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)
10                    {
11                        case UnicodeCategory.OtherLetter:
12                            strLength += 3;
13                            break;
14                        case UnicodeCategory.UppercaseLetter:
15                            strLength += 2;
16                            break;
17                        default:
18                            strLength += 1;
19                            break;
20                    }
21                }
22            }
23            return strLength;
24        }
25