FileInfo.Delete メソッド

ファイルを完全に削除します。

Overrides Public Sub Delete()
[C#]
public override void Delete();
[C++]
public: void Delete();
[JScript]
public override function Delete();

例外

解説

ファイルが存在しない場合は、このメソッドは何も実行しません。

このメソッドの使用例については、以下の「使用例」を参照してください。その他の一般的な I/O タスクまたは関連する I/O タスクの例を次の表に示します。

Windows NT 4.0 プラットフォームに関する注意点: Delete は、通常の入出力用に開かれているファイルや、メモリが割り当てられているファイルは削除しません。

使用例

Delete メソッドの例を次に示します。

 
Imports System
Imports System.IO
Imports System.Text

Public Class Test

    Public Shared Sub Main()
        Dim path As String = "c:\temp\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

[C#] 
using System;
using System.IO;

class Test 
{
    
    public static void Main() 
    {
        string path = @"c:\temp\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());
        }
    }
}

[C++] 
#using <mscorlib.dll>

using namespace System;
using namespace System::IO;

int main() {
    String* path = S"c:\\temp\\MyTest.txt";
    FileInfo* fi1 = new FileInfo(path);

    try {
        StreamWriter* sw = fi1->CreateText();
        if (sw) __try_cast<IDisposable*>(sw)->Dispose();

        String* path2 = String::Concat(path, S"temp");
        FileInfo* fi2 = new FileInfo(path2);

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

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

        //Delete the newly created file.
        fi2->Delete();
        Console::WriteLine(S"{0} was successfully deleted.", path2);
    } catch (Exception* e) {
        Console::WriteLine(S"The process failed: {0}", e);
    }
}

ファイルを作成し、閉じてから削除する例を次に示します。

 
Imports System
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 'Main
End Class 'DeleteTest

[C#] 
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();
    }
}

[C++] 
#using <mscorlib.dll>

using namespace System;
using namespace System::IO;

int main() {
    // Create a reference to a file.
    FileInfo* fi = new FileInfo(S"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();
}

[JScript] 
import System;
import System.IO;

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

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET

.NET Framework セキュリティ:

• FileIOPermission (ファイルの読み書き用) FileIOPermissionAccess.Write (関連する列挙体)

参照

FileInfo クラス | FileInfo メンバ | System.IO 名前空間 | 入出力操作 | ファイルからのテキストの読み取り | ファイルへのテキストの書き込み