在 WPF TextBox 中忽略并保留换行符

发布于 2025-01-02 01:43:50 字数 717 浏览 1 评论 0原文

我想在文本框中显示一个包含换行符的字符串，但我希望文本框将其显示为单行。删除换行符不是一个选项；编辑文本后也需要保留它们。

在下面的示例中，在第一个 TextBox 中键入内容时，文本必须以单行形式显示在第二个 TextBox 中。编辑第二个文本框中的文本时，必须保留第一个文本框中的换行符。

有谁知道这是否可能？

<Grid Background="AliceBlue">
  <Grid.RowDefinitions>
     <RowDefinition Height="100"/>
     <RowDefinition Height="100"/>
  </Grid.RowDefinitions>

  <TextBox x:Name="FirstTextBox"
     AcceptsReturn="True"
     TextWrapping="Wrap"
     Text="{Binding MyString}" 
     Width="150"/>

  <TextBox x:Name="SecondTextBox"
     Grid.Row="1"
     AcceptsReturn="False"
     TextWrapping="NoWrap"
     Text="{Binding MyString}"
     VerticalAlignment="Top"/>
</Grid>

原文

I want to present a string containing line breaks in a TextBox, but I want the TextBox to show it as a single line. Removing the line breaks is not an option; they need to be preserved, also after editing the text.

In the example below, when typing in the first TextBox, the text must be presented in the second TextBox in a single line. When editing the text in the second TextBox, the line breaks in the first TextBox must be preserved.

Does anyone know if this is possible?

<Grid Background="AliceBlue">
  <Grid.RowDefinitions>
     <RowDefinition Height="100"/>
     <RowDefinition Height="100"/>
  </Grid.RowDefinitions>

  <TextBox x:Name="FirstTextBox"
     AcceptsReturn="True"
     TextWrapping="Wrap"
     Text="{Binding MyString}" 
     Width="150"/>

  <TextBox x:Name="SecondTextBox"
     Grid.Row="1"
     AcceptsReturn="False"
     TextWrapping="NoWrap"
     Text="{Binding MyString}"
     VerticalAlignment="Top"/>
</Grid>

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隱形的亼 2025-01-09 01:43:50

我创建了一个适合我的场景的绑定转换器：换行符被替换为 unicode 零宽度空格字符 (U+200B)：

public class IgnoreLinebreaksConverter : IValueConverter
{
    private const string Sub = " \u200B";
    private const string Lb = "\r\n";

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var s = (string)value;
        return string.IsNullOrEmpty(s) ? s : Regex.Replace(s, Lb, Sub);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var s = (string)value;
        return string.IsNullOrEmpty(s) ? s : Regex.Replace(s, Sub, Lb);
    }
}

I created a binding converter that works for my scenario: Line-breaks are replaced with the unicode zero width space character (U+200B):

public class IgnoreLinebreaksConverter : IValueConverter
{
    private const string Sub = " \u200B";
    private const string Lb = "\r\n";

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var s = (string)value;
        return string.IsNullOrEmpty(s) ? s : Regex.Replace(s, Lb, Sub);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var s = (string)value;
        return string.IsNullOrEmpty(s) ? s : Regex.Replace(s, Sub, Lb);
    }
}

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