 lines
1.1 KiB
Markdown
# 释义
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本不属于某个对象的属性，在被需要的时候后来附加;在特定环境下，对象才具有的属性，如当一个控件在Grid中时，会附加Grid.Column属性等
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本质上是依赖属性
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用clr属性包装时不同，是采用两个方法
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```csharp
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public static int GetMyProperty(DependencyObject obj)
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{
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return (int)obj.GetValue(MyPropertyProperty);
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}
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public static void SetMyProperty(DependencyObject obj, int value)
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{
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obj.SetValue(MyPropertyProperty, value);
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}
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// Using a DependencyProperty as the backing store for MyProperty. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty MyPropertyProperty =
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DependencyProperty.RegisterAttached("MyProperty", typeof(int), typeof(ownerclass), new PropertyMetadata(0));
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```
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把年级附加属性附加给人
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```csharp
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class Human:DependencyObject
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{
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}
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Human human=new Human()
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School.SetMyProperty(human,6)//设置属性
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int grade=School.GetMyProperty(human)//得到属性值
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```
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