C#中一些字符串操作的常用用法 fuxingboy（转贴）

关键字 C# 字符串操作

出处 http://www.wrclub.net/study/listarticle.aspx?id=1235

//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");