internal static extern int SHBrowseForFolder([In] BROWSEINFO lpbi);
internal DialogResult ShowDialog()
{
IWin32Window owner = null;
int[] pidlRoot = new int[1];
// Get/find an owner HWND for this dialog
IntPtr hwndOwner;
if (owner != null)
{
hwndOwner = owner.Handle;
}
else
{
hwndOwner = GetActiveWindow();
}
// Get the IDL for the specific startLocation
Shell32.SHGetSpecialFolderLocation(hwndOwner, (int)startLocation, pidlRoot);
if (pidlRoot[0] == 0)
{
// UNDONE, fabioy:
// Show we throw an exception here instead?
return(DialogResult.Cancel);
}
int mergedOptions = (int)publicOptions | (int)privateOptions;
// UNDONE, fabioy:
// Expose the display name as another property.
int pidlRet = 0;
try {
// Construct a BROWSEINFO
BROWSEINFO bi = new BROWSEINFO();
IntPtr buffer = (IntPtr)Marshal.AllocHGlobal(MAX_PATH);
bi.pidlRoot = pidlRoot[0];
bi.hwndOwner = hwndOwner;
bi.pszDisplayName = buffer;
bi.lpszTitle = descriptionText;
bi.ulFlags = mergedOptions;
bi.lpfn = (IntPtr)0;
bi.lParam = 0;
bi.iImage = (IntPtr)0;
// And show the dialog
pidlRet = Shell32.SHBrowseForFolder(bi);
if (pidlRet == 0)
{
// User pressed Cancel
return(DialogResult.Cancel);
}
// Then retrieve the path from the IDList
//Shell32.SHGetPathFromIDList(pidlRet, buffer);
// Convert to a string
directoryPath = Marshal.PtrToStringUni(buffer);
// Then free all the stuff we've allocated or the SH API gave us
Marshal.FreeHGlobal(buffer);
}
finally {
IMalloc malloc = GetSHMalloc();
malloc.Free(pidlRoot[0]);
if (pidlRet != 0)
{
malloc.Free(pidlRet);
}
}
return(DialogResult.OK);
}
