Common methods for C # strings (string)

1. Basic characteristics of strings

The length of the string is not to become;

2. Methods of strings

There are many ways to string strings such as: compare (), Trim (), IsNullOrEmpty (), ToUpper (), and so on.

(1). IsNullOrEmpty ();(It is used to determine whether a string is empty. Returns true if NULL is NOT NULL returns FALSE)

string s = "';

if (string. IsNullOrEmpty (s))

{

}

(2). Format ();(It is used for formatting strings);

Grammar:

String Name= "Zhang San";

String age = "12";

string s = String. Format ("I call {0} this year {1} years old.", Name,age);

(3). Contains ();(It is used to determine whether a string contains another string, if it contains returns True, does not include the return false);

string S1 = "Zhang San pay electricity";

String s2 = "Electricity Bill";

if (S1. Contains (S2))

{

}

Else

{

}

(4). ToUpper ();(The English letter of the specified string into uppercase);

Grammar:

string s = "abc"

s =s.toupper ();

(5). ToLower ();(The English letter of the specified string into lowercase);

Grammar:

string s = "ABC"

s =s.tolower ();

Common methods for C # strings (string)