asp.net common String processing method _ Practical skills

String Fox;
Fox. ToLower () into lowercase letters
Fox. ToUpper () into uppercase letters
Fox. Trim () Remove space before and after
Fox. Trim (TrimChars) Remove other characters
Fox. TrimStart () Remove before space
Fox. TrimEnd () Delete space after
Fox. PadLeft (10) adds the left space so that the string reaches a certain length.
Fox. PadRight (10) adds the right space so that the string reaches a certain length.
Fox. PADX (10, '-') adds additional characters so that the string reaches a certain length. X means: Left/right
Fox. Split (") to decompose strings into groups

System.Text.Encoding.Default.GetByteCount (Fox); Get string length, one character equals two characters

Acquiring the location code of Chinese characters
byte[] array = new BYTE[2];
Array = System.Text.Encoding.Default.GetBytes ("Ah");

int i1 = (short) (Array[0]-' ");
int i2 = (short) (Array[1]-' ");

Chinese character code under the Unicode decoding method
Array = System.Text.Encoding.Unicode.GetBytes ("Ah");
I1 = (short) (Array[0]-' ");
I2 = (short) (Array[1]-' ");

Unicode reverse decoding to Chinese characters
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 mode reverse decoding for Chinese characters
Array[0] = (byte) 196;
ARRAY[1] = (byte) 207;
s = System.Text.Encoding.Default.GetString (array);