OpenFileDialog::ReadOnlyChecked Property

 

Gets or sets a value indicating whether the read-only check box is selected.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

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

Property Value

Type: System::Boolean

true if the read-only check box is selected; otherwise, false. The default value is false.

The ReadOnlyChecked state does not affect the read/write mode that OpenFileDialog::OpenFile uses to open a file selected in the dialog box. OpenFile will always open the file in read-only mode.

The ShowReadOnly property must be set before in order for the read-only check box to appear in the dialog box.

The following code example demonstrates the use of the ReadOnlyChecked property. This example displays the OpenFileDialog box with the ShowReadOnly property set to true. If the user clicks the option to open the file in read-only mode, the ReadOnlyChecked property evaluates to true, and the OpenFile method is used to open the file. Otherwise, the FileStream class is used to open the file in read/write mode.

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;
   }

.NET Framework
Available since 1.1
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