WPF TextBox内容修改命令

<TextBox

Background="{x:Null}"

Text="{Binding SearchForContent, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">

<i:Interaction.Triggers>

<i:EventTrigger EventName="TextChanged">
<i:InvokeCommandAction Command="{Binding TextChangedCommand}" />
</i:EventTrigger>
<i:EventTrigger EventName="LostFocus">
<i:InvokeCommandAction Command="{Binding LostFocusAndGotFocusCommand}" CommandParameter="LostFocus" />
</i:EventTrigger>
<i:EventTrigger EventName="GotFocus">
<i:InvokeCommandAction Command="{Binding LostFocusAndGotFocusCommand}" CommandParameter="GotFocus" />
</i:EventTrigger>

</i:Interaction.Triggers>

</TextBox>

xmlns:i="http://schemas.microsoft.com/xaml/behaviors"

后台的话根据需要，自己声明命令，命令事件即可

这玩意儿是开源的，需要下载ViewModelBase包