Should CNET request. Hand over the catalogue browsing class. This was written a few months ago. (from ASP.net edition)

asp.net using System;
Using System.Text;
Using System.Windows.Forms;
Using System.Runtime.InteropServices;

Namespace Blood.Com.ClassLib
{
<summary>
Directory dialog box control
</summary>
public class Directorydialog
{
[StructLayout (LayoutKind.Sequential, Charset=charset.ansi)]
<summary>
Browse Information
</summary>
public struct BROWSEINFO
{
Public IntPtr hWndOwner;
public int pidlroot;
public string pszDisplayName;
public string Lpsztitle;
public int ulflags;
public int lpfncallback;
public int lParam;
public int iimage;
}

Private Const int MAX_PATH = 260;
<summary>
Specify browse type
</summary>
public enum Browsefortypes
{
<summary>
Browsing computers
</summary>
Computers = 0x1000,
<summary>
Browse Catalog
</summary>
directories = 0x1,
<summary>
Browse Directories and files
</summary>
<remarks> can only work on versions of 4.71 or higher <remarks>
Filesanddirectories = 0x4000,//4.71 Edition
<summary>
Browse system root Directory
</summary>
Filesystemancestors = 0x8
}

[DllImport ("Ole32.dll")]
private static extern int CoTaskMemFree (IntPtr hmem);
[DllImport ("kernel32.dll")]
private static extern IntPtr Lstrcat (string lpString1, string lpString2);
[DllImport ("Shell32.dll")]
private static extern IntPtr SHBrowseForFolder (ref browseinfo LPBI);
[DllImport ("Shell32.dll")]
private static extern int SHGetPathFromIDList (IntPtr pidlist, StringBuilder lpbuffer);
<summary>
Show public Folder dialog box
</summary>
<param name= "hWndOwner" > Folder dialog box owner </param>
protected bool RunDialog (INTPTR hWndOwner)
{
Browseinfo Udtbi = new Browseinfo ();
IntPtr lpIDList;
GCHandle htitle = GCHandle.Alloc (Title, gchandletype.pinned);
Set the owner of Windows
Udtbi.hwndowner = hWndOwner;
Set the owner of Windows
Udtbi.lpsztitle = Title;
Set the owner of Windows
Udtbi.ulflags = (int) browsefor;
Create a string buffer to display the name
StringBuilder buffer = new StringBuilder (MAX_PATH);
Buffer. Length = MAX_PATH;
Udtbi.pszdisplayname = buffer. ToString ();
Show Browse Directory dialog box
lpIDList = SHBrowseForFolder (ref UDTBI);
Htitle.free ();
if (Lpidlist.toint64 ()!= 0)
{
if (browsefor = = browsefortypes.computers)
{
m_selected = UdtBI.pszDisplayName.Trim ();
}
Else
{
StringBuilder path = new StringBuilder (MAX_PATH);
Get the path from the lpIDList
SHGetPathFromIDList (lpidlist, path);
m_selected = path. ToString ();
}
Free memory
CoTaskMemFree (lpIDList);
}
Else
{
return false;
}
return true;
}
<summary> Show Public Folders dialog box </summary>
Public DialogResult ShowDialog ()
{
return ShowDialog (NULL);
}
<summary>shows the Common folder dialog.</summary>
<param name= "owner" >the owner of the folder dialog.</param>
Public DialogResult ShowDialog (IWin32Window owner)
{
INTPTR handle;
if (owner!= null)
Handle = owner. Handle;
Else
handle = IntPtr.Zero;
if (RunDialog (handle))
{
return DialogResult.OK;
}
Else
{
return dialogresult.cancel;
}
}

<summary>
Specify the title of the dialog box
</summary>
<value> dialog box title </value>
<exceptions cref= "ArgumentNullException" > Null (vb.net is nothing) throws an error </exceptions>
public string Title
{
Get
{
return m_title;
}
Set
{
if (value = = null)
throw new ArgumentNullException ();
M_title = value;
}
}
<summary> Return selected Items </summary>
<value> Selected Projects </value>
public string Selected
{
Get
{
return m_selected;
}
}
<summary> Specify browse Type </summary>
<value> Browse Type </value>
Public Browsefortypes Browsefor
{
Get
{
return m_browsefor;
}
Set
{
M_browsefor = value;
}
}
Declaring private variables
Private Browsefortypes m_browsefor = browsefortypes.directories;
private string m_title = "";
private string m_selected = "";

<summary>
Constructors
</summary>
Public Directorydialog ()
{
//
TODO: Add constructor logic here
//
}
}
}