WPF 为资源字典 添加事件响应的后台类

前言，有许多同学在写WPF程序时在资源字典里加入了其它控件，但又想写事件来控制这个控件，但是资源字典没有CS文件，不像窗体XAML还有一个后台的CS文件，怎么办呢？

在工作时也遇到了这个问题，现在把它分享出来

比如说我们现在要写一个TabControl控件，在TabItem中有一个关闭按钮或其它按钮，这个按钮要能响应某个事件。

现在开始写资源字典里的 TabItem的样式，代码如下

  <Style x:Key="TIStyle" TargetType="{x:Type TabItem}">
        <Setter  Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TabItem}">
                    <Border x:Name="layout" BorderBrush="Gray" BorderThickness="1,1,1,0" Background="{TemplateBinding Background}"
                                CornerRadius="3" Margin="2,0,2,0">
                        <Grid Height="20">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition/>
                                <ColumnDefinition Width="25"/>
                            </Grid.ColumnDefinitions>
                            <TextBlock  TextAlignment="Center" Text="{TemplateBinding Header}" Grid.Column="0" Margin="4,0,3,0"
                            VerticalAlignment="Center"    HorizontalAlignment="Center"/>
                            <Button Content="X" Grid.Column="1"  Height="8" Width="8" Margin="4,1,3,2" 
                            Tag="{TemplateBinding Header}" Click="Button_Click"
                            Background="{x:Null}" BorderBrush="{x:Null}" VerticalAlignment="Center">
                                <Button.Template>
                                    <ControlTemplate >
                                        <Grid>
                                            <Rectangle>
                                                <Rectangle.Fill>
                                                    <VisualBrush>
                                                        <VisualBrush.Visual>
                                                            <Path x:Name="btnPath" 
                                                        Data="M0 0L10 10M0 10L10 0" Stroke="Gray"
                                                        StrokeThickness="1"/>
                                                        </VisualBrush.Visual>
                                                    </VisualBrush>
                                                </Rectangle.Fill>
                                            </Rectangle>
                                        </Grid>
                                        <ControlTemplate.Triggers>
                                            <Trigger Property="IsMouseOver" Value="True">
                                                <Setter TargetName="btnPath" Property="Stroke" Value="Red"/>
                                            </Trigger>
                                        </ControlTemplate.Triggers>
                                    </ControlTemplate>
                                </Button.Template>
                            </Button>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Background" Value="White"/>
                            <Setter TargetName="layout" Property="Margin" Value="2,0,2,-1.5"/>
                        </Trigger>
                        <Trigger Property="IsSelected" Value="false">
                            <Setter Property="Background" Value="LightBlue"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

  public  partial class DicEvent : ResourceDictionary
    {
       public void Button_Click(object sender, RoutedEventArgs e)
       {
           //省去处理，如果显示，表明调用成功。
           MessageBox.Show("你成功了！");
       }
    }

主窗口里调用：

<Window x:Class="WpfDicButton.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <TabControl>
            <TabItem Header="第一" Height=" 30" Style="{DynamicResource ResourceKey=TIStyle}"></TabItem>
            
        </TabControl>
    </Grid>
</Window>

  <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="TabControlDictionary.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>

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