/// <summary>
/// Shows the folder browser dialog box with the specified owner window.
/// </summary>
public DialogResult ShowDialog(IWin32Window owner)
{
IntPtr pidlRoot = IntPtr.Zero;
// Get/find an owner HWND for this dialog.
IntPtr hWndOwner;
if (owner != null)
{
hWndOwner = owner.Handle;
}
else
{
hWndOwner = WindowsAPI.GetActiveWindow( );
}
// Get the IDL for the specific startLocation.
WindowsAPI.SHGetSpecialFolderLocation(hWndOwner, (int)startLocation, out pidlRoot);
if (pidlRoot == IntPtr.Zero)
{
return(DialogResult.Cancel);
}
int mergedOptions = (int)publicOptions | (int)privateOptions;
if ((mergedOptions & (int)WindowsAPI.Shell32.BffStyles.NewDialogStyle) != 0)
{
Application.OleRequired( );
}
IntPtr pidlRet = IntPtr.Zero;
try
{
// Construct a BROWSEINFO.
WindowsAPI.Shell32.BROWSEINFO bi = new WindowsAPI.Shell32.BROWSEINFO( );
IntPtr buffer = Marshal.AllocHGlobal(MAX_PATH);
bi.pidlRoot = pidlRoot;
bi.hwndOwner = hWndOwner;
bi.pszDisplayName = buffer;
bi.lpszTitle = descriptionText;
bi.ulFlags = mergedOptions;
// The rest of the fields are initialized to zero by the constructor.
// bi.lpfn = null; bi.lParam = IntPtr.Zero; bi.iImage = 0;
// Show the dialog.
pidlRet = WindowsAPI.SHBrowseForFolder(ref bi);
// Free the buffer you've allocated on the global heap.
Marshal.FreeHGlobal(buffer);
if (pidlRet == IntPtr.Zero)
{
// User clicked Cancel.
return(DialogResult.Cancel);
}
// Then retrieve the path from the IDList.
StringBuilder sb = new StringBuilder(MAX_PATH);
if (0 == WindowsAPI.SHGetPathFromIDList(pidlRet, sb))
{
return(DialogResult.Cancel);
}
// Convert to a string.
directoryPath = sb.ToString( );
}
finally
{
WindowsAPI.IMalloc malloc = GetSHMalloc( );
malloc.Free(pidlRoot);
if (pidlRet != IntPtr.Zero)
{
malloc.Free(pidlRet);
}
}
return(DialogResult.OK);
}
/// <summary>
/// Shows the folder browser dialog box with the specified owner window.
/// </summary>
public DialogResult ShowDialog ( IWin32Window owner )
{
IntPtr pidlRoot = IntPtr.Zero;
// Get/find an owner HWND for this dialog.
IntPtr hWndOwner;
if ( owner != null )
{
hWndOwner = owner.Handle;
}
else
{
hWndOwner = WindowsAPI.GetActiveWindow ( );
}
// Get the IDL for the specific startLocation.
WindowsAPI.SHGetSpecialFolderLocation ( hWndOwner, (int) startLocation, out pidlRoot );
if (pidlRoot == IntPtr.Zero)
{
return DialogResult.Cancel;
}
int mergedOptions = (int)publicOptions | (int)privateOptions;
if ( ( mergedOptions & (int)WindowsAPI.Shell32.BffStyles.NewDialogStyle ) != 0 )
{
Application.OleRequired ( );
}
IntPtr pidlRet = IntPtr.Zero;
try
{
// Construct a BROWSEINFO.
WindowsAPI.Shell32.BROWSEINFO bi = new WindowsAPI.Shell32.BROWSEINFO ( );
IntPtr buffer = Marshal.AllocHGlobal ( MAX_PATH);
bi.pidlRoot = pidlRoot;
bi.hwndOwner = hWndOwner;
bi.pszDisplayName = buffer;
bi.lpszTitle = descriptionText;
bi.ulFlags = mergedOptions;
// The rest of the fields are initialized to zero by the constructor.
// bi.lpfn = null; bi.lParam = IntPtr.Zero; bi.iImage = 0;
// Show the dialog.
pidlRet = WindowsAPI.SHBrowseForFolder ( ref bi );
// Free the buffer you've allocated on the global heap.
Marshal.FreeHGlobal ( buffer );
if ( pidlRet == IntPtr.Zero )
{
// User clicked Cancel.
return DialogResult.Cancel;
}
// Then retrieve the path from the IDList.
StringBuilder sb = new StringBuilder ( MAX_PATH );
if ( 0 == WindowsAPI.SHGetPathFromIDList ( pidlRet, sb ) )
{
return DialogResult.Cancel;
}
// Convert to a string.
directoryPath = sb.ToString ( );
}
finally
{
WindowsAPI.IMalloc malloc = GetSHMalloc ( );
malloc.Free ( pidlRoot );
if ( pidlRet != IntPtr.Zero )
{
malloc.Free ( pidlRet );
}
}
return DialogResult.OK;
}
