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VB.Net: Substract Time from a date (hours, minutes, seconds)
From Wiki
It seem a bit strange but to substract you have to add.
look at the code to find out more.
- Module Module1
- Sub Main()
- Dim _Date As New Date(2008, 6, 12, 12, 12, 12)
- Console.WriteLine("begin")
- Console.WriteLine(_Date.ToString("dd/MM/yyyy HH/mm/ss"))
- _Date = _Date.AddHours(-10)
- Console.WriteLine("subtracting 10 hours")
- Console.WriteLine(_Date.ToString("dd/MM/yyyy HH/mm/ss"))
- _Date = _Date.AddMinutes(-10)
- Console.WriteLine("subtracting 10 minutes")
- Console.WriteLine(_Date.ToString("dd/MM/yyyy HH/mm/ss"))
- _Date = _Date.AddSeconds(-10)
- Console.WriteLine("subtracting 10 seconds")
- Console.WriteLine(_Date.ToString("dd/MM/yyyy HH/mm/ss"))
- _Date = _Date.Add(New TimeSpan(10, 10, 0, 10, 0).Negate)
- Console.WriteLine("subtracting 10 days, 10 hours and 10 seconds with timespan")
- Console.WriteLine(_Date.ToString("dd/MM/yyyy HH/mm/ss"))
- Console.ReadLine()
- End Sub
- End Module
See how all numbers are negative. And also how you can make a negative timespan just be adding .Negate.
This is the result of the above.
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