Question

在WPF中使用TextBox我遇到的问题是，如果我使用'，'而不是'。'每次我尝试获取值时，TextBox内的文本都使用相同的数字进行转换而不使用逗号..

如何禁用此自动转换？

<TextBox 
    x:Name="XValue" 
    Text="{Binding XInitValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
    Width="80" VerticalAlignment="Center" 
    TextChanged="XValue_TextChanged" 
</TextBox>

private void XValue_TextChanged(object sender, TextChangedEventArgs e)
{
    double a = XInitValue;
}

Answer 1

我使用转换器解决了它

public class DecimalConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if(CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator == ".")
                return value.ToString().Replace(",", ".");
            else
                return value.ToString().Replace(".", ",");
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator == ".")
                return value.ToString().Replace(".", ",");
            else
                return value.ToString().Replace(",", ".");
        }

    }

Answer 2

它确实有效！谢谢！

我将其更改为更通用一些，不要在转换器本身中使用CurrentCulture，如果输入的值以小数点分隔符结尾，则会返回错误。没有最后一部分，如果UpdateSourceTrigger = PropertyChanged，我根本无法输入小数点分隔符。

public class DecimalConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value == null)
        {
            return null;
        }
        if (value is string stringValue && targetType == typeof(decimal))
        {
            var decSeparator = culture.NumberFormat.NumberDecimalSeparator;
            var normString = decSeparator == "."
                ? stringValue.Replace(",", ".")
                : stringValue.Replace(".", ",");
            if (!normString.EndsWith(decSeparator) && decimal.TryParse(normString, out var decResult))
            {
                return decResult;
            }
        }
        return DependencyProperty.UnsetValue;
    }
}

当然应该在App.xml.cs或启动应用程序的其他地方设置CurrentCulture：

    var culture = CultureInfo.GetCultureInfo("de-DE");
    Thread.CurrentThread.CurrentCulture = culture;
    Thread.CurrentThread.CurrentUICulture = culture;
    FrameworkElement.LanguageProperty.OverrideMetadata(
        typeof(FrameworkElement),
        new FrameworkPropertyMetadata(
            XmlLanguage.GetLanguage(culture.IetfLanguageTag)));

小数分隔符翻倍WPF

2 个答案: