为什么我看不到我创建的菜单

本文关键字：菜单 创建 我看 看不到 为什么 | 更新日期: 2023-09-27 18:33:17

所以我正在创建一个小型的wpf应用程序，我希望它有一个菜单。我创建了菜单，但没有，但是当我运行程序时，菜单根本不显示。菜单的代码当前为：

<Window x:Class="TBA_Alpha.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TBA LogIn" Height="350" Width="525">
<Grid>
    <PasswordBox x:Name="tbPsw" HorizontalAlignment="Left" Margin="214,143,0,0" VerticalAlignment="Top" Width="133" SelectionBrush="Black" Background="White">
        <PasswordBox.BorderBrush>
            <LinearGradientBrush EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0">
                <GradientStop Color="#FFABADB3" Offset="0.05"/>
                <GradientStop Color="#FFE2E3EA" Offset="0.07"/>
                <GradientStop Color="Black" Offset="1"/>
            </LinearGradientBrush>
        </PasswordBox.BorderBrush>
    </PasswordBox>
    <TextBox x:Name="tbUId" HorizontalAlignment="Left" Height="23" Margin="214,94,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="133" SelectionBrush="Black">
        <TextBox.Background>
            <SolidColorBrush Color="White"/>
        </TextBox.Background>
        <TextBox.BorderBrush>
            <LinearGradientBrush EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0">
                <GradientStop Color="#FFABADB3" Offset="0.05"/>
                <GradientStop Color="#FFE2E3EA" Offset="0.07"/>
                <GradientStop Color="Black" Offset="1"/>
            </LinearGradientBrush>
        </TextBox.BorderBrush>
    </TextBox>
    <Button Content="LogIn" HorizontalAlignment="Left" Margin="239,200,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
    <TextBlock HorizontalAlignment="Left" Margin="214,73,0,0" TextWrapping="Wrap" Text="Your UserID:" VerticalAlignment="Top"/>
    <TextBlock HorizontalAlignment="Left" Margin="214,122,0,0" TextWrapping="Wrap" Text="Your Password:" VerticalAlignment="Top"/>
    <Menu HorizontalAlignment="Left" Height="25" VerticalAlignment="Top" Width="43" BorderThickness="1">
        <MenuItem Header=" New " RenderTransformOrigin="0.5,0.5" Width="63" Height="36" Background="White" Visibility="Visible" AllowDrop="True" IsHitTestVisible="True">
            <MenuItem Header=" User " Click="newUser"/>
        </MenuItem>
    </Menu>
</Grid>

任何帮助都将不胜感激，谢谢。

编辑：为 wpf 添加了整个 XAML 代码，其中菜单接近代码末尾

编辑：删除所有附加内容并仅保留标题后，仍然遇到相同的问题

编辑：在不同的干净项目中尝试了代码，它起作用了，谢谢

为什么我看不到我创建的菜单

问题是大多数控件使用 Magrin 属性来分隔自身，而不是Grid的功能。由于它们都没有指定附加的属性Grid.Row，因此它们都在同一行中。由于Menu没有指定Margin，因此它位于Grid的顶部，因此与其他控件重叠。

尝试使用实际网格行

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <PasswordBox x:Name="tbPsw" HorizontalAlignment="Left" Grid.Row="0" VerticalAlignment="Top" Width="133" SelectionBrush="Black" Background="White">
        <PasswordBox.BorderBrush>
            <LinearGradientBrush EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0">
                <GradientStop Color="#FFABADB3" Offset="0.05"/>
                <GradientStop Color="#FFE2E3EA" Offset="0.07"/>
                <GradientStop Color="Black" Offset="1"/>
            </LinearGradientBrush>
        </PasswordBox.BorderBrush>
    </PasswordBox>
    <TextBox x:Name="tbUId" HorizontalAlignment="Left" Height="23" Grid.Row="1" TextWrapping="Wrap" VerticalAlignment="Top" Width="133" SelectionBrush="Black">
        <TextBox.Background>
            <SolidColorBrush Color="White"/>
        </TextBox.Background>
        <TextBox.BorderBrush>
            <LinearGradientBrush EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0">
                <GradientStop Color="#FFABADB3" Offset="0.05"/>
                <GradientStop Color="#FFE2E3EA" Offset="0.07"/>
                <GradientStop Color="Black" Offset="1"/>
            </LinearGradientBrush>
        </TextBox.BorderBrush>
    </TextBox>
    <Button Content="LogIn" HorizontalAlignment="Left" Grid.Row="2" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
    <TextBlock HorizontalAlignment="Left" Grid.Row="3" TextWrapping="Wrap" Text="Your UserID:" VerticalAlignment="Top"/>
    <TextBlock HorizontalAlignment="Left" Grid.Row="4" TextWrapping="Wrap" Text="Your Password:" VerticalAlignment="Top"/>
    <Menu Grid.Row="5" HorizontalAlignment="Left" Height="25" VerticalAlignment="Top" Width="43" BorderThickness="1">
        <MenuItem Header=" New " RenderTransformOrigin="0.5,0.5" Width="63" Height="36" Background="White" Visibility="Visible" AllowDrop="True" IsHitTestVisible="True">
            <MenuItem Header=" User " Click="newUser"/>
        </MenuItem>
    </Menu>
</Grid>
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