[Silverlight入门系列]使用MVVM模式(6)：使用Behavior
Behavior把一些常用的行为封装成可重复使用的组件(Component)，在理想状况下，Designer(设计师)或domain expert(特定领域的专家，例如财会人员、HR人员、或MIS)甚至可以完全不需要具备程序设计的观念，只需要了解基础的事件(Event)观念，就可以顺利的开发出一套系统，若需要实现特定的功能时，可商请developere为他们开发所需要的Behavior，designer只需要取得这些Behavior并使用即可。例如，界面设计人员可以使用Expression Blend把一个Behavior拖到一个界面元素上，比如右键点击以后启动一段动画这个行为，这个界面元素就会自动执行，岂不是很清爽！（当然，执行函数还是要编程人员编写），来个例子：界面xaml:
<div class="cnblogs_code">http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gifhttp://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gifView Code <div class="cnblogs_code_hide"> 1 <UserControl 2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 4 xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 5 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 6 xmlns:wm="clr-namespace:AsycValidation" 7 xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" x:Class="AsycValidation.MainPage" 8 mc:Ignorable="d" 9 x:Name="MyUserControl"10 d:DesignHeight="300" d:DesignWidth="400">11 12 <Grid x:Name="Layout" >13 <TextBlock Height="32" HorizontalAlignment="Left" Margin="41,53,0,0" x:Name="textBlock1" Text="Company:" VerticalAlignment="Top" Width="66" />14 <TextBox Height="31" HorizontalAlignment="Left" Margin="120,45,0,0" x:Name="textBox1" Text="{Binding CompanyName, Mode=TwoWay, NotifyOnValidationError=True}" VerticalAlignment="Top" Width="119" />15 <TextBox Height="30" HorizontalAlignment="Left" Margin="120,104,0,0" x:Name="textBox2" Text="{Binding CompanyID, Mode=TwoWay, NotifyOnValidationError=True}" VerticalAlignment="Top" Width="119" />16 <Button Content="Button" Height="36" HorizontalAlignment="Left" Margin="120,156,0,0" x:Name="button1" VerticalAlignment="Top" Width="81" >17 <i:Interaction.Triggers>18 <i:EventTrigger EventName="Click">19 <ei:CallMethodAction MethodName="button1_Click" TargetObject="{Binding ElementName=MyUserControl}"/>20 </i:EventTrigger>21 <i:EventTrigger>22 <ei:CallMethodAction MethodName="button1_loaded" TargetObject="{Binding ElementName=MyUserControl}"/>23 </i:EventTrigger>24 </i:Interaction.Triggers>25 </Button>26 </Grid>27 </UserControl>
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