Window 已加载事件处理程序："Ensure Event Failed"

Question

我正在尝试执行为 window 加载添加事件处理程序的简单任务。我正在使用 visual studio 2017。当我键入 Loaded="" 并使用 IntelliSense 添加新的事件处理程序时，我收到错误消息 "Ensure Event Failed" 而没有其他信息。怎么了？

XAML:

<Window x:Class="MLD_UI_1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:MLD_UI_1"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" MinHeight="700" Width="525" MinWidth="1050"
    Loaded="">
    <Grid Background="{StaticResource MainBackgroundBrush}">
        <Grid.RowDefinitions>
            <RowDefinition Height="10"/>
            <RowDefinition Height="40"/>
            <RowDefinition Height="*" MinHeight="80"/>
            <RowDefinition Height="200"/>
            <RowDefinition Height="10"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="10"/>
            <ColumnDefinition Width="*" MinWidth="100"/>
            <ColumnDefinition Width="*" MinWidth="100"/>
            <ColumnDefinition Width="10"/>
        </Grid.ColumnDefinitions>
        <Border BorderThickness="2 2 1 2" BorderBrush="Black" Grid.Column="1" Grid.Row="1" Background="{StaticResource UvGradientBrush}" CornerRadius="5 0 0 5"/>
        <Border BorderThickness="1 2 2 2" BorderBrush="Black" Grid.Column="2" Grid.Row="1" Background="{StaticResource IrGradientBrush}" CornerRadius="0 5 5 0"/>
        <Border BorderThickness="2 2 1 2" BorderBrush="Black" Grid.Column="1" Grid.Row="3" Background="{StaticResource GradientBrush}" CornerRadius="5 0 0 5"/>
        <Border BorderThickness="1 2 2 2" BorderBrush="Black" Grid.Column="2" Grid.Row="3" Background="{StaticResource GradientBrush}" CornerRadius="0 5 5 0"/>
        <StackPanel Grid.Column="1" Grid.Row="1" Orientation="Horizontal" Margin="10 0 10 0">
            <TextBlock Text="UV" FontFamily="Tahoma" Foreground="White" VerticalAlignment="Center" FontSize="20"/>
        </StackPanel>
        <StackPanel Grid.Column="2" Grid.Row="1" Orientation="Horizontal" Margin="10 0 10 0">
            <TextBlock Text="IR" FontFamily="Tahoma" Foreground="White" VerticalAlignment="Center" FontSize="20"/>
        </StackPanel>
        <Image x:Name="imagePane1" Grid.Column="1" HorizontalAlignment="Stretch" Grid.Row="2" VerticalAlignment="Stretch" Margin="2 2 2 2"/>
        <Image x:Name="imagePane2" Grid.Column="2" HorizontalAlignment="Stretch" Grid.Row="2" VerticalAlignment="Stretch" Margin="2 2 2 2"/>
    </Grid>
</Window>

Answer 1

x:Class中的命名空间不正确；它与我后面代码中的命名空间不匹配：

将 x:Class="MLD_UI_1.MainWindow" 更改为 x:Class="MLD_UI_2.MainWindow" 修复了所有问题。

Window 已加载事件处理程序："Ensure Event Failed"

Window Loaded event handler: "Ensure Event Failed"

c#

wpf

eventhandler