本文实例讲述了C#使用正则表达式实现首字母转大写的方法。分享给大家供大家参考，具体如下：
class Program
{
static void Main(string[] args)
{
// Input strings.
const string s1 = "samuel allen";
const string s2 = "dot net perls";
const string s3 = "Uppercase first letters of all words in the string.";
// Write output strings.
Console.WriteLine(TextTools.UpperFirst(s1));
Console.WriteLine(TextTools.UpperFirst(s2));
Console.WriteLine(TextTools.UpperFirst(s3));
Console.ReadKey();
}
}
public static class TextTools
{
/// <summary>
/// Uppercase first letters of all words in the string.
/// </summary>
public static string UpperFirst(string s)
{
return Regex.Replace(s, @"\b[a-z]\w+", delegate(Match match)
{
string v = match.ToString();
return char.ToUpper(v[0]) + v.Substring(1);
});
}
}
希望本文所述对大家C#程序设计有所帮助。