OpenFileDialog.ShowReadOnly Özellik

Tanım

Ad Alanı:

System.Windows.Forms

Bütünleştirilmiş Kod:

System.Windows.Forms.dll

İletişim kutusunun salt okunur onay kutusu içerip içermediğini belirten bir değer alır veya ayarlar.

public:
 property bool ShowReadOnly { bool get(); void set(bool value); };

public bool ShowReadOnly { get; set; }

member this.ShowReadOnly : bool with get, set

Public Property ShowReadOnly As Boolean

Özellik Değeri

Boolean

true iletişim kutusunda salt okunur onay kutusu varsa; aksi takdirde , false. false varsayılan değerdir.

Örnekler

Aşağıdaki kod örneği özelliğinin ShowReadOnly kullanımını gösterir. Bu örnekte, özelliğinin OpenFileDialogShowReadOnly olarak ayarlandığı truekutu görüntülenir. Kullanıcı dosyayı salt okunur modda açma seçeneğine tıklarsa, OpenFile dosyayı açmak için yöntemi kullanılır. Aksi takdirde, FileStream sınıfı dosyayı okuma/yazma modunda açmak için kullanılır.

private:
   FileStream^ OpenFile()
   {
      // Displays an OpenFileDialog and shows the read/only files.
      OpenFileDialog^ dlgOpenFile = gcnew OpenFileDialog;
      dlgOpenFile->ShowReadOnly = true;
      if ( dlgOpenFile->ShowDialog() == ::DialogResult::OK )
      {
         // If ReadOnlyChecked is true, uses the OpenFile method to
         // open the file with read/only access.
         if ( dlgOpenFile->ReadOnlyChecked == true )
         {
            return dynamic_cast<FileStream^>(dlgOpenFile->OpenFile());
         }
         // Otherwise, opens the file with read/write access.
         else
         {
            String^ path = dlgOpenFile->FileName;
            return gcnew FileStream( path,System::IO::FileMode::Open,System::IO::FileAccess::ReadWrite );
         }
      }

      return nullptr;
   }

private FileStream OpenFile()
{
    // Displays an OpenFileDialog and shows the read/only files.

    OpenFileDialog dlgOpenFile = new OpenFileDialog();
    dlgOpenFile.ShowReadOnly = true;

    if(dlgOpenFile.ShowDialog() == DialogResult.OK)
    {

        // If ReadOnlyChecked is true, uses the OpenFile method to
        // open the file with read/only access.
        string path = null;

        try {
            if(dlgOpenFile.ReadOnlyChecked == true)
            {
                return (FileStream)dlgOpenFile.OpenFile();
            }

            // Otherwise, opens the file with read/write access.
            else
            {
                path = dlgOpenFile.FileName;
                return new FileStream(path, System.IO.FileMode.Open,
                            System.IO.FileAccess.ReadWrite);
            }
        } catch (SecurityException ex)
            {
                // The user lacks appropriate permissions to read files, discover paths, etc.
                MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
                    "Error message: " + ex.Message + "\n\n" +
                    "Details (send to Support):\n\n" + ex.StackTrace
                );
            }
            catch (Exception ex)
            {
                // Could not load the image - probably related to Windows file system permissions.
                MessageBox.Show("Cannot display the image: " + path.Substring(path.LastIndexOf('\\'))
                    + ". You may not have permission to read the file, or " +
                    "it may be corrupt.\n\nReported error: " + ex.Message);
            }
    }

    return null;
}

Private Function OpenFile() As FileStream

    ' Displays an OpenFileDialog and shows the read/only files.

    Dim DlgOpenFile As New OpenFileDialog()
    DlgOpenFile.ShowReadOnly = True

    If DlgOpenFile.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
        Dim path As New String("")

        ' If ReadOnlyChecked is true, uses the OpenFile method to
        ' open the file with read/only access.
        Try
            If (DlgOpenFile.ReadOnlyChecked = True) Then
                Return DlgOpenFile.OpenFile()
            Else
                ' Otherwise, opens the file with read/write access.
                Path = DlgOpenFile.FileName
                Return New FileStream(Path, System.IO.FileMode.Open, _
                        System.IO.FileAccess.ReadWrite)
            End If
        Catch SecEx As SecurityException
            ' The user lacks appropriate permissions to read files, discover paths, etc.
            MessageBox.Show("Security error. Please contact your administrator for details.\n\n" & _
                "Error message: " & SecEx.Message * "\n\n" & _
                "Details (send to Support):\n\n" & SecEx.StackTrace)
        Catch Ex As Exception
            ' Could not load the image - probably related to Windows file system permissions.
            MessageBox.Show("Cannot display the image: " & path.Substring(path.LastIndexOf("\\")) & _
                     ". You may not have permission to read the file, or " & _
                    "it may be corrupt.\n\nReported error: " + ex.Message)
        End Try
    End If

    Return Nothing
End Function

Ayrıca bkz.

• ReadOnlyChecked