語言

FileInfo.Delete 方法

定義

命名空間:
System.IO
組件:
mscorlib.dll, System.IO.FileSystem.dll
組件:
netstandard.dll, System.Runtime.dll
組件:
netstandard.dll, System.IO.FileSystem.dll
組件:
netstandard.dll, System.IO.FileSystem.dll, System.Runtime.dll
組件:
System.IO.FileSystem.dll
組件:
mscorlib.dll
組件:
netstandard.dll
來源:
FileInfo.cs
來源:
FileInfo.cs
來源:
FileInfo.cs
來源:
FileInfo.cs
來源:
FileInfo.cs

永久刪除檔案。

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

例外狀況

IOException

目標檔案是在運行 NT 的電腦上開啟或Microsoft Windows記憶體映射。

-或-

檔案上有一個開放的 handle，作業系統為 Windows XP 或更早版本。 這種開放帳號可能是因為列舉目錄和檔案而產生的。 欲了解更多資訊，請參閱 「如何列舉目錄與檔案」。

SecurityException

來電者沒有所需的權限。

UnauthorizedAccessException

路徑是一個目錄。

範例

以下範例示範此 Delete 方法。

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.

以下範例說明建立、關閉及刪除檔案。

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

備註

如果檔案不存在，這個方法就不會有任何動作。

適用於

另請參閱