StackOverflowException上的InitializeComponent [英] StackOverflowException on InitializeComponent

问题描述

我想跟随的这个小教程，但我不断收到此异常

I'm trying to follow this little tutorial, but I keep getting this exception.

有关XAML看起来像这样：

The relevant XAML looks like this:

    <StatusBar Margin="0,288,0,0" Name="statusBar" Height="23" VerticalAlignment="Bottom">
        <StatusBar.DataContext>
            <m:MainWindow />
        </StatusBar.DataContext>
        <TextBlock Name="statusText" Text="{Binding Path=StatusBarText, NotifyOnTargetUpdated=True}" DataContext="{Binding}">
            <TextBlock.Triggers>
                <EventTrigger RoutedEvent="Binding.TargetUpdated">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity">
                                <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                                <EasingDoubleKeyFrame KeyTime="0:0:0.25" Value="1"/>
                                <EasingDoubleKeyFrame KeyTime="0:0:4" Value="1"/>
                                <EasingDoubleKeyFrame KeyTime="0:0:5" Value="0"/>
                            </DoubleAnimationUsingKeyFrames>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </TextBlock.Triggers>
        </TextBlock>
    </StatusBar>

我猜我发现了 StackOverflowException 因为我尝试使用主窗口为的DataContext 。我想使用主窗口，因为它好像把我的 StatusBarText 属性合乎逻辑的地方，

I'm guessing I'm getting the StackOverflowException because I'm trying to use MainWindow as the DataContext. I want to use the MainWindow because it seems like a logical place to put my StatusBarText property,

public partial class MainWindow : Window
{
    public string StatusBarText { get; set; }

这使得它更容易访问我的代码隐藏事件处理程序。

It makes it easier to access in my code-behind event handlers.

那我该怎么办呢？我应该在哪里把这个属性？还是有方法来设置的DataContext为本，这样它不创建主窗口的新实例，只是提到自己？

What am I supposed to do then? Where am I supposed to put this property? Or is there a way to set the DataContext to "this" so that it doesn't create a new instance of MainWindow and just refers to itself?

推荐答案

我一般设置我的代码隐藏的DataContext，在构造函数（我通常使用MVVM，但应用于小型临时项目窗口）：

I generally set my DataContext in code-behind, in the constructor (I usually use MVVM, but have used a window in small temp projects):

public MainWindow()
{
    statusBar.DataContext = this;
}

请注意，在你所示的代码示例，你只会得到您的初始StatusBarText值因为你没有实现INotifyPropertyChanged的。

Note that in your shown code example, you will only get your initial StatusBarText value, because you are not implementing INotifyPropertyChanged.

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