日语Windows OS上的C＃应用​​程序-以全角字符显示拉丁语 [英] C# application on Japanese Windows OS - Present Latin as Full-Width characters

问题描述

我有一个C＃winform应用程序，该应用程序安装在日语Windows 7上。
有些标签显示的字体非常宽，导致它们的字体大小不正确。

I have a C# winform application, that is installed on a Japanese windows 7. Some of the labels are presented with a very wide fonts, causing them to not mach the size of the from.

经过一些研究，我被告知可能是半角/全角问题。
是否有任何办法可以强制所有字符串显示为半角宽度？

After some research I was told it might be a half/full width issue. Has it any way to force all strings to be presented as Half width?

例如，此部分显示不正确：

For example, this part is not shown correctly:

modelSizeLabel.Text = String.Format("X:{0:0.0},Y:{1:0.0},Z:{2:0.0} [{3}]", 
                (Model.BBox.dx),
                (Model.BBox.dy),
                (Model.BBox.dz - Model.Sink),
                uc.To.ToString() //units enum
                );

推荐答案

基本上我知道有2种方法宽度的字母：

Basically there are 2 approaches I know to deal with full-width letters:

1。使用 String.Normalize（）方法

1. Using String.Normalize() method

此方法使用标准的 Unicode归一化将全角（zenkaku）转换为半角（hankaku）时的形式：

This approach uses standard Unicode normalization forms when converting full-width (zenkaku) to half-width (hankaku):

public static string ToHalfWidth(string fullWidth)
{
    return fullWidth.Normalize(System.Text.NormalizationForm.FormKC);
}

NB：这被认为是转换字母，数字和标点符号的最简单方法用日语IME编写的ANSI编码，但我仍然不知道它如何影响任何假名/汉字字母。

NB: This is considered simplest approach to convert letters, numbers and punctuations covered by ANSI encoding written in Japanese IME, but I still don't know how it impact any kana/kanji letters.

2。使用P / Invoke在kernel32.dll中调用 LCMapString 方法

2. Using P/Invoke to call LCMapString method in kernel32.dll

此方法需要调用外部DLL资源 kernel32.dll 与 API方法 LCMapString ，并在 LCMapStringEx 函数（注意某些标志是互斥的，请归功于 rshepp / John Estropia ）：

This approach requires calling external DLL resource kernel32.dll with API method LCMapString, with flag defined in LCMapStringEx function (note that some flags are mutually exclusive, implementation credit to rshepp/John Estropia):

// edited from /a/40836235
private const uint LOCALE_SYSTEM_DEFAULT = 0x0800;
private const uint LCMAP_HALFWIDTH = 0x00400000;

[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
private static extern int LCMapString(uint Locale, uint dwMapFlags, string lpSrcStr, int cchSrc, StringBuilder lpDestStr, int cchDest);

public static string ToHalfWidth(string fullWidth, int size)
{
    StringBuilder sb = new StringBuilder(size);
    LCMapString(LOCALE_SYSTEM_DEFAULT, LCMAP_HALFWIDTH, fullWidth, -1, sb, sb.Capacity);
    return sb.ToString();
}

用法示例：

// by default Japanese IME automatically convert all vocal letters to respective kana letters, 
// so I used consonants except "n"
Label1.Text = ToHalfWidth("０１２３４５６７８９ｂｃｄｆｇｈｊｋｌｍｐｑｒｓｔｖｗｘｙｚ");
Label2.Text = ToHalfWidth("０１２３４５６７８９ｂｃｄｆｇｈｊｋｌｍｐｑｒｓｔｖｗｘｙｚ", 256);

PS：您可以将以上两种方法包装在一个helper / service类中，以在同一名称空间中使用。

PS: You can wrap both methods above in a helper/service class for usage across the same namespace.

相关问题：

在C＃中将zenkaku字符转换为hankaku，反之亦然

转换单字节字符串（半角）到双字节（全角）

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