C ＃ switch between Chinese and English input methods

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Original author ： Tang, song, yuan, Ming and Qing Dynasties

Original address ：https://www.cnblogs.com/kybs0/p/10298697.html

C# Switch between Chinese and English input method

When entering in the interface , Sometimes it is necessary to restrict the input method .

Without customizing regular expressions or other input processing , Match the current language bar when switching between Chinese and English , There are several system schemes as follows ：

InputLanguage programme

• Use System.Windows.Forms.InputLanguage^[1], Judge / Set the current ime state ;

• Get the current input method

/// <summary>
    ///  Get the current input method 
    /// </summary>
    /// <returns></returns>
    private string GetCultureType()
    {
        var currentInputLanguage = InputLanguage.CurrentInputLanguage;
        var cultureInfo = currentInputLanguage.Culture;
        // Same as  cultureInfo.IetfLanguageTag;
        return cultureInfo.Name;
    }

• Switch input method

/// <summary>
    ///  Switch input method 
    /// </summary>
    /// <param name="cultureType"> Language item , Such as zh-CN,en-US</param>
    private void SwitchToLanguageMode(string cultureType)
    {
        var installedInputLanguages = InputLanguage.InstalledInputLanguages;

        if (installedInputLanguages.Cast<InputLanguage>().Any(i => i.Culture.Name == cultureType))
        {
            InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(System.Globalization.CultureInfo.GetCultureInfo(cultureType));
            CurrentLanguage = cultureType;
        }
    }

adopt InputLanguage Set up , It can unify input methods in the same process . For example, after switching to English input method , The current program cycle has been in English input status .

InputMethod Additional attributes

System.Windows.Input.InputMethod,API The notes given in the original text are ：

You can provide a framework for managing and using text Services , It provides alternate text , Such as the interactive functions supported by voice and handwriting input methods

1） InputMethod There are dependent properties under PreferredImeConversionMode, You can limit the input character type , At the same time, switch the Chinese and English status of the language bar .

• This property sets the limit input character , The input method can be switched manually , Switch back to another input method .

2）InputMethod.IsInputMethodEnabled, You can also set the limit of Chinese and English input methods

• Once set , The input method of the input control cannot be switched manually . Unless reset IsInputMethodEnabled value .

InputMethod Suitable for the program cycle , Different input boxes have different input methods .

For example, the input method of the following two text boxes is limited ：

// adopt InputMethod.PreferredImeConversionMode Additional attributes , Set the input method input conversion mode of the input box , That is, limit the input character type 
     InputMethod.SetPreferredImeConversionMode(InputTestTextBox0, ImeConversionModeValues.Alphanumeric);
     InputMethod.SetPreferredImeConversionMode(InputTestTextBox1, ImeConversionModeValues.Native);

ImeConversionModeValues The list of enumeration values is as follows ：

/// <summary> Describes an input method input conversion mode to be performed .</summary>
  [Flags]
  public enum ImeConversionModeValues
  {
    /// <summary> The input method uses native characters  （ Hiragana 、  Korean 、  Traditional Chinese ）  Conversion mode .</summary>
    Native = 1,
    /// <summary> The input method uses Katakana conversion mode .</summary>
    Katakana = 2,
    /// <summary> The input method uses the Holomorphic transformation mode .</summary>
    FullShape = 4,
    /// <summary> The input method uses Roman character conversion mode .</summary>
    Roman = 8,
    /// <summary> The input method uses the character code conversion mode .</summary>
    CharCode = 16, // 0x00000010
    /// <summary> The input method does not perform any input conversion .</summary>
    NoConversion = 32, // 0x00000020
    /// <summary> Input method usage  EUDC （ End user defined characters ）  Conversion mode .</summary>
    Eudc = 64, // 0x00000040
    /// <summary> The input method uses the symbol conversion mode .</summary>
    Symbol = 128, // 0x00000080
    /// <summary> The input method uses a fixed conversion mode .</summary>
    Fixed = 256, // 0x00000100
    /// <summary> The input method uses alphanumeric conversion mode .</summary>
    Alphanumeric = 512, // 0x00000200
    /// <summary> The input method does not care which input conversion method is used ; The actual conversion method is uncertain .</summary>
    DoNotCare = -2147483648, // -0x80000000
  }

Of the above two schemes Demo Source code ^[2]：

PS： If it is winform Program , It can be set directly Control.ImeMode attribute

Reference resources ^[3]

Reference material

[1]

System.Windows.Forms.InputLanguage: https://docs.microsoft.com/zh-cn/dotnet/api/system.windows.forms.inputlanguage?view=netframework-4.7.2

[2]

Demo Source code : https://github.com/Kybs0/InputLanguageTestDemo

[3]

Please refer to : https://blog.csdn.net/iluna/article/details/4903479