FileInfo.Delete 方法

定义

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

永久删除文件。

public:
 override void Delete();
public override void Delete();
override this.Delete : unit -> unit
Public Overrides Sub Delete ()

例外

IOException

目标文件在运行 Microsoft Windows NT 的计算机上打开或映射内存。

-或-

文件上有一个打开的句柄，操作系统Windows XP或更早版本。 此打开的句柄可能是枚举目录和文件导致的。 有关详细信息，请参阅 “如何：枚举目录和文件”。

SecurityException

调用方没有所需的权限。

UnauthorizedAccessException

路径是目录。

示例

以下示例演示了该方法 Delete 。

using System;
using System.IO;

class Test
{
    
    public static void Main()
    {
        string path = @"c:\MyTest.txt";
        FileInfo fi1 = new FileInfo(path);

        try
        {
            using (StreamWriter sw = fi1.CreateText()) {}
            string path2 = path + "temp";
            FileInfo fi2 = new FileInfo(path2);

            //Ensure that the target does not exist.
            fi2.Delete();

            //Copy the file.
            fi1.CopyTo(path2);
            Console.WriteLine("{0} was copied to {1}.", path, path2);

            //Delete the newly created file.
            fi2.Delete();
            Console.WriteLine("{0} was successfully deleted.", path2);
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//c:\MyTest.txt was copied to c:\MyTest.txttemp.
//c:\MyTest.txttemp was successfully deleted.

Imports System.IO
Imports System.Text

Public Class Test

    Public Shared Sub Main()
        Dim path As String = "c:\MyTest.txt"
        Dim fi As FileInfo = New FileInfo(path)

        Try
            Dim sw As StreamWriter = fi.CreateText()
            sw.Close()
            Dim path2 As String = path + "temp"
            Dim fi2 As FileInfo = New FileInfo(path2)

            'Ensure that the target does not exist.
            fi2.Delete()

            'Copy the file.
            fi.CopyTo(path2)
            Console.WriteLine("{0} was copied to {1}.", path, path2)

            'Delete the newly created file.
            fi2.Delete()
            Console.WriteLine("{0} was successfully deleted.", path2)

        Catch e As Exception
            Console.WriteLine("The process failed: {0}", e.ToString())
        End Try
    End Sub
End Class
'This code produces output similar to the following; 
'results may vary based on the computer/file structure/etc.:
'
'c:\MyTest.txt was copied to c:\MyTest.txttemp.
'c:\MyTest.txttemp was successfully deleted.

以下示例创建、关闭和删除文件。

using System;
using System.IO;

public class DeleteTest
{
    public static void Main()
    {
        // Create a reference to a file.
        FileInfo fi = new FileInfo("temp.txt");
        // Actually create the file.
        FileStream fs = fi.Create();
        // Modify the file as required, and then close the file.
        fs.Close();
        // Delete the file.
        fi.Delete();
    }
}

Imports System.IO

Public Class DeleteTest
    Public Shared Sub Main()
        ' Create a reference to a file.
        Dim fi As New FileInfo("temp.txt")
        ' Actually create the file.
        Dim fs As FileStream = fi.Create()
        ' Modify the file as required, and then close the file.
        fs.Close()
        ' Delete the file.
        fi.Delete()
    End Sub
End Class

注解

如果文件不存在，此方法不执行任何操作。

适用于

另请参阅