引用命名空间
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
修改TextBox
<TextBox >
<i:Interaction.Triggers>
<ei:KeyTrigger FiredOn="KeyUp" Key="Return">
<i:InvokeCommandAction Command="{Binding FuzzyQueryCommand}"></i:InvokeCommandAction>
</ei:KeyTrigger>
</i:Interaction.Triggers>
</TextBox>
