C Sharp/DateTime/ToOADate

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Contents

[edit] Using the DateTime.ToOADate Method

ToOADate (OLE Automation Date) returns a double value which represents the amont of days from 12:00 AM, 30 December 1899. It will process negative double values and so 12:00 AM, 30 December 1899 is not the minimum value it is the middle. Now lets look at some real code.


  • Note: ToOADate returns a double the whole part represents the day and the decimal part represents the time.


[edit] Syntax

double variable = object.ToOADate();

[edit] Example 1:

using System;
class Program
{
    static void Main()
    {
        DateTime MyDate = new DateTime(1904, 12, 12, 1,4,1);
        double MyDouble = MyDate.ToOADate();
        Console.WriteLine(MyDouble);
        Console.Read();
    }
}

Output:

1808.04445601852


[edit] Example 2:

Now that you have converted a date to a ToOADate you must know how to convert it back to a regular datetime format. Here is how.

using System;
class Program
{
    static void Main()
    {
        double MyOADate = 831.01289631332;
        DateTime MyDate = DateTime.FromOADate(MyOADate);
        Console.WriteLine(MyDate.ToString());
        Console.Read();
    }
}

Output:

4/10/1902 12:18:34 AM


<-- DateTime Tutorial