我需要一种方法来处理所有大写单词，我喜欢Ricky AH的解决方案，但我进一步将其实现为扩展方法。这避免了必须创建字符数组然后每次显式调用ToArray的步骤-所以你可以只在字符串上调用它，如下所示:

用法:

string newString = oldString.ToProper();

代码:

public static class StringExtensions
{
    public static string ToProper(this string s)
    {
        return new string(s.CharsToTitleCase().ToArray());
    }

    public static IEnumerable<char> CharsToTitleCase(this string s)
    {
        bool newWord = true;
        foreach (char c in s)
        {
            if (newWord) { yield return Char.ToUpper(c); newWord = false; }
            else yield return Char.ToLower(c);
            if (c == ' ') newWord = true;
        }
    }

}

我使用了上面的参考，一个完整的解决方案是:

Use Namespace System.Globalization;
string str = "INFOA2Z means all information";

//需要类似"Infoa2z意味着所有信息"的结果 //我们也需要转换小写的字符串，否则它不能正常工作。

TextInfo ProperCase = new CultureInfo("en-US", false).TextInfo;

str = ProperCase.ToTitleCase(str.toLower());

在ASP中更改字符串为正确的大小写。NET使用c#

MSDN: TextInfo。ToTitleCase

确保你包括:使用系统。全球化

string title = "war and peace";

TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //War And Peace

//When text is ALL UPPERCASE...
title = "WAR AND PEACE" ;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //WAR AND PEACE

//You need to call ToLower to make it work
title = textInfo.ToTitleCase(title.ToLower()); 
Console.WriteLine(title) ; //War And Peace

String TitleCaseString(String s)
{
    if (s == null || s.Length == 0) return s;

    string[] splits = s.Split(' ');

    for (int i = 0; i < splits.Length; i++)
    {
        switch (splits[i].Length)
        {
            case 1:
                break;

            default:
                splits[i] = Char.ToUpper(splits[i][0]) + splits[i].Substring(1);
                break;
        }
    }

    return String.Join(" ", splits);
}

如果有人对Compact Framework的解决方案感兴趣:

return String.Join(" ", thestring.Split(' ').Select(i => i.Substring(0, 1).ToUpper() + i.Substring(1).ToLower()).ToArray());

首先使用ToLower()，然后对结果使用CultureInfo.CurrentCulture.TextInfo.ToTitleCase以获得正确的输出。

    //---------------------------------------------------------------
    // Get title case of a string (every word with leading upper case,
    //                             the rest is lower case)
    //    i.e: ABCD EFG -> Abcd Efg,
    //         john doe -> John Doe,
    //         miXEd CaSING - > Mixed Casing
    //---------------------------------------------------------------
    public static string ToTitleCase(string str)
    {
        return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(str.ToLower());
    }