获取字符串（包括汉字）的长度

参考：http://msdn.microsoft.com/zh-cn/library/system.globalization.unicodecategory.aspx

 1      public static int GetStringLengthByChar(String origin)
 2        {
 3            Int32 strLength = 0;
 4            if(!String.IsNullOrEmpty(origin))
 5            {
 6                foreach (char c in origin)
 7                {
 8                    UnicodeCategory testC = char.GetUnicodeCategory(c);
 9                    switch (testC)
                    {
                        case UnicodeCategory.OtherLetter:
                            strLength += 3;
                            break;
                        case UnicodeCategory.UppercaseLetter:
                            strLength += 2;
                            break;
                        default:
                            strLength += 1;
                            break;
                    }
                }
            }
            return strLength;
        }