转换时间字符串以附加DateTime对象

Question

I have a time string as 12:48 AM . I want to convert this string into TimeSpan to append with DateTime Object. Currently I am trying the following snippets.

string format = "dd/MM/yyyy";
CultureInfo provider = CultureInfo.InvariantCulture;
var date = DateTime.ParseExact(dateValue, format, provider);

string timeFormate = "H:mm AM";
string timeValue = "12:48 AM";
var time = TimeSpan.ParseExact(timeValue,timeFormate,provider);
DateTime launchDate = date + time;

I am getting

Input string was not in a correct format

exception at line

 var time = TimeSpan.ParseExact(timeValue,timeFormate,provider);

Please suggest me how to convert my specified string into time.

Answer 1

You need to parse that time into DateTime and then simply extract the TimeOfDay out of it when appending to the original date:

using System;
using System.Globalization;

namespace Sample
{
    class Program
    {
        static void Main(string[] args)
        {
            var dateValue = "10/03/1987";
            var date = DateTime.ParseExact(dateValue, "dd/MM/yyyy", CultureInfo.InvariantCulture);

            var timeValue = "12:48 AM";
            var time = DateTime.ParseExact(timeValue, "h:mm tt", CultureInfo.InvariantCulture);

            var dateTime = date + time.TimeOfDay;

            Console.WriteLine(date);
            Console.WriteLine(time);
            Console.WriteLine(dateTime);
        }
    }
}

OUTPUT:

3/10/1987 12:00:00 AM
11/12/2014 12:48:00 AM
3/10/1987 12:48:00 AM

Answer 2

You can parse it to DateTime and use it's TimeOfDay property to get the time:

DateTime time = DateTime.ParseExact("12:48 AM", "h:mm tt", CultureInfo.InvariantCulture);
DateTime launchDate = date + time.TimeOfDay;

Note that i've also changed the format string since you need tt for the AM/PM designator.

Answer 3

12:48 AM is not a TimeSpan , it is a time part of a DateTime . You need to parse it to DateTime , not TimeSpan .

You can use to add .TimeOfDay property of your time and add it to date . This property returns only time part of your DateTime as a TimeSpan .

string timeValue = "12:48 AM";
var time = DateTime.ParseExact(timeValue, "h:mm tt", CultureInfo.InvariantCulture);
DateTime launchDate = date + time.TimeOfDay;

Answer 4

Check this Page from MSDN, this could help u

http://msdn.microsoft.com/en-us/library/dd992370(v=vs.110).aspx

Answer 5

If you want a DateTime object

 string timeValue = "10:48 AM";
 string timeFormate = "h:mm tt";
 var dateTime = DateTime.ParseExact(timeValue, timeFormate, CultureInfo.InvariantCulture);

edit: if you want to add a timespan to a given DateTime object you should skip the "AM/PM"

string timeValue = "2:30";
DateTime launchTime = DateTime.Now;
TimeSpan timeSpan;
if (TimeSpan.TryParse(timeValue, out timeSpan))
{
   launchTime = launchTime.Add(timeSpan);
}

BR