FileInfo.Delete Método

Definição

Namespace:

System.IO

Assembly:

System.Runtime.dll

Origem:

FileInfo.cs

Exclui permanentemente um arquivo.

public:
 override void Delete();

public override void Delete ();

override this.Delete : unit -> unit

Public Overrides Sub Delete ()

Exceções

IOException

O arquivo de destino está aberto ou mapeado em memória em um computador que executa o Microsoft Windows NT.

- ou -

Há um identificador aberto no arquivo, e o sistema operacional é o Windows XP ou uma versão anterior. Esse identificador aberto pode resultar da enumeração de diretórios e arquivos. Para obter mais informações, consulte How to: Enumerate Directories and Files (Como enumerar diretórios e arquivos).

SecurityException

O chamador não tem a permissão necessária.

UnauthorizedAccessException

O caminho é um diretório.

Exemplos

O exemplo a seguir demonstra o Delete método.

using namespace System;
using namespace System::IO;

int main()
{
   String^ path = "c:\\MyTest.txt";
   FileInfo^ fi1 = gcnew FileInfo( path );
   try
   {
      StreamWriter^ sw = fi1->CreateText();
      if ( sw )
         delete (IDisposable^)sw;

      String^ path2 = String::Concat( path, "temp" );
      FileInfo^ fi2 = gcnew 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 );
   }
}
//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.

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.

O exemplo a seguir cria, fecha e exclui um arquivo.

using namespace System;
using namespace System::IO;
int main()
{
   
   // Create a reference to a file.
   FileInfo^ fi = gcnew 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();
}

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

Comentários

Se o arquivo não existir, esse método não fará nada.

Confira também

• E/S de arquivo e de fluxo
• Como ler texto de um arquivo
• Como gravar texto em um arquivo