c# - 从字符串创建日期时间

Question

我需要用 HH:MM:SS + 当前日期创建一个 DateTime

string myTime = "08:50:00";
DateTime currentDateTime = DateTime.UtcNow.date;

结果应该是结合了这些信息的 DateTime。怎么做 ？

Answer 1

您需要使用ParseExact- http://msdn.microsoft.com/en-us/library/w2sa9yss.aspx

所以：

var provider = CultureInfo.InvariantCulture;
var date = DateTime.ParseExact(myTime,"hh:mm:ss",provider);

它应该使用当前日期作为日期部分。

Answer 2

这是你想要的吗：

DateTime dateTime = DateTime.Today + TimeSpan.Parse(myTime);

Answer 3

string myDateTimeString;  
DateTime dt;   
dt = Convert.ToDateTime(myDateTimeString); 
Response.Write(dt.Day + "/" + dt.Month + "/" + dt.Year);  

见http://www.ezineasp.net/post/C-Convert-String-to-DateTime.aspx

Answer 4

你可以尝试类似的东西

  const string myTime = "08:50:00";
  DateTime now = DateTime.Now;
  string[] split = myTime.Split(':');
  DateTime dt = new DateTime(now.Year, now.Month, now.Day, int.Parse(split[0]), int.Parse(split[1]), int.Parse(split[2]));

但是您应该添加一些空值检查和其他验证。

Answer 5

string myTime = "08:50:00";
                DateTime currentDateTime = DateTime.UtcNow.Date;
               string myDateTime = string.Format("{0}-{1}-{2} {3}", currentDateTime.Year, currentDateTime.Month, currentDateTime.Day,
                              myTime);

               DateTime dt = Convert.ToDateTime(myDateTime, new CultureInfo("en-GB"));

                //or
                DateTime myNewDatetime = new DateTime(currentDateTime.Year, currentDateTime.Month, currentDateTime.Day,
                                                      8, 50, 0);