WPF委托命令DelegateCommand的传参方式

首先引用  Microsoft.Practices.Prism

MVVM模式代码如下：

XAML代码：

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<!-- 无参方式 -->

<Button Content="Test Command" Command="{Binding TestCommand}" />

 

<!-- 将自己作为参数 -->

<Button Content="Test Command2" Command="{Binding TestCommand2}" CommandParameter="{Binding RelativeSource={x:Static RelativeSource.Self}}" >

 

<!-- 将父元素作为参数 -->

<Button Content="Test Command3" Command="{Binding TestCommand3}" CommandParameter="{Binding RelativeSource={x:Static RelativeSource.TemplatedParent}}" >

后台代码：

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this.DataContext = new ViewModel();

ViewModel代码：

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// ViewModel 构造函数

public ViewModel()

{   

    CallCOmmand1 = new DelegateCOmmmand(Call1);

    CallCOmmand2 = new DelegateCOmmmand<Object>(Call2);

    CallCOmmand3 = new DelegateCOmmmand<Object>(Call3);

}

 

// 命令声明

public DelegateCommand CallCommand { get; private set; }

public DelegateCommand<Object> CallCommand2 { get; private set; }

public DelegateCommand<Object> CallCommand3 { get; private set; }

 

// 命令实现

public void Call1()

{

}

 

public void Call2( Object obj )

{

    Button button = obj as Button;

}

 

public void Call3( Object obj )

{

    ParentType parent = obj as ParentType;

}