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📜  C＃DirectoryInfo

📅  最后修改于: 2020-10-31 04:19:32             🧑  作者: Mango

C＃DirectoryInfo类

DirectoryInfo类是System.IO名称空间的一部分。它用于创建，删除和移动目录。它提供了执行与目录和子目录相关的操作的方法。它是一个密封的类，因此我们不能继承它。

DirectoryInfo类提供了下面列出的构造函数，方法和属性。

C＃DirectoryInfo语法

[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class DirectoryInfo : FileSystemInfo

C＃DirectoryInfo构造函数

下表包含DirectoryInfo类的构造函数。

Constructor Description
DirectoryInfo(String) It is used to initialize a new instance of the DirectoryInfo class on the specified path.

C＃DirectoryInfo属性

下表包含DirectoryInfo类的属性。

Property Description
Attributes It is used to get or set the attributes for the current file or directory.
CreationTime It is used to get or set the creation time of the current file or directory.
CreationTimeUtc It is used to get or set creation time, in coordinated universal time (UTC).
Exists It is used to get a value indicating whether the directory exists.
Extension It is used to get the string representing the extension part of the file.
FullName It is used to get the full path of the directory.
LastAccessTime It is used to get or set the time the current file or directory was last accessed.
LastAccessTimeUtc It is used to get or set the time, in coordinated universal time (UTC) that the current file or directory was last accessed.
LastWriteTime It is used to get or set the time when the current file or directory was last written.
LastWriteTimeUtc It is used to get or set the time, in coordinated universal time (UTC), when the current file or directory was last written.
Name It is used to get the name of this DirectoryInfo instance.
Parent It is used to get the parent directory of a specified subdirectory.
Root It is used to get the root portion of the directory.

C＃DirectoryInfo方法

下表包含DirectoryInfo类的方法。

Method Description
Create() It is used to create a directory.
Create(DirectorySecurity) It is used to create a directory using a DirectorySecurity object.
CreateObjRef(Type) It is used to create an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.
CreateSubdirectory(String) It is used to create a subdirectory or subdirectories on the specified path.
CreateSubdirectory(String,DirectorySecurity) It is used to create a subdirectory or subdirectories on the specified path with the specified security.
Delete() It is used to delete this DirectoryInfo if it is empty.
Delete(Boolean) It is used to delete this instance of a DirectoryInfo, specifying whether to delete subdirectories and files.
EnumerateDirectories() It returns an enumerable collection of directory information in the current directory.
EnumerateFiles() It returns an enumerable collection of file information in the current directory.
GetAccessControl() It is used to get a DirectorySecurity object that encapsulates the access control list (ACL) entries for the directory.
GetDirectories() It returns the subdirectories of the current directory.
GetFiles() It returns a file list from the current directory.
GetType() It is used to get the Type of the current instance.
MoveTo(String) It is used to move a DirectoryInfo instance and its contents to a new path.
Refresh() It is used to refresh the state of the object.
SetAccessControl(DirectorySecurity) It is used to set access control list (ACL) entries described by a DirectorySecurity object.
ToString() It returns the original path that was passed by the user.

C＃DirectoryInfo示例

在以下示例中，我们通过指定目录路径来创建javatpoint目录。

using System;
using System.IO;
namespace CSharpProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            // Provide directory name with complete location.
            DirectoryInfo directory = new DirectoryInfo(@"F:\javatpoint");
            try
            {
                // Check, directory exist or not.
                if (directory.Exists)
                {
                    Console.WriteLine("Directory already exist.");
                    return;
                }
                // Creating a new directory.
                directory.Create();
                Console.WriteLine("The directory is created successfully.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Directory not created: {0}", e.ToString());
            }
        }
    }
}

输出：

The directory is created successfully.

在下面的屏幕截图中，我们可以看到目录已创建。

DirectoryInfo类还提供了一个delete方法来删除创建的目录。在以下程序中，我们将删除在上一个程序中创建的目录。

C＃DirectoryInfo示例：删除目录

using System;
using System.IO;
namespace CSharpProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            // Providing directory name with complete location.
            DirectoryInfo directory = new DirectoryInfo(@"F:\javatpoint");
            try
            {
                // Deleting directory
                directory.Delete();
                Console.WriteLine("The directory is deleted successfully.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Something went wrong: {0}", e.ToString());
            }
        }
    }
}

输出：

The directory is deleted successfully.

如果指定的目录不存在，则抛出System.IO.DirectoryNotFoundException异常。