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TimeSpan.FromDays Method

Returns a TimeSpan that represents a specified number of days, where the specification is accurate to the nearest millisecond.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static TimeSpan FromDays(
	double value
)

Parameters

value
Type: System.Double
A number of days, accurate to the nearest millisecond.

Return Value

Type: System.TimeSpan
An object that represents value.

ExceptionCondition
OverflowException

value is less than MinValue or greater than MaxValue.

-or-

value is Double.PositiveInfinity.

-or-

value is Double.NegativeInfinity.

ArgumentException

value is equal to Double.NaN.

The value parameter is converted to milliseconds, which is converted to ticks, and that number of ticks is used to initialize the new TimeSpan. Therefore, value will only be considered accurate to the nearest millisecond. Note that, because of the loss of precision of the Double data type, this conversion can cause an OverflowException for values that are near to but still in the range of either MinValue or MaxValue. For example, this causes an OverflowException in the following attempt to instantiate a TimeSpan object.


// The following throws an OverflowException at runtime
TimeSpan maxSpan = TimeSpan.FromDays(TimeSpan.MaxValue.TotalDays);


The following example creates several TimeSpan objects using the FromDays method.


// Example of the TimeSpan.FromDays( double ) method.
using System;

class FromDaysDemo
{
    static void GenTimeSpanFromDays( double days )
    {
        // Create a TimeSpan object and TimeSpan string from 
        // a number of days.
        TimeSpan interval = TimeSpan.FromDays( days );
        string   timeInterval = interval.ToString( );

        // Pad the end of the TimeSpan string with spaces if it 
        // does not contain milliseconds.
        int pIndex = timeInterval.IndexOf( ':' );
        pIndex = timeInterval.IndexOf( '.', pIndex );
        if( pIndex < 0 )   timeInterval += "        ";

        Console.WriteLine( "{0,21}{1,26}", days, timeInterval );
    } 

    static void Main( )
    {
        Console.WriteLine(
            "This example of TimeSpan.FromDays( double )\n" +
            "generates the following output.\n" );
        Console.WriteLine( "{0,21}{1,18}",
            "FromDays", "TimeSpan" );
        Console.WriteLine( "{0,21}{1,18}", 
            "--------", "--------" );

        GenTimeSpanFromDays( 0.000000006 );
        GenTimeSpanFromDays( 0.000000017 );
        GenTimeSpanFromDays( 0.000123456 );
        GenTimeSpanFromDays( 1.234567898 );
        GenTimeSpanFromDays( 12345.678987654 );
        GenTimeSpanFromDays( 0.000011574 );
        GenTimeSpanFromDays( 0.000694444 );
        GenTimeSpanFromDays( 0.041666666 );
        GenTimeSpanFromDays( 1 );
        GenTimeSpanFromDays( 20.84745602 );
    } 
} 

/*
This example of TimeSpan.FromDays( double )
generates the following output.

             FromDays          TimeSpan
             --------          --------
                6E-09          00:00:00.0010000
              1.7E-08          00:00:00.0010000
          0.000123456          00:00:10.6670000
          1.234567898        1.05:37:46.6660000
      12345.678987654    12345.16:17:44.5330000
           1.1574E-05          00:00:01
          0.000694444          00:01:00
          0.041666666          01:00:00
                    1        1.00:00:00
          20.84745602       20.20:20:20.2000000
*/ 


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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