使用“真实” WPF 绑定中的 CultureInfo.CurrentCulture,而不是 IetfLanguageTag 中的 CultureInfo

发布于 2024-11-03 18:16:09 字数 1236 浏览 6 评论 0原文

就我而言:

我有一个 TextBlock 绑定到 DateTime 类型的属性。 我希望它按照用户的区域设置显示。

<TextBlock Text="{Binding Date, StringFormat={}{0:d}}" />

我将 Language 属性设置为 WPF XAML 绑定和 CurrentCulture 显示 说:

this.Language = XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag);

但是使用这行代码,它只是将文本显示为 CultureInfo 的默认格式 使用 CurrentCulture 的 IetfLanguageTag 表示,而不是像系统区域设置中选择的有效值所示:(

例如,对于“de-DE”,使用 dd.MM.yyyy 代替选定的 yyyy-MM- dd)

区域设置:不是默认值,但使用 yyy-MM-dd

是有没有办法让 Binding 使用正确的格式,而无需在每个 Binding 上定义 ConverterCulture?

在代码中

string.Format("{0:d}",Date);

使用正确的文化设置。

编辑:

另一种无法按预期工作的方式(例如 this.Language = ... ):

xmlns:glob="clr-namespace:System.Globalization;assembly=mscorlib"

<Binding Source="{x:Static glob:CultureInfo.CurrentCulture}" 
 Path="IetfLanguageTag" 
 ConverterCulture="{x:Static glob:CultureInfo.InvariantCulture}" />

In my case:

I have a TextBlock Binding to a property of type DateTime.
I want it to be displayed as the Regional settings of the User says.

<TextBlock Text="{Binding Date, StringFormat={}{0:d}}" />

I am setting Language property as WPF XAML Bindings and CurrentCulture Display
says:

this.Language = XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag);

But with this line of code it just displays the text as the default format of CultureInfo
with IetfLanguageTag of CurrentCulture says, not as the effective value selected in systems region settings says:

(e.g. for "de-DE" dd.MM.yyyy is used instead of selected yyyy-MM-dd)

Region settings: not the default but yyy-MM-dd is used

Is there a way Binding uses the correct format without defining ConverterCulture on every single Binding?

In code

string.Format("{0:d}",Date);

uses the right Culture settings.

edit:

another way which doesn't work as desired (like this.Language = ... does):

xmlns:glob="clr-namespace:System.Globalization;assembly=mscorlib"

and

<Binding Source="{x:Static glob:CultureInfo.CurrentCulture}" 
 Path="IetfLanguageTag" 
 ConverterCulture="{x:Static glob:CultureInfo.InvariantCulture}" />

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评论(8

臻嫒无言 2024-11-10 18:16:09

您可以创建绑定的子类(例如 CultureAwareBinding),它在创建时自动将 ConverterCulture 设置为当前区域性。

这不是一个完美的解决方案,但它可能是唯一的解决方案,因为追溯强制 Binding 尊重文化可能会破坏 WPF 中依赖于此行为的其他代码。

如果您需要更多帮助,请告诉我!

You can create a subclass of binding (e.g. CultureAwareBinding) which sets the ConverterCulture automatically to the current culture when created.

It's not a perfect solution, but it's probably the only one, since retroactively forcing Binding to respect the culture could break other code in WPF which depends on this behavior.

Let me know if you need more help!

夜访吸血鬼 2024-11-10 18:16:09

这是 aKzenT 答案的延伸。他们建议我们应该创建Binding类的子类并将ConverterCulture设置为CurrentCulture。尽管答案非常简单,但我觉得有些人可能不太愿意实现它,因此我分享 aKzenT 答案的代码版本以及如何在 XAML 中使用它的示例。

using System;
using System.Globalization;
using System.Windows.Data;

namespace MyWpfLibrary
{
    public class CultureAwareBinding : Binding
    {
        public CultureAwareBinding()
        {
            ConverterCulture = CultureInfo.CurrentCulture;
        }
    }
}

如何在 XAML 中使用此示例

1) 您需要将命名空间导入到 XAML 文件中:

<Page
    ...
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:myWpfLib="clr-namespace:MyWpfLibrary;assembly=<assembly_name>"
    ...
>

2) CultureAwareBinding 的实际用法

<Textblock Text="{myWpfLib:CultureAwareBinding Path=Salary, Source=Contact, StringFormat={}{0:C}}" />

This is an extension of answer from aKzenT. They proposed that we should create a subclass of Binding class and set the ConverterCulture to CurrentCulture. Even though the answer is very straight forward, I feel some people may not be very comfortable implementing it, so I am sharing the code version of aKzenT's answer with an example of how to use it in XAML.

using System;
using System.Globalization;
using System.Windows.Data;

namespace MyWpfLibrary
{
    public class CultureAwareBinding : Binding
    {
        public CultureAwareBinding()
        {
            ConverterCulture = CultureInfo.CurrentCulture;
        }
    }
}

Example of how to use this in XAML

1) You need to import your namespace into your XAML file:

<Page
    ...
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:myWpfLib="clr-namespace:MyWpfLibrary;assembly=<assembly_name>"
    ...
>

2) Real world usage of the CultureAwareBinding

<Textblock Text="{myWpfLib:CultureAwareBinding Path=Salary, Source=Contact, StringFormat={}{0:C}}" />
阿楠 2024-11-10 18:16:09

在初始化任何 UI 之前放置以下代码行。这对我有用。

FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement),
    new FrameworkPropertyMetadata(XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

(并删除所有显式文化参数)

Put the following line of code, before any UI is initialized. This worked for me.

FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement),
    new FrameworkPropertyMetadata(XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

(And remove all explicit culture parameters)

往昔成烟 2024-11-10 18:16:09

你的第二次尝试很接近,并引导我找到了一个对我有用的解决方案。

设置 ConverterCulture 的问题在于它仅在您拥有转换器时才使用。因此,只需创建一个简单的 StringFormatConverter ,将格式作为其参数:

public sealed class StringFormatConverter : IValueConverter
{
    private static readonly StringFormatConverter instance = new StringFormatConverter();
    public static StringFormatConverter Instance
    {
        get
        {
            return instance;
        }
    }

    private StringFormatConverter()
    {
    }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return string.Format(culture, (string)parameter, value);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}

然后您可以调整绑定(假设您已将转换器的命名空间导入为“my”)

<TextBlock Text="{Binding Date, Converter={x:Static my:StringFormatConverter.Instance}, ConverterCulture={x:Static glob:CultureInfo.CurrentCulture}, ConverterParameter={}{0:d}}" />

Your second attempt was close, and led me to a solution that does work for me.

The problem with setting the ConverterCulture is that it is only used when you have a Converter. So simply create a simple StringFormatConverter that takes the format as its parameter:

public sealed class StringFormatConverter : IValueConverter
{
    private static readonly StringFormatConverter instance = new StringFormatConverter();
    public static StringFormatConverter Instance
    {
        get
        {
            return instance;
        }
    }

    private StringFormatConverter()
    {
    }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return string.Format(culture, (string)parameter, value);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}

Then you can adjust your binding (assuming you've imported the converter's namespace as "my")

<TextBlock Text="{Binding Date, Converter={x:Static my:StringFormatConverter.Instance}, ConverterCulture={x:Static glob:CultureInfo.CurrentCulture}, ConverterParameter={}{0:d}}" />
你爱我像她 2024-11-10 18:16:09

我使用该代码可以得到满足我需要的正确结果。希望它能满足您的需求:-)!
如果不能“TryParse”,也许你最好抛出异常。由你决定。

public sealed class CurrentCultureDoubleConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((double)value).ToString((string)parameter ?? "0.######", CultureInfo.CurrentCulture);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        double result;
        if (Double.TryParse(value as string, NumberStyles.Number, CultureInfo.CurrentCulture, out result))
        {
            return result;
        }

        throw new FormatException("Unable to convert value:" + value);
        // return value;
    }
}

用法:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:simulatorUi="clr-namespace:SimulatorUi"
        xmlns:Converter="clr-namespace:HQ.Wpf.Util.Converter;assembly=WpfUtil" x:Class="SimulatorUi.DlgTest"
        Title="DlgTest" Height="300" Width="300">
    <Window.DataContext>
        <simulatorUi:DlgTestModel/>
    </Window.DataContext>

    <Window.Resources>
        <Converter:CurrentCultureDoubleConverter x:Key="CurrentCultureDoubleConverter"/>
    </Window.Resources>

    <Grid>
        <TextBox Text="{Binding DoubleVal, Converter={StaticResource CurrentCultureDoubleConverter}}"/>
    </Grid>
</Window>

I use that code with proper results to my needs. Hope it could fills your :-) !
Perhaps you are better throwing an exception if cannot "TryParse". Up to you.

public sealed class CurrentCultureDoubleConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((double)value).ToString((string)parameter ?? "0.######", CultureInfo.CurrentCulture);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        double result;
        if (Double.TryParse(value as string, NumberStyles.Number, CultureInfo.CurrentCulture, out result))
        {
            return result;
        }

        throw new FormatException("Unable to convert value:" + value);
        // return value;
    }
}

Usage:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:simulatorUi="clr-namespace:SimulatorUi"
        xmlns:Converter="clr-namespace:HQ.Wpf.Util.Converter;assembly=WpfUtil" x:Class="SimulatorUi.DlgTest"
        Title="DlgTest" Height="300" Width="300">
    <Window.DataContext>
        <simulatorUi:DlgTestModel/>
    </Window.DataContext>

    <Window.Resources>
        <Converter:CurrentCultureDoubleConverter x:Key="CurrentCultureDoubleConverter"/>
    </Window.Resources>

    <Grid>
        <TextBox Text="{Binding DoubleVal, Converter={StaticResource CurrentCultureDoubleConverter}}"/>
    </Grid>
</Window>
不美如何 2024-11-10 18:16:09

我想出了一个避免更新所有绑定的黑客/解决方法。将此代码添加到主窗口的构造函数中。

XmlLanguage language = XmlLanguage.GetLanguage("My-Language");
typeof(XmlLanguage).GetField("_compatibleCulture", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(language, CultureInfo.CurrentCulture);
this.Language = language;

由于它使用反射,因此不能保证它将来会起作用,但目前它可以(.NET 4.6)。

I came up with a hack/workaround that avoids updating all your bindings. Add this code to the constructor of your main window.

XmlLanguage language = XmlLanguage.GetLanguage("My-Language");
typeof(XmlLanguage).GetField("_compatibleCulture", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(language, CultureInfo.CurrentCulture);
this.Language = language;

Since it's using reflection there is no guarantee that it will work in the future, but for now it does (.NET 4.6).

千纸鹤 2024-11-10 18:16:09

我们可以使用 IValueConverter 创建一个 DateTime 转换器

[ValueConversion(typeof(DateTime), typeof(String))]
    class DateTimeToLocalConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is DateTime)) return "Invalid DateTime";
            DateTime DateTime = (DateTime)value;
            return DateTime.ToLocalTime().ToShortDateString();

        }


        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }


    }

在 XAML 中应用它,如下所示

Binding="{Binding Path=createdDateTime,Converter={StaticResource DateTimeConverter}}"

还要更改当前区域性以获得所需的格式,并且需要在应用程序启动时应用相同的格式

/// <summary>
        /// Set Culture
        /// </summary>
        private void SetCulture() {
            var newCulture = new CultureInfo("en-IN");
            newCulture.DateTimeFormat.ShortDatePattern = "dd-MMM-yyyy";
            newCulture.DateTimeFormat.LongDatePattern = "dd-MMM-yyyy";
            newCulture.DateTimeFormat.FullDateTimePattern = "dd-MMM-yyyy";
            CultureInfo.DefaultThreadCurrentCulture = newCulture;
            CultureInfo.DefaultThreadCurrentUICulture = newCulture;
            Thread.CurrentThread.CurrentCulture = newCulture;
            Thread.CurrentThread.CurrentUICulture = newCulture;
            FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(
                System.Windows.Markup.XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));
        }

We can create a DateTime Converter using the IValueConverter

[ValueConversion(typeof(DateTime), typeof(String))]
    class DateTimeToLocalConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is DateTime)) return "Invalid DateTime";
            DateTime DateTime = (DateTime)value;
            return DateTime.ToLocalTime().ToShortDateString();

        }


        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }


    }

Apply this in the XAML as shown below

Binding="{Binding Path=createdDateTime,Converter={StaticResource DateTimeConverter}}"

Also change the current culture to get the desired format and the same needs to be applied on the application startup

/// <summary>
        /// Set Culture
        /// </summary>
        private void SetCulture() {
            var newCulture = new CultureInfo("en-IN");
            newCulture.DateTimeFormat.ShortDatePattern = "dd-MMM-yyyy";
            newCulture.DateTimeFormat.LongDatePattern = "dd-MMM-yyyy";
            newCulture.DateTimeFormat.FullDateTimePattern = "dd-MMM-yyyy";
            CultureInfo.DefaultThreadCurrentCulture = newCulture;
            CultureInfo.DefaultThreadCurrentUICulture = newCulture;
            Thread.CurrentThread.CurrentCulture = newCulture;
            Thread.CurrentThread.CurrentUICulture = newCulture;
            FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(
                System.Windows.Markup.XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));
        }
森末i 2024-11-10 18:16:09

更改后面代码中的语言怎么样?

this.Language = XmlLanguage.GetLanguage(Thread.CurrentThread.CurrentCulture.Name);

How about changing the lanaguge in the code behind?

this.Language = XmlLanguage.GetLanguage(Thread.CurrentThread.CurrentCulture.Name);
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