[摘]C#中一些字符串操作的常用用法

//获得汉字的区位码
   byte[] array = new byte[2];
   array = System.Text.Encoding.Default.GetBytes("啊");

int i1 = (short)(array[0] - '\0');
   int i2 = (short)(array[1] - '\0');

//unicode解码方式下的汉字码
   array = System.Text.Encoding.Unicode.GetBytes("啊");
   i1 = (short)(array[0] - '\0');
   i2 = (short)(array[1] - '\0');

//unicode反解码为汉字
   string str = "4a55";
   string s1 = str.Substring(0,2);
   string s2 = str.Substring(2,2);

int t1 = Convert.ToInt32(s1,16);
   int t2 = Convert.ToInt32(s2,16);

array[0] = (byte)t1;
   array[1] = (byte)t2;

string s = System.Text.Encoding.Unicode.GetString(array);

//default方式反解码为汉字
   array[0] = (byte)196;
   array[1] = (byte)207;
   s = System.Text.Encoding.Default.GetString(array);

//取字符串长度
   s = "iam方枪枪";
   int len = s.Length;//will output as 6
   byte[] sarr = System.Text.Encoding.Default.GetBytes(s);
   len = sarr.Length;//will output as 3+3*2=9

//字符串相加
   System.Text.StringBuilder sb = new System.Text.StringBuilder("");
   sb.Append("i ");
   sb.Append("am ");
   sb.Append("方枪枪");

posted on 2008-08-15 20:02  Ariel Yang  阅读(215)  评论(0编辑  收藏  举报

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