DirectoryInfo(String) 构造函数

定义

命名空间:

System.IO

程序集:

System.Runtime.dll

Source:

DirectoryInfo.cs

初始化指定路径上的 DirectoryInfo 类的新实例。

public:
 DirectoryInfo(System::String ^ path);

public DirectoryInfo (string path);

new System.IO.DirectoryInfo : string -> System.IO.DirectoryInfo

Public Sub New (path As String)

参数

path

String

一个字符串，它指定要在其中创建 DirectoryInfo 的路径。

例外

ArgumentNullException

path 为 null。

SecurityException

调用方没有所要求的权限。

ArgumentException

.NET Framework 和 .NET Core 版本早于 2.1：path包含无效字符，如“、<、 >或 |。

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

以下示例使用此构造函数创建指定的目录和子目录，并演示无法删除包含子目录的目录。

using namespace System;
using namespace System::IO;
int main()
{
   
   // Specify the directories you want to manipulate.
   DirectoryInfo^ di1 = gcnew DirectoryInfo( "c:\\MyDir" );
   DirectoryInfo^ di2 = gcnew DirectoryInfo( "c:\\MyDir\\temp" );
   try
   {
      
      // Create the directories.
      di1->Create();
      di2->Create();
      
      // This operation will not be allowed because there are subdirectories.
      Console::WriteLine( "I am about to attempt to delete {0}.", di1->Name );
      di1->Delete();
      Console::WriteLine( "The Delete operation was successful, which was unexpected." );
   }
   catch ( Exception^ ) 
   {
      Console::WriteLine( "The Delete operation failed as expected." );
   }

}

using System;
using System.IO;

class Test
{
    public static void Main()
    {
        // Specify the directories you want to manipulate.
        DirectoryInfo di1 = new DirectoryInfo(@"c:\MyDir");
        DirectoryInfo di2 = new DirectoryInfo(@"c:\MyDir\temp");

        try
        {
            // Create the directories.
            di1.Create();
            di2.Create();

            // This operation will not be allowed because there are subdirectories.
            Console.WriteLine("I am about to attempt to delete {0}.", di1.Name);
            di1.Delete();
            Console.WriteLine("The Delete operation was successful, which was unexpected.");
        }
        catch (Exception)
        {
            Console.WriteLine("The Delete operation failed as expected.");
        }
        finally {}
    }
}

open System.IO

// Specify the directories you want to manipulate.
let di1 = DirectoryInfo @"c:\MyDir"
let di2 = DirectoryInfo @"c:\MyDir\temp"

try
    // Create the directories.
    di1.Create()
    di2.Create()

    // This operation will not be allowed because there are subdirectories.
    printfn $"I am about to attempt to delete {di1.Name}."
    di1.Delete()
    printfn "The Delete operation was successful, which was unexpected."
with _ ->
    printfn "The Delete operation failed as expected."

Imports System.IO

Public Class Test
    Public Shared Sub Main()
        ' Specify the directories you want to manipulate.
        Dim di1 As DirectoryInfo = New DirectoryInfo("c:\MyDir")
        Dim di2 As DirectoryInfo = New DirectoryInfo("c:\MyDir\temp")
        Try
            ' Create the directories.
            di1.Create()
            di2.Create()
            ' This operation will not be allowed because there are subdirectories.
            Console.WriteLine("I am about to attempt to delete {0}.", di1.Name)
            di1.Delete()
            Console.WriteLine("The Delete operation was successful, which was unexpected.")
        Catch e As Exception
            Console.WriteLine("The Delete operation failed as expected.")
        End Try
    End Sub
End Class

注解

此构造函数不检查目录是否存在。 此构造函数是用于在后续操作中访问磁盘的字符串的占位符。

参数 path 可以是文件名，包括通用命名约定 (UNC) 共享上的文件。

注意

编译具有特定区域性设置的一组字符并检索具有不同区域性设置的相同字符时，这些字符可能无法解释，并可能导致引发异常。

有关常见 I/O 任务的列表，请参阅 常见 I/O 任务。

另请参阅

• DriveInfo
• 文件和流 I/O
• 如何：从文件中读取文本
• 如何：将文本写入文件