最佳方式

Question

我需要创建一个午夜的DateTime

我只是这样做：

DateTime endTime = DateTime.Now; 
endTime.Subtract(endTime.TimeOfDay); 

还没有测试它，我假设它的工作原理但有没有更好的/更清洁的方式？

Answer 1

只是使用foo.Date，或DateTime.Today为今天的日期

Answer 2

DateTime.Today

Answer 3

DateTime.Now.AddDays（1）.Date

Answer 4

DateTime endTime = DateTime.Now.Date; 

现在endTime.TimeOfDay.ToString()回报"00:00:00"

Answer 5

你可以使用DateTime.Today与午夜的确切秒数。

DateTime today = DateTime.Today; 
    DateTime mid = today.AddDays(1).AddSeconds(-1); 
    Console.WriteLine(string.Format("Today: {0} , Mid Night: {1}", today.ToString(), mid.ToString())); 

    Console.ReadLine(); 

这应该打印：

Today: 11/24/2016 10:00:00 AM , Mid Night: 11/24/2016 11:59:59 PM 

Answer 6

private bool IsServiceDatabaseProcessReadyToStart() 
    { 
     bool isGoodParms = true; 
     DateTime currentTime = DateTime.Now; 
     //24 Hour Clock 
     string[] timeSpan = currentTime.ToString("HH:mm:ss").Split(':'); 
     //Default to Noon 
     int hr = 12; 
     int mn = 0; 
     int sc = 0; 

     if (!string.IsNullOrEmpty(timeSpan[0])) 
     { 
      hr = Convert.ToInt32(timeSpan[0]); 
     } 
     else 
     { 
      isGoodParms = false; 
     } 

     if (!string.IsNullOrEmpty(timeSpan[1])) 
     { 
      mn = Convert.ToInt32(timeSpan[1]); 
     } 
     else 
     { 
      isGoodParms = false; 
     } 

     if (!string.IsNullOrEmpty(timeSpan[2])) 
     { 
      sc = Convert.ToInt32(timeSpan[2]); 
     } 
     else 
     { 
      isGoodParms = false; 
     } 

     if (isGoodParms == true) 
     { 
      TimeSpan currentTimeSpan = new TimeSpan(hr, mn, sc); 
      TimeSpan minTimeSpan = new TimeSpan(0, 0, 0); 
      TimeSpan maxTimeSpan = new TimeSpan(0, 04, 59); 
      if (currentTimeSpan >= minTimeSpan && currentTimeSpan <= maxTimeSpan) 
      { 
       return true; 
      } 
      else 
      { 
       return false; 
      } 
     } 
     else 
     { 
      return false; 
     } 
    }