C#常用字符串操作

//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 = "woshi蓝蓝";　　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("蓝蓝");

/

补充：

string --> byte array

byte[] data=Syste.Text.Encoding.ASCII.GetBytes(string);

string --> byte

byte data = Convert.ToByte(string);

byte[]-->string

string string = Encoding.ASCII.GetString( bytes, 0, nBytesSize );