Wpf 如何制作文本块'；s能见度'；可见'；在文本框中输入文本并按下Enter键时？

当用户在“WhatsYourname文本框”中输入他/她的名字并按Enter键时，我希望隐藏的文本块（“DoyouwanPlayTextBlock”）变得可见。这是我目前在XAML中得到的：

 <TextBox x:Name="playerNameTextbox"                            
             Grid.Column="1" Grid.Row="2"
             VerticalAlignment="Top"
             HorizontalAlignment="Center"
             BorderBrush="Black"
             Height="auto" 
             Width="160"
             HorizontalContentAlignment="Center"
             CaretBrush="red"
             FontFamily="Segoe Print"
             FontSize="30"
             ToolTip="Type your name and then press Enter" 
             KeyUp="playerNameTextbox_KeyUp" />

    <TextBlock Grid.Column="0" Grid.Row="3" Grid.ColumnSpan="2"
        x:Name="doYouWannaPlayTextblock" 
        FontFamily="Segoe Print"
        FontSize="16"
        FontWeight="SemiBold"
        Foreground="Red"
        Padding="20"
        Visibility="Hidden"
        TextAlignment="Center"
        TextWrapping="Wrap" Margin="0,0.4,0.2,-25"> 
        Hi,
        <TextBlock Text="{Binding Path=Text, ElementName=playerNameTextbox}"/>
        - it's good to see you. Would you like to play 'Tables'? If so, just click the 'Choose Game' button.
    </TextBlock> 

但当我试图在WPF中的代码隐藏中使用它时，我无法超越以下内容：

 public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void playerNameTextbox_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter)
        {
            doYouWannaPlayTextblock.Visibility = Visible;
        }
    }
}

}

“可见”和我尝试过的所有东西都会吐出一条红色的曲线

---

任何帮助都将不胜感激。

首先，更改

可见性的正确方法是：

private void playerNameTextbox_KeyUp(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        this.doYouWannaPlayTextblock.Visibility = Visibility.Visible;
    }
}

doYouWannaPlayTextblock.Visibility = Visibility.Visible;

第二，您确定要使用
键控
KeyDown
在这种情况下更有意义，因为它会在您按Enter键时触发，而不是在您松开它时触发

第三，如果您的doYouWannaPlayTextblock在按Enter键之前是不可见的，那么就不需要在XAML中包含文本，因为文本将通过代码进行设置。添加文本的代码为

doYouWannaPlayTextblock.Text = "Hi, " + playerOneNameTextbox.Text + ". " +
        "It's good to see you! " +
        "\r\nWould you like to play with us? " +
        "\r\nIf you would, just click right here in this box.";

非常感谢，马特-这非常有效。我花了很多时间试图解决这个问题，在我读过的所有教程、视频和书籍中，我认为我没有遇到“xxx.Visibility=Visibility.xxx”的构造。我可以问一下，从技术上讲，它到底发生了什么？前一种感觉更适合我，但感谢你的观察。Re是我从某个地方（不确定在哪里或为什么）得到的印象，将这些东西放在XAML中比放在代码中要好。@Mike
Visibility
属性接受一个可见性枚举，因此，您必须首先调用枚举，然后在该枚举中调用所需的值。这就是为什么它看起来像
Visibility.XXXX
doYouWannaPlayTextblock.Text = "Hi, " + playerOneNameTextbox.Text + ". " +
        "It's good to see you! " +
        "\r\nWould you like to play with us? " +
        "\r\nIf you would, just click right here in this box.";