字符串未被识别为有效的日期时间格式 [英] String was not recognized as a valid datetime format

问题描述

我的日期为int，我从文件字段中将文件名和时间作为字符串。



我正试图获取根据字符串格式的预期输出。我收到错误，字符串未被识别为有效的日期时间格式



如有任何帮助，请提前感谢。



我尝试过：

 DateTime DTTM; 
  int  crdt =  20180418 ; 
  string  time =   15:20： 37.6789; 
 DTTM = DateTime.ParseExact（crdt +   + time，  yyyy-MM-dd HH：mm：ss.FFFF tt，CultureInfo.InvariantCulture）; 

预计输出：2018-04-18 15：20：37.6789 PM

解决方案

显然你的字符串与您的格式不符。 你不想使用这种格式吗？



yyyyMMdd HH：mm：ss.FFFF



/ ravi

DateTime.ParseExact（）没有接受INT作为参数的方法

System.DateTime.ParseExact < a href =https://msdn.microsoft.com/en-us/library/system.datetime.parseexact(v=vs.110).aspx> [ ^ ]



有些方法不喜欢方法中的INT，即使它在执行时被连接成一个字符串。



最好的选择是提前字符串化，也许这样可行：

 DateTime DTTM; 
  int  crdt =  20180418 ; 
  string  time =   15:20： 37.6789; 
 
  //   new  
  string  timestring = crdt.ToString（）+ time; 
 
  //  已更改 
 DTTM = DateTime.ParseExact（timestring ，  yyyyMMdd HH：mm：ss.FFFF，CultureInfo.InvariantCulture）; 

I have date as int, which I'm taking it from the filename and time from the file field as a string.

I'm trying to get the expected output as per the string format. I'm getting error that string was not recognized as a valid datetime format

Any help is appreciated, Thank you in advance.

What I have tried:

DateTime DTTM; 
int crdt = 20180418; 
string time = "15:20:37.6789" ;
 DTTM = DateTime.ParseExact(crdt + " " + time, "yyyy-MM-dd HH:mm:ss.FFFF tt", CultureInfo.InvariantCulture);

Expected output : 2018-04-18 15:20:37.6789 PM

解决方案

Clearly your string doesn't match your format.  Don't you want to use this format instead?

yyyyMMdd HH:mm:ss.FFFF

/ravi

DateTime.ParseExact() does not have a method that takes accepts an INT as an argument
System.DateTime.ParseExact[^]

Some methods don't like an INT within the method even though it gets concatenized into a string when executed.

Best bet would be to stringify ahead of time, perhaps this would work:

DateTime DTTM; 
int crdt = 20180418; 
string time = "15:20:37.6789" ;

// new
string timestring= crdt.ToString() + time;

// altered
DTTM = DateTime.ParseExact(timestring, "yyyyMMdd HH:mm:ss.FFFF", CultureInfo.InvariantCulture);

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