OpenFileDialog.OpenFile Method
Assembly: System.Windows.Forms (in system.windows.forms.dll)
The OpenFile method is used to provide a facility to quickly open a file from the dialog box. The file is opened in read-only mode for security purposes. To open a file in read/write mode, you must use another method, such as FileStream.
The following code example demonstrates how to use the OpenFile method. This example displays an OpenFileDialog with the ShowReadOnly property set to true. If the user clicks the option to open the file in read-only mode, 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; }
private FileStream OpenFile()
{
// Displays an OpenFileDialog and shows the read/only files.
OpenFileDialog dlgOpenFile = new OpenFileDialog();
dlgOpenFile.set_ShowReadOnly(true);
if (dlgOpenFile.ShowDialog().Equals(get_DialogResult().OK)) {
// If ReadOnlyChecked is true, uses the OpenFile method to
// open the file with read/only access.
if (dlgOpenFile.get_ReadOnlyChecked() == true) {
return (FileStream)dlgOpenFile.OpenFile();
}
// Otherwise, opens the file with read/write access.
else {
String path = dlgOpenFile.get_FileName();
return new FileStream(path, System.IO.FileMode.Open,
System.IO.FileAccess.ReadWrite);
}
}
return null;
} //OpenFile
- FileDialogPermission to open a file. Associated enumeration: FileDialogPermissionAccess.Open.
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.