Common regular expression statements in ASP. NET

The article has added a collection of regular expressions that are often used in development applications ~ Z English letters (case insensitive), 0 ~ 9 is composed of digits, dots, minus signs or Underscores. It must be a number, an email format, and a 24-hour matching time.

1. The account is composed of ~ Z English letters (case insensitive), 0 ~ 9 is composed of numbers, points, minus signs, or Underscores. The length is 3 ~ 18 characters, for example, kyzy_001

^ [A-Za-z0-9.-_] {} $

2. The input box must contain numbers.

^ [0-9] {1,} $

3. Email format

W + ([-+.] w +) * @ w + ([-.] w +) *. w + ([-.] w + )*

4. Only two decimal numbers can be entered in the text box.

^ [0-9] +. [0-9] {0, 2} $

Match the time in the 24-hour format

(? <Hour> [0-2] {1} d {1 }):(? <Min> [1-6] {1} d {1 })
Match the standard monthly/annually Crystal format
^ (0 [48]) | ([13579] [26]) | ([2468] [048]) 00) | ([0-9] [0-9] (0 [48]) | ([13579] [26]) | ([2468] [048]) -02-29) | (000 [1-9]) | (00 [1-9] [0-9]) | (0 [1-9] [0-9] [0-9]) | ([1-9] [0-9] [0-9] [0-9])-(0 [13578]) | (1 [02])-31) | (0 [1, 3-9]) | (1 [0-2])-(29 | 30 )) | (0 [1-9]) | (1 [0-2])-(0 [1-9]) | (1 [0-9]) | (2 [0-8]) $

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^ D {5} $

Five numeric numbers, such as the US postal code.

^ (D {5}) | (d {5}-d {4} $

5 numeric or 5 Numeric-dashes-4 numeric. Match the United States postal code in 5-digit format, or the United States postal code in 5-digit + 4-digit format.

^ (D {5} (-d {4 })? $

Same as the previous one, but more effective. Use? The four digits in the mode can be used as the optional part, instead of comparing two different modes (in another way ).

^ [+-]? D + (. d + )? $

Matches any real number with an optional symbol.

^ [+-]? D *.? D * $

It is the same as the previous one, but it also matches an empty string.

^ (20 | 21 | 22 | 23 | [01] d): [0-5] d $

Matches the time value in the 24-hour format.

/*.**/

Matching c-style comments /*...*/

 

Regular expression for date and time judgment
This is to judge the format of yyyy-mm-dd, basically taking into account the leap year and February.

^ (1 [6-9] | [2-9] d) d {2})-(0? [1, 13578] | 1 [02])-(0? [1-9] | [12] d | 3 [01]) | (1 [6-9] | [2-9] d) d {2 }) -(0? [13456789] | 1 [012])-(0? [1-9] | [12] d | 30) | (1 [6-9] | [2-9] d) d {2})-0? 2-(0? [1-9] | 1d | 2 [0-8]) | (1 [6-9] | [2-9] d) (0 [48] | [2468] [048] | [13579] [26]) | (16 | [2468] [048] | [3579] [26]) 00)-0? 2-29-) $

The following is a time verification

^ (1 [6-9] | [2-9] d) d {2})-(0? [1, 13578] | 1 [02])-(0? [1-9] | [12] d | 3 [01]) | (1 [6-9] | [2-9] d) d {2 }) -(0? [13456789] | 1 [012])-(0? [1-9] | [12] d | 30) | (1 [6-9] | [2-9] d) d {2})-0? 2-(0? [1-9] | 1d | 2 [0-8]) | (1 [6-9] | [2-9] d) (0 [48] | [2468] [048] | [13579] [26]) | (16 | [2468] [048] | [3579] [26]) 00)-0? 2-29-) (20 | 21 | 22 | 23 | [0-1]? D): [0-5]? D: [0-5]? D $