2019-6-23-WPF-获得当前输入法语言区域

title	author	date	CreateTime	categories
WPF 获得当前输入法语言区域	lindexi	2019-06-23 11:51:21 +0800	2018-10-12 11:5:41 +0800	WPF

本文告诉大家如何获得 WPF 输入法的语言区域

需要使用 user32 的方法，很简单，请看下面

       [DllImport("user32.dll")] static extern IntPtr GetForegroundWindow();
        [DllImport("user32.dll")] static extern uint GetWindowThreadProcessId(IntPtr hwnd, IntPtr proccess);
        [DllImport("user32.dll")] static extern IntPtr GetKeyboardLayout(uint thread);

        public CultureInfo GetCurrentKeyboardLayout()
        {
            try
            {
                IntPtr foregroundWindow = GetForegroundWindow();
                uint foregroundProcess = GetWindowThreadProcessId(foregroundWindow, IntPtr.Zero);
                int keyboardLayout = GetKeyboardLayout(foregroundProcess).ToInt32() & 0xFFFF;
                return new CultureInfo(keyboardLayout);
            }
            catch (Exception)
            {
                return new CultureInfo(1033); // Assume English if something went wrong.
            }
        }

因为没有提供语言区域变化的事件，所以需要自己写一个循环来获取

在界面添加一个 TextBlock 请看下面

    <Grid>
        <TextBlock x:Name="CeareamearTreseretal" HorizontalAlignment="Center" VerticalAlignment="Center"></TextBlock>
    </Grid>

这样可以在后台代码给一个值

        private async void HairjurNalllairmo()
        {
            while (true)
            {
                await Task.Delay(100);
                CeareamearTreseretal.Text = GetCurrentKeyboardLayout().DisplayName;
            }
        }

这时修改语言区域就可以看到变化

参见 C#: Get current keyboard layout\input language