String processing-related usage, string-related usage

String processing-related usage, string-related usage

 First, define a string:

String str = "abc ";

1. case-insensitive conversion of Characters

Uppercase: str. ToUpper ();

Lower case: str. ToLower ();

2. Conversion of characters and Ascii codes

Ascii code: byte [] B = Encoding. GetEncoding ("unicode"). GetBytes (str );
String: string s = B [0]. ToString ();

3. Conversion of Chinese character location codes

The location code of a Chinese character is a four-digit decimal number. The first two are the location code, and the last two are the location code.

Now we need a Chinese character string

String c = "I ";

Bytebyte [] B = Encoding. Default. GetBytes (str );
Short font = (short) (B [0]-'\ 0 ');

Short back = (short) (B [1]-'\ 0 ');
String s = (font-160). ToString () + (back-160). ToString ();