C # Regular Expressions

I learned C # and spent a long time learning regular expressions during format verification. It took me some time to sort them out for your reference. What are the errors.

　　

Using sysyem. Text. regularexpressions. // The namespace that must be referenced.

Case 1: Verify the phone number

RegEx. ismatch (str_telephone, @ "6 (\ D {3, 4 }-)? \ D {6, 8} $ ");

 

Case 2: Verify the password input conditions

RegEx. ismatch (str_password, @ "[A-Za-Z] + [0-9]");

 

 

Case 3: Verify the zip code

RegEx. ismatch (str_postalcode, @ "^ \ D {6} $ ");

 

 

Case 4: Verify the mobile phone number

RegEx. ismatch (str_handset, @ "^ [1] [3-5] \ D {9} $ ");

 

 

Case 5: Verify the ID card number

RegEx. ismatch (str_idcard, @ "(^ \ D {18 }$ | ^ \ D {15} $ ");

 

 

Case 6: Verify two decimal places

RegEx. ismatch (str_decimal, @ "^ [0-9] + \. [0-9] {2} $ ");

 

 

Case 7: Verify the month of the year

RegEx. ismatch (str_month, @ "^ (0? [[1-9] | 1 [0-2] $ ");

 

 

Case 8: Verify the day of the month

RegEx. ismatch (str_day, @ "^ (0? [[1-9] | (1 | 2) [0-9]) | 30 | 31) $ ");

 

 

Case 9: Verify Digital Input

RegEx. ismatch (str_number, @ "^ [0-9] * $ ");

 

 

Case 10: Verify the password length

RegEx. ismatch (str_length, @ "^ \ D {6-18} $ ");

 

 

Case 11: verifying a non-zero positive integer

RegEx. ismatch (str_intnumber, @ "^ \ +? [1-9] [0-9] * $ ");

 

 

Case 12: verifying a non-zero negative integer

RegEx. ismatch (str_intnumber, @ "^ \-? [1-9] [0-9] * $ ");

 

 

Case 13: Verify uppercase letters

RegEx. ismatch (str_upchar, @ "^\ [A-Z] + $ ");

 

 

Case 14: Verify lowercase letters

RegEx. ismatch (str_upchar, @ "^ \ [A-Z] + $ ");

 

 

Case 15: Check repeated words

 

 

 

Case 16: replace characters

 

 

 

Case 17: Split strings

String [] _ STR = RegEx. Split (txtsplit. Text, "[1-9]");

 

Case 18: Verify input characters

RegEx. ismatch (str_letter, @ "^ [A-Za-Z] + $ ");

 

 

Case 19: Verify Chinese Character Input

RegEx. ismatch (str_chinese, @ "^ [\ u4e00-\ u9fa5] {1,} $ ");

 

 

Case 20: Verify the input string

RegEx. ismatch (str_length, @ "^ [. {8, }$ ");

 

 

 

Case 2: Verify the email format

RegEx. ismatch (str_email,

@ "^ ([\ W \.] +) @ ([0-9] {1, 3 }\. [0-9] {1, 3 }\. [0-9] {1, 3}]) | (\ W + \.?) +) @ ([A-Za-Z] {2, 4} | [0-9] {1, 3 })(\. [A-Za-Z] {2, 4}) $ ");

 

 

 

Case 2: Verify the email format

Public bool ipcheck (string IP)

{

String num = @ "(25 [0-5] | 2 [0-4] \ d | [0-1] \ D {2} | [1-9]? \ D )";

Return RegEx. ismatch (IP, ("^" + num + "\." + num + "\." + num + "$ "));

}

 

 

Case 2 3: Verify the URL format

 

RegEx. ismatch (str_url, @ "HTTP (s )? // ([\ W-] + \.) + [\ W-] + (/[\ W -./? % & =] *)? ");