CultureInfo.ClearCachedData不起作用。它随机有时有时不工作 [英] CultureInfo.ClearCachedData does not work. It randomly sometimes works sometimes not

问题描述

我想检测区域设置更改，并在WPF应用程序中以正确的格式显示日期。但是CultureInfo.ClearCachedData有一个奇怪的问题。它随机地不是工作。有人知道为什么，为此解决办法吗？我知道区域设置存储在注册表中，但是它是非常原始的，以破译 HKCU\Control Panel\International 的内容，并从中手动构建一个CultureInfo。

I want to detect the regional settings changes and show the dates in the correct format in a WPF application. But there is a strange problem with CultureInfo.ClearCachedData. It randomly either works either not. Does anybody know why, and a workaround for this ? I know that the regional settings are stored in the registry, but it's too primitive to decipher the content of HKCU\Control Panel\International and build a CultureInfo manually from it.

我已经把它放在一个更大的应用程序中，CultureInfo.ClearCachedData的失败率几乎是100％。

I've put this in a bigger application and the rate of CultureInfo.ClearCachedData failure is almost 100% there.

Window1.xaml .cs：

Window1.xaml.cs:

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Interop;

namespace WpfApplication1
{
    partial class Window1 : Window
    {
        int i = 0;

        public Window1()
        {
            InitializeComponent();
            ShownCurrentCulture();
            Loaded += (x, y) => HwndSource.FromHwnd(
                new WindowInteropHelper(this).Handle).AddHook(WndProc);
        }

        IntPtr WndProc(IntPtr hwnd, int msg,
            IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            if (msg == 0x1a) // WM_SETTINGCHANGE
            {
                // CultureInfo.CurrentCulture is sometimes changed,
                // sometimes not
                ShownCurrentCulture();
            }
            return IntPtr.Zero;
        }

        void ShownCurrentCulture()
        {
            CultureInfo.CurrentCulture.ClearCachedData();
            Title = i++ + " " + CultureInfo.CurrentCulture;
        }
    }
}

推荐答案

经过一些更多的试验，我发现只有新创建的线程才能正确地获得更新的文化。 CultureInfo.CurrentCulture在旧线程上随机返回旧的（Thread.CurrentThread.CurrentCulture）或更新的文化。

After some more trials I found out that only the newly created threads get the updated culture correctly. CultureInfo.CurrentCulture on an old thread returns randomly either the old (Thread.CurrentThread.CurrentCulture) or the updated culture.

如果Thread.CurrentThread.CurrentCulture被修改，文化信息.CentrentCulture在调用ClearCachedData之后不会得到更新，否则将被更新。

Probably if Thread.CurrentThread.CurrentCulture was modified, CultureInfo.CurrentCulture won't get updated on that tread after a call to ClearCachedData, otherwise it gets updated.

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