通过x:Class给ResourceDictionary内添加事件处理

windxx 2012-08-17 11:14:09

我想给存在于CustomControl的Template里的事件添加处理程序(Storyboard.Completed发生的时候我想弹出一个对话框)，但却发生了异常，请大家帮忙看下哪里错了，我的代码如下：
xaml代码：



<ResourceDictionary

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="clr-namespace:xClassTest"

    x:Class="xClassTest.Class1"

>





    <Style TargetType="{x:Type local:CustomControl1}">

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="{x:Type local:CustomControl1}">

                    <Viewbox>

                        <Grid x:Name="TheGrid" Width="50" Height="50">

                            <Rectangle x:Name="TheRect" Fill="LightBlue"/>

                        </Grid>

                    </Viewbox>

                    <ControlTemplate.Triggers>

                        <EventTrigger RoutedEvent="Grid.MouseEnter" SourceName="TheGrid">

                            <BeginStoryboard>

                                <Storyboard Completed="Storyboard_Completed">

                                    <DoubleAnimation To="100" Storyboard.TargetName="TheGrid"

                                                     Storyboard.TargetProperty="Width"/>

                                </Storyboard>

                            </BeginStoryboard>

                        </EventTrigger>

                        <EventTrigger RoutedEvent="Grid.MouseLeave" SourceName="TheGrid">

                            <BeginStoryboard>

                                <Storyboard Completed="Storyboard_Completed">

                                    <DoubleAnimation To="50" Storyboard.TargetName="TheGrid"

                                                     Storyboard.TargetProperty="Width"/>

                                </Storyboard>

                            </BeginStoryboard>

                        </EventTrigger>

                    </ControlTemplate.Triggers>

                </ControlTemplate>

            </Setter.Value>

        </Setter>

    </Style>

</ResourceDictionary>

.cs codes:



using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;



namespace xClassTest

{

    public class CustomControl1 : Control

    {

        static CustomControl1()

        {

            DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl1), new FrameworkPropertyMetadata(typeof(CustomControl1)));

        }

    }



    public partial class Class1 : ResourceDictionary

    {

        public Class1()

        {

            InitializeComponent();

        }

        void Storyboard_Completed(object sender, EventArgs e)

        {

            MessageBox.Show("Completed!");

        }

    }

}

调用CustomControl1的代码:



<Window x:Class="xClassTest.Window1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="clr-namespace:xClassTest"

    Title="Window1" Height="300" Width="300">

    <Canvas>

        <local:CustomControl1/>

    </Canvas>

</Window>

以上代码Build没提示错误，但是Run的时候在Window1构造函数的InitializeComponent()方法处提示："无法重新初始化 ResourceDictionary 实例。对象“xClassTest.Class1”行 4 位置 5 处的错误。"

后来我发现，只要在CustomControl1的模板xaml文件那里的根元素添加： x:Class="xClassTest.Class1"
这一行就有这个错误提示，请问是什么问题呢？如果要实现我开始描述的要求（Storyboard Completed事件发生的时候在C#代码部分做处理）应该怎么做呢？

非常感谢您的帮助。

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