Comparison of strings in C #

Comparison of character creation in C #

String. Compare (,)

String. Compare (, true) // case insensitive

 

The logic is worth comparing. T.. f.. T. F.

Int A = string. Compare ("1 (. F.)", ". F.", true) result a = 1

Comparison of numbers

Int A = string. Compare ("2 (2)", "2", true) result a = 1

 

Other comparisons (English letters, Chinese characters =)

Int A = string. Compare ("alter", "8 (Alter)", true); Result A = 1

Int A = string. Compare ("logical", "3 (logical)", true); Result A = 1

 

Judge whether it is a string. Use a regular expression.

Using system. Text. regularexpressions;

RegEx r = new RegEx (@ "^/d + (/.)? /D * $ ");

If (R. ismatch (tkanswer_tkt [tkanswer_len])

{

"Is a number"

}

 

Else

{

"Not a number"

}

 

This is just a small achievement today.