我的输入日期是字符串类型，我想验证日期？ [英] My input date is string type and I wanted to validate date?

问题描述

在我的代码中，我想确认输入日期不大于当前日期，输入日期是正确的日期。



我尝试过：



i不知道该怎么办请帮助

In my code i want to validate input date is not greater than current date and input date is correct date.

What I have tried:

i don't have any idea how to do please help

推荐答案

Don; t使用Parse：使用TryParse或TryParseExact。 Parse引发异常是用户犯了一个错误 - 他们这么做，太频繁了 - TryParse版本没有。

Don;t use Parse: use TryParse or TryParseExact. Parse throws an exception is the user makes a mistake - which they do, all too frequently - the TryParse versions don't.

DateTime dt;
if (!DateTime.TryParse(inputString, out dt))
   {
   // Report problem to user
   ... 
   return;
   }
if (dt > DateTime.Now.Date)
   {
   // In the future
   ...
   return;
   }

string date = "2017-08-02";
DateTime myDate = DateTime.Parse(date);
Console.WriteLine("my date is: " + myDate);
		
if (myDate > DateTime.Now)
{
	Console.WriteLine("my date > " + DateTime.Now);
}
else
{
	Console.WriteLine("my date <= " + DateTime.Now);
}

请在此处试用： .NET小提琴 [ ^ ]

另外请参阅： [ datetime-parse ]

Try it out here: Home | .NET Fiddle[^]
Also see: [datetime-parse]

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