(WPF) Textbox 每次输入触发事件处理

1.  Code behind. 

复制代码protected void TextBox1_TextChanged(object sender, EventArgs e) { Label1.Text = Server.HtmlEncode(TextBox1.Text); }

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protected void TextBox1_TextChanged(object sender, EventArgs e)  
{  
   Label1.Text = Server.HtmlEncode(TextBox1.Text);  
}  

2.  Event trigger

复制代码 xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

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xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

 

复制代码 <i:Interaction.Triggers> <i:EventTrigger EventName="TextChanged"> <i:InvokeCommandAction Command="{Binding StartTextChanged}" ></i:InvokeCommandAction> </i:EventTrigger> </i:Interaction.Triggers>

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<i:Interaction.Triggers>
                <i:EventTrigger EventName="TextChanged">
                    <i:InvokeCommandAction Command="{Binding StartTextChanged}" />
                </i:EventTrigger>
            </i:Interaction.Triggers>

3.  MVVM ( Prefered)

复制代码<TextBox Text="{Binding MyText,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>

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<TextBox Text="{Binding MyText,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>