TimeSpan.FromHours(Double) Metoda

Definicja

Zwraca wartość TimeSpan , która reprezentuje określoną liczbę godzin, gdzie specyfikacja jest dokładna dla najbliższej milisekundy.

public:
 static TimeSpan FromHours(double value);
public static TimeSpan FromHours (double value);
static member FromHours : double -> TimeSpan
Public Shared Function FromHours (value As Double) As TimeSpan

Parametry

value
Double

Liczba godzin dokładnych dla najbliższej milisekundy.

Zwraca

Obiekt reprezentujący valueobiekt .

Wyjątki

value wartość jest mniejsza niż TimeSpan.MinValue lub większa niż TimeSpan.MaxValue.

-lub-

value to PositiveInfinity.

-lub-

value to NegativeInfinity.

value jest równe NaN.

Przykłady

Poniższy przykład tworzy kilka TimeSpan obiektów przy użyciu FromHours metody .

// Example of the TimeSpan::FromHours( double ) method.
using namespace System;
void GenTimeSpanFromHours( double hours )
{
   
   // Create a TimeSpan object and TimeSpan string from 
   // a number of hours.
   TimeSpan interval = TimeSpan::FromHours( hours );
   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 = String::Concat( timeInterval, "        " );

   Console::WriteLine( "{0,21}{1,26}", hours, timeInterval );
}

int main()
{
   Console::WriteLine( "This example of TimeSpan::FromHours( double )\n"
   "generates the following output.\n" );
   Console::WriteLine( "{0,21}{1,18}", "FromHours", "TimeSpan" );
   Console::WriteLine( "{0,21}{1,18}", "---------", "--------" );
   GenTimeSpanFromHours( 0.0000002 );
   GenTimeSpanFromHours( 0.0000003 );
   GenTimeSpanFromHours( 0.0012345 );
   GenTimeSpanFromHours( 12.3456789 );
   GenTimeSpanFromHours( 123456.7898765 );
   GenTimeSpanFromHours( 0.0002777 );
   GenTimeSpanFromHours( 0.0166666 );
   GenTimeSpanFromHours( 1 );
   GenTimeSpanFromHours( 24 );
   GenTimeSpanFromHours( 500.3389445 );
}

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

            FromHours          TimeSpan
            ---------          --------
                2E-07          00:00:00.0010000
                3E-07          00:00:00.0010000
            0.0012345          00:00:04.4440000
           12.3456789          12:20:44.4440000
       123456.7898765     5144.00:47:23.5550000
            0.0002777          00:00:01
            0.0166666          00:01:00
                    1          01:00:00
                   24        1.00:00:00
          500.3389445       20.20:20:20.2000000
*/
// Example of the TimeSpan.FromHours( double ) method.
using System;

class FromHoursDemo
{
    static void GenTimeSpanFromHours( double hours )
    {
        // Create a TimeSpan object and TimeSpan string from 
        // a number of hours.
        TimeSpan    interval = TimeSpan.FromHours( hours );
        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}", hours, timeInterval );
    } 

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

        GenTimeSpanFromHours( 0.0000002 );
        GenTimeSpanFromHours( 0.0000003 );
        GenTimeSpanFromHours( 0.0012345 );
        GenTimeSpanFromHours( 12.3456789 );
        GenTimeSpanFromHours( 123456.7898765 );
        GenTimeSpanFromHours( 0.0002777 );
        GenTimeSpanFromHours( 0.0166666 );
        GenTimeSpanFromHours( 1 );
        GenTimeSpanFromHours( 24 );
        GenTimeSpanFromHours( 500.3389445 );
    } 
} 

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

            FromHours          TimeSpan
            ---------          --------
                2E-07          00:00:00.0010000
                3E-07          00:00:00.0010000
            0.0012345          00:00:04.4440000
           12.3456789          12:20:44.4440000
       123456.7898765     5144.00:47:23.5550000
            0.0002777          00:00:01
            0.0166666          00:01:00
                    1          01:00:00
                   24        1.00:00:00
          500.3389445       20.20:20:20.2000000
*/
// Example of the TimeSpan.FromHours( double ) method.
open System

let genTimeSpanFromHours hours =
    // Create a TimeSpan object and TimeSpan string from 
    // a number of hours.
    let interval = TimeSpan.FromHours hours
    let timeInterval = string interval

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

    printfn $"{hours,21}{timeInterval,26}"

printfn "This example of TimeSpan.FromHours( double )\ngenerates the following output.\n"
printfn "%21s%18s" "FromHours" "TimeSpan"
printfn "%21s%18s" "---------" "--------"

genTimeSpanFromHours 0.0000002
genTimeSpanFromHours 0.0000003
genTimeSpanFromHours 0.0012345
genTimeSpanFromHours 12.3456789
genTimeSpanFromHours 123456.7898765
genTimeSpanFromHours 0.0002777
genTimeSpanFromHours 0.0166666
genTimeSpanFromHours 1
genTimeSpanFromHours 24
genTimeSpanFromHours 500.3389445

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

            FromHours          TimeSpan
            ---------          --------
                2E-07          00:00:00.0010000
                3E-07          00:00:00.0010000
            0.0012345          00:00:04.4440000
           12.3456789          12:20:44.4440000
       123456.7898765     5144.00:47:23.5550000
            0.0002777          00:00:01
            0.0166666          00:01:00
                    1          01:00:00
                   24        1.00:00:00
          500.3389445       20.20:20:20.2000000
*)
' Example of the TimeSpan.FromHours( Double ) method.
Module FromHoursDemo

    Sub GenTimeSpanFromHours( hours As Double )

        ' Create a TimeSpan object and TimeSpan string from 
        ' a number of hours.
        Dim interval As TimeSpan = _
            TimeSpan.FromHours( hours )
        Dim timeInterval As String = interval.ToString( )

        ' Pad the end of the TimeSpan string with spaces if it 
        ' does not contain milliseconds.
        Dim pIndex As Integer = timeInterval.IndexOf( ":"c )
        pIndex = timeInterval.IndexOf( "."c, pIndex )
        If pIndex < 0 Then  timeInterval &= "        "

        Console.WriteLine( "{0,21}{1,26}", hours, timeInterval )
    End Sub 

    Sub Main( )

        Console.WriteLine( "This example of " & _
            "TimeSpan.FromHours( Double )" & _
            vbCrLf & "generates the following output." & vbCrLf )
        Console.WriteLine( "{0,21}{1,18}", _
            "FromHours", "TimeSpan" )    
        Console.WriteLine( "{0,21}{1,18}", _
            "---------", "--------" )    

        GenTimeSpanFromHours( 0.0000002 )
        GenTimeSpanFromHours( 0.0000003 )
        GenTimeSpanFromHours( 0.0012345 )
        GenTimeSpanFromHours( 12.3456789 )
        GenTimeSpanFromHours( 123456.7898765 )
        GenTimeSpanFromHours( 0.0002777 )
        GenTimeSpanFromHours( 0.0166666 )
        GenTimeSpanFromHours( 1 )
        GenTimeSpanFromHours( 24 )
        GenTimeSpanFromHours( 500.3389445 )
    End Sub 
End Module 

' This example of TimeSpan.FromHours( Double )
' generates the following output.
' 
'             FromHours          TimeSpan
'             ---------          --------
'                 2E-07          00:00:00.0010000
'                 3E-07          00:00:00.0010000
'             0.0012345          00:00:04.4440000
'            12.3456789          12:20:44.4440000
'        123456.7898765     5144.00:47:23.5550000
'             0.0002777          00:00:01
'             0.0166666          00:01:00
'                     1          01:00:00
'                    24        1.00:00:00
'           500.3389445       20.20:20:20.2000000

Uwagi

Parametr value jest konwertowany na milisekundy, który jest konwertowany na znaczniki, a ta liczba znaczników służy do inicjowania nowego TimeSpanelementu . value W związku z tym będzie uważana za dokładną tylko dla najbliższej milisekundy. Należy pamiętać, że ze względu na utratę dokładności Double typu danych ta konwersja może wygenerować OverflowException wartość dla wartości zbliżonych do , ale nadal w zakresie MinValue wartości lub MaxValue. Na przykład powoduje OverflowException to wykonanie następującej próby utworzenia TimeSpan wystąpienia obiektu.

// The following throws an OverflowException at runtime
TimeSpan maxSpan = TimeSpan.FromHours(TimeSpan.MaxValue.TotalHours);
// The following throws an OverflowException at runtime
let maxSpan = TimeSpan.FromHours TimeSpan.MaxValue.TotalHours
' The following throws an OverflowException at runtime
Dim maxSpan As TimeSpan = TimeSpan.FromHours(TimeSpan.MaxValue.TotalHours)

Dotyczy

Zobacz też