OpenFileDialog Class
Represents a common dialog box that displays the control that allows the user to open a file. This class cannot be inherited.
For a list of all members of this type, see OpenFileDialog Members.
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.CommonDialog
System.Windows.Forms.FileDialog
System.Windows.Forms.OpenFileDialog
[Visual Basic] NotInheritable Public Class OpenFileDialog Inherits FileDialog [C#] public sealed class OpenFileDialog : FileDialog [C++] public __gc __sealed class OpenFileDialog : public FileDialog [JScript] public class OpenFileDialog extends FileDialog
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Remarks
This class allows you to check whether a file exists and to open it. The ShowReadOnly property determines whether a read-only check box appears in the dialog box. The ReadOnlyChecked property indicates whether the read-only check box is checked.
Most of the functionality for this class is found in the FileDialog class.
Example
[Visual Basic, C#, C++] The following example creates an OpenFileDialog, sets several properties, and displays the dialog box using the CommonDialog.ShowDialog method. The example assumes a form with a Button placed on it and the System.IO namespace added to it.
[Visual Basic] Protected Sub button1_Click(sender As Object, e As System.EventArgs) Dim myStream As Stream Dim openFileDialog1 As New OpenFileDialog() openFileDialog1.InitialDirectory = "c:\" openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" openFileDialog1.FilterIndex = 2 openFileDialog1.RestoreDirectory = True If openFileDialog1.ShowDialog() = DialogResult.OK Then myStream = openFileDialog1.OpenFile() If Not (myStream Is Nothing) Then ' Insert code to read the stream here. myStream.Close() End If End If End Sub [C#] protected void button1_Click(object sender, System.EventArgs e) { Stream myStream; OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.InitialDirectory = "c:\\" ; openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ; openFileDialog1.FilterIndex = 2 ; openFileDialog1.RestoreDirectory = true ; if(openFileDialog1.ShowDialog() == DialogResult.OK) { if((myStream = openFileDialog1.OpenFile())!= null) { // Insert code to read the stream here. myStream.Close(); } } } [C++] protected: void button1_Click(Object* /*sender*/, System::EventArgs* /*e*/) { Stream* myStream; OpenFileDialog* openFileDialog1 = new OpenFileDialog(); openFileDialog1->InitialDirectory = S"c:\\" ; openFileDialog1->Filter = S"txt files (*.txt)|*.txt|All files (*.*)|*.*" ; openFileDialog1->FilterIndex = 2 ; openFileDialog1->RestoreDirectory = true ; if(openFileDialog1->ShowDialog() == DialogResult::OK) { if((myStream = openFileDialog1->OpenFile())!= 0) { // Insert code to read the stream here. myStream->Close(); } } }
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
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Requirements
Namespace: System.Windows.Forms
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
See Also
OpenFileDialog Members | System.Windows.Forms Namespace | FileDialog | CommonDialog