C # String

Reference type string commonly used for

1. Determine if a string is included

String A= "I ABCDEFG Love You";

Contains ("string");

BOOL Result=a.contais ("ABCDEFG")

Returns: true;

2. Splitter Split intercept field

String b= "ABCDEF&FGHIJ&KLMN";

string [] C=b.split ("&");

C[0]= "ABCdef";

C[1]= "Fghij";

C[2]= "KLMN";

3. Methods for connecting strings.

3.1 Concat

String stra= "Hello";

String strb= "world!";

String Newstr= ""; Here by the way remind yourself of string str=null;string str= ""; In a word, the former does not allocate memory, and the latter opens up a "" memory space for Str.

Newstr=concat (Stra, "", STRB);

Output value: Hello world!

3.2Join

String stra= "Hello";

String strb= "world!";

String Newstr= "";

String[] A={STRA,STRB};

Newstr=string.join ("", a);

Output value: Hello word!

3.3 "+" it's not going to be said, because it's got to come together.

4. There is a split has the connection pit is also inserted insert (int insertindex,string value), the index is starting from 0

4.1 String stra= "Hello";

String strb= "world!";

String Newstr= "";

Newstr=stra. Insert (1,STRB);

Output value: Hworld!ell

5. Delete Remove () deletes the specified number of characters starting at the point where the string was established.

Remove (int stratindex,int count)

String stra= "Hello";

String Newstr= "";

Newstr=stra. Remove (1,3);

Output value: Ho

Also remembered A, Trim (); TrimStart (); TrimEnd (); Remove the empty string.

6. Replacing replace ();

Replace (char Oldchar,char Newchar);

String stra= "Hello";

String Newstr= "";

Newstr=stra. Replace ("ll", "R");

Output: Hero

7. Change the case

ToUpper ();

ToLower ();

　　　　

　　　　　　　

　　　　

C # String