使用Regex仅验证一个月 [英] Validate only month using Regex

问题描述

大家好

字符串item1 ="06/14/2012";(MM/dd/yyyy)formate

hi all

string item1 = "06/14/2012";(MM/dd/yyyy)formate

//this is validate the year using Regex
 if (Regex.IsMatch(date, @".*/\s*2012", RegexOptions.CultureInvariant))
{
//adding year
}
//if i want to validate month how can i do.?
//in item1 is datetime.
//if i validate item1 how can i know this is particular month
//?

在item1中是日期时间.
如果我验证item1，我怎么知道这是特定月份?


在这里，我只想使用Regex验证几个月.


我该如何执行此功能.

让我知道......

in item1 is datetime.
if i validate item1 how can i know this is particular month?


here i want to validate only months using Regex.


how can i do this functionality.

let me know......

推荐答案

为什么不使用DateTime.TryParseExact [

Why not use the DateTime.TryParseExact[^] method to validate the date.

string date = "06/14/2012"; //(MM/dd/yyyy)format
            DateTime dateResult;

            if (DateTime.TryParseExact(date, "MM/dd/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dateResult))
            {
                Console.WriteLine("This is a valid date.");
            }

我根本不会使用正则表达式-使用DateTime.tryParseExact验证很多正则表达式要容易得多:

I wouldn''t use a regex at all - it is a whole lot easier to validate the lot with a DateTime.tryParseExact:

string s = "06/14/2012";
DateTime dt;
if (DateTime.TryParseExact(s, "MM/dd/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dt))
    {
    }

您未在格式字符串中指定的任何内容都会被默认设置.

Anything you don''t specify in the format string will be defaulted.

您可以使用此正则表达式来验证月份:"^(0?[1-9] | 1 [012] )

You can use this regex for validating month: "^(0?[1-9]|1[012])

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