Directory.GetCreationTime(String) 方法

  • 参考

定义

命名空间:
System.IO
程序集:
mscorlib.dll, System.IO.FileSystem.dll
程序集:
System.IO.FileSystem.dll
程序集:
System.Runtime.dll
程序集:
mscorlib.dll
程序集:
netstandard.dll
Source:
Directory.cs
Source:
Directory.cs
Source:
Directory.cs

获取目录的创建日期和时间。

public:
 static DateTime GetCreationTime(System::String ^ path);
public static DateTime GetCreationTime (string path);
static member GetCreationTime : string -> DateTime
Public Shared Function GetCreationTime (path As String) As DateTime

参数

path
String

目录的路径。

返回

DateTime

一个设置为指定目录的创建日期和时间的结构。 该值用本地时间表示。

例外

UnauthorizedAccessException

调用方没有所要求的权限。

ArgumentException

.NET Framework 和 .NET Core 版本早于 2.1： path 是零长度字符串，仅包含空格，或包含一个或多个无效字符。 你可以使用 GetInvalidPathChars() 方法查询无效字符。

ArgumentNullException

path 为 null。

PathTooLongException

指定的路径和/或文件名超过了系统定义的最大长度。

示例

以下示例获取指定目录的创建时间。

using namespace System;
using namespace System::IO;
int main()
{
   try
   {
      
      // Get the creation time of a well-known directory.
      DateTime dt = Directory::GetCreationTime( Environment::CurrentDirectory );
      
      // Give feedback to the user.
      if ( DateTime::Now.Subtract( dt ).TotalDays > 364 )
      {
         Console::WriteLine( "This directory is over a year old." );
      }
      else
      if ( DateTime::Now.Subtract( dt ).TotalDays > 30 )
      {
         Console::WriteLine( "This directory is over a month old." );
      }
      else
      if ( DateTime::Now.Subtract( dt ).TotalDays <= 1 )
      {
         Console::WriteLine( "This directory is less than a day old." );
      }
      else
      {
         Console::WriteLine( "This directory was created on {0}", dt );
      }
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "The process failed: {0}", e );
   }

}

using System;
using System.IO;

class Test
{
    public static void Main()
    {
        try
        {
            // Get the creation time of a well-known directory.
            DateTime dt = Directory.GetCreationTime(Environment.CurrentDirectory);

            // Give feedback to the user.
            if (DateTime.Now.Subtract(dt).TotalDays > 364)
            {
                Console.WriteLine("This directory is over a year old.");
            }
            else if (DateTime.Now.Subtract(dt).TotalDays > 30)
            {
                Console.WriteLine("This directory is over a month old.");
            }
            else if (DateTime.Now.Subtract(dt).TotalDays <= 1)
            {
                Console.WriteLine("This directory is less than a day old.");
            }
            else
            {
                Console.WriteLine("This directory was created on {0}", dt);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

open System
open System.IO

try
    // Get the creation time of a well-known directory.
    let dt = Directory.GetCreationTime Environment.CurrentDirectory

    // Give feedback to the user.
    if DateTime.Now.Subtract(dt).TotalDays > 364 then
        printfn "This directory is over a year old."
    elif DateTime.Now.Subtract(dt).TotalDays > 30 then
        printfn "This directory is over a month old."
    elif DateTime.Now.Subtract(dt).TotalDays <= 1 then
        printfn "This directory is less than a day old."
    else
        printfn $"This directory was created on {dt}"
with e ->
    printfn $"The process failed: {e}"

Imports System.IO

Public Class Test
    Public Shared Sub Main()
        Try
            ' Get the creation time of a well-known directory.
            Dim dt As DateTime = Directory.GetCreationTime(Environment.CurrentDirectory)

            ' Give feedback to the user.
            If DateTime.Now.Subtract(dt).TotalDays > 364 Then
                Console.WriteLine("This directory is over a year old.")
            ElseIf DateTime.Now.Subtract(dt).TotalDays > 30 Then
                Console.WriteLine("This directory is over a month old.")
            ElseIf DateTime.Now.Subtract(dt).TotalDays <= 1 Then
                Console.WriteLine("This directory is less than a day old.")
            Else
                Console.WriteLine("This directory was created on {0}", dt)
            End If

        Catch e As Exception
            Console.WriteLine("The process failed: {0}", e.ToString())
        End Try
    End Sub
End Class

注解

注意

此方法可能返回不准确的值，因为它使用本机函数，其值可能不会由操作系统持续更新。

此方法等效于 File.GetCreationTime。

如果 参数中描述的 path 目录不存在，则此方法返回 1601 年 1 月 1 日午夜 12：00， (C.E.) 协调世界时 (UTC) ，调整为本地时间。

允许 path 参数指定相对路径信息或绝对路径信息。 相对路径信息被解释为相对于当前工作目录。 若要获取当前工作目录，请参阅 GetCurrentDirectory。

参数的 path 区分大小写对应于运行代码的文件系统的区分大小写。 例如，它在 NTFS 上不区分大小写， (默认 Windows 文件系统) ，在 Linux 文件系统上区分大小写。

有关常见 I/O 任务的列表，请参阅 常见 I/O 任务。

适用于

另请参阅