FileInfo.Create Metodo

Riferimento

Definizione

Spazio dei nomi:: System.IO

Assembly:: mscorlib.dll, System.IO.FileSystem.dll

Assembly:: System.IO.FileSystem.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Origine:: FileInfo.cs

Origine:: FileInfo.cs

Origine:: FileInfo.cs

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Crea un file.

public:
 System::IO::FileStream ^ Create();

public System.IO.FileStream Create ();

member this.Create : unit -> System.IO.FileStream

Public Function Create () As FileStream

Restituisce

FileStream

Nuovo file.

Esempio

Nell'esempio seguente viene creato un riferimento a un file e quindi viene creato il file su disco usando FileInfo.Create().

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

Nell'esempio seguente viene creato un file, viene aggiunto del testo e viene letto dal file.

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main()
{
   String^ path = "c:\\MyTest.txt";
   FileInfo^ fi = gcnew FileInfo( path );
   
   // Delete the file if it exists.
   if ( fi->Exists )
   {
      fi->Delete();
   }
   
   //Create the file.
   FileStream^ fs = fi->Create();
   try
   {
      array<Byte>^info = (gcnew UTF8Encoding( true ))->GetBytes( "This is some text in the file." );
      
      //Add some information to the file.
      fs->Write( info, 0, info->Length );
   }
   finally
   {
      if ( fs )
         delete (IDisposable^)fs;
   }

   //Open the stream and read it back.
   StreamReader^ sr = fi->OpenText();
   try
   {
      String^ s = "";
      while ( s = sr->ReadLine() )
      {
         Console::WriteLine( s );
      }
   }
   finally
   {
      if ( sr )
         delete (IDisposable^)sr;
   }
}

//This code produces output similar to the following; 
//results may vary based on the computer/file structure/etc.:
//
//This is some text in the file.

using System;
using System.IO;
using System.Text;

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

        // Delete the file if it exists.
        if (fi.Exists)
        {
            fi.Delete();
        }

        //Create the file.
        using (FileStream fs = fi.Create())
        {
            Byte[] info =
                new UTF8Encoding(true).GetBytes("This is some text in the file.");

            //Add some information to the file.
            fs.Write(info, 0, info.Length);
        }

        //Open the stream and read it back.
        using (StreamReader sr = fi.OpenText())
        {
            string s = "";
            while ((s = sr.ReadLine()) != null)
            {
                Console.WriteLine(s);
            }
        }
    }
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//This is some text in the file.

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)

        ' Delete the file if it exists.
        If fi.Exists() Then
            fi.Delete()
        End If

        'Create the file.
        Dim fs As FileStream = fi.Create()
        Dim info As Byte() = New UTF8Encoding(True).GetBytes("This is some text in the file.")

        'Add some information to the file.
        fs.Write(info, 0, info.Length)
        fs.Close()

        'Open the stream and read it back.
        Dim sr As StreamReader = fi.OpenText()

        Do While sr.Peek() >= 0
            Console.WriteLine(sr.ReadLine())
        Loop
        sr.Close()
    End Sub
End Class

'This code produces output similar to the following; 
'results may vary based on the computer/file structure/etc.:
'
'This is some text in the file.

Commenti

Per impostazione predefinita, l'accesso in lettura/scrittura completo ai nuovi file viene concesso a tutti gli utenti.

Questo metodo è un wrapper per la funzionalità fornita da File.Create.

Si applica a

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