c# - 为什么我的 XAML 代码没有运行？

Question

我的 C# 代码有效，但 XAML 代码无效...我不知道我犯了什么错误。我是 XAML 的新手，我尝试学习它。当我删除这段代码时:

KeyDown = "HandleKeyDown"

Initialized = "MainWindow_Initilized" Background ="DimGray">

那么就没有错误了。

<Window x:Class="Tetris.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="570" Width="525">
    KeyDown = "HandleKeyDown" 
    Initialized = "MainWindow_Initilized" Background ="DimGray">

  <DockPanel LastChildFill="False">
    <StackPanel DockPanel.Dock="Right" Width="127">
      <Label Content="Label" Height="56" Name="Scores" FontSize="28" FontWeight="Bold" />
      <Label Content="Label" Height="56" Name="Lines" FontSize="28" FontWeight="Bold"/>
    </StackPanel>
    <Grid Name="MainGrid" Height="500" Width="250">
      <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
      </Grid.RowDefinitions>
      <Grid.ColumnDefinitions>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
      </Grid.ColumnDefinitions>
    </Grid>
  </DockPanel>
 </Window>

Answer 1

在声明 KeyDown 属性之前，您有一个额外的 >。

注意颜色突出显示停止

<Window x:Class="Tetris.MainWindow"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
    Title="MainWindow" Height="570" Width="525">  
    KeyDown = "HandleKeyDown"   
    Initialized = "MainWindow_Initilized" Background ="DimGray"> 

我不认为你打算在那里。