Accessory for FileDialog

Question

Is it possible to add an accessory to a FileDialog like a thumbnail preview Panel TextBox etc? I know Java's JFileChooser can do it so I assume C# can too. Thanks. Neil

neil 0 · Answer

Perhaps but why reinvent the wheel? I guess because Microsoft won't release their source code. Pitty. Sun does. I just thought of a great idea. I downloaded the source code to Mono. They are still working on the Windows.Forms but they did have a OpenFileDialog class. Not sure if it works or not but here it is: // // System.Windows.Forms.OpenFileDialog.cs // // Author: // stubbed out by Paul Osman (paul.osman@sympatico.ca) // Dennis Hayes (dennish@raytek.com) // Aleksey Ryabchuk ( ryabchuk@yahoo.com ) // (C) 2002 Ximian Inc // using System.ComponentModel; using System.IO; using System.Runtime.Remoting; using System; namespace System.Windows.Forms { // // Represents a common dialog box that displays the control // that allows the user to open a file. // public sealed class OpenFileDialog : FileDialog { bool multiselect; bool showReadOnly; bool readOnlyChecked; public OpenFileDialog() { setDefaults ( ); } public bool Multiselect { get { return multiselect; } set { multiselect = value;} } public bool ReadOnlyChecked { get { return readOnlyChecked; } set { readOnlyChecked = value; } } public bool ShowReadOnly { get { return showReadOnly; } set { showReadOnly = value;} } public override bool CheckFileExists { get { return base.CheckFileExists; } set { base.CheckFileExists = value;} } [MonoTODO] public Stream OpenFile() { return new FileStream ( FileName FileMode.Open FileAccess.Read ); } public override void Reset() { base.Reset ( ); setDefaults ( ); } internal protected override void initOpenFileName ( ref OPENFILENAME opf ) { base.initOpenFileName ( ref opf ); if ( Multiselect ) opf.Flags |= ( int ) ( OpenFileDlgFlags.OFN_ALLOWMULTISELECT ); if ( ShowReadOnly ) { opf.Flags &= ~( ( uint ) ( OpenFileDlgFlags.OFN_HIDEREADONLY ) ); if ( ReadOnlyChecked ) opf.Flags |= ( int ) ( OpenFileDlgFlags.OFN_READONLY ); } else opf.Flags |= (int)OpenFileDlgFlags.OFN_HIDEREADONLY; } private void setDefaults ( ) { CheckFileExists = true; multiselect = false; showReadOnly = false; readOnlyChecked = false; } } }

kovan · Answer

create your own using windows forms listview not very difficult

neil 0 · Answer

Good idea. OpenFileDialog is sealed but FileDialog is abstract. Is there any way to see the code for OpenFileDialog or does MS not provide that? Neil

kovan · Answer

you should make your own derive it from FileDialog