public static extern IntPtr SHBrowseForFolder(ref BrowseInfo lbpi);
public static extern IntPtr SHBrowseForFolder(ref BrowseInfo lbpi);
/// <summary>
/// Displays the folder browser dialog.
/// </summary>
/// <param name="hwndOwner">Handle to the window that owns the dialog box.</param>
/// <returns>
/// If the user clicks the OK button of the dialog that is displayed, true is returned; otherwise, false.
/// </returns>
protected override bool RunDialog(IntPtr hwndOwner)
{
var result = false;
IntPtr pidlRoot = IntPtr.Zero,
pszPath = IntPtr.Zero,
pidlSelected = IntPtr.Zero;
SelectedPath = string.Empty;
try
{
if (UseSpecialFolderRoot)
Shell32.SHGetFolderLocation(hwndOwner, (int)RootSpecialFolder, IntPtr.Zero, 0, out pidlRoot);
else // RootType == Path
{
uint iAttribute;
Shell32.SHParseDisplayName(RootPath, IntPtr.Zero, out pidlRoot, 0, out iAttribute);
}
var browseInfo = new BrowseInfo
{
HwndOwner = hwndOwner,
Root = pidlRoot,
DisplayName = new string(' ', 256),
Title = Title,
Flags = _dialogOptions,
LParam = 0,
Callback = HookProc
};
// Show dialog
pidlSelected = Shell32.SHBrowseForFolder(ref browseInfo);
if (pidlSelected != IntPtr.Zero)
{
result = true;
pszPath = Marshal.AllocHGlobal(260 * Marshal.SystemDefaultCharSize);
Shell32.SHGetPathFromIDList(pidlSelected, pszPath);
SelectedPath = Marshal.PtrToStringAuto(pszPath);
}
}
finally // release all unmanaged resources
{
var malloc = GetSHMalloc();
if (pidlRoot != IntPtr.Zero)
malloc.Free(pidlRoot);
if (pidlSelected != IntPtr.Zero)
malloc.Free(pidlSelected);
if (pszPath != IntPtr.Zero)
Marshal.FreeHGlobal(pszPath);
Marshal.ReleaseComObject(malloc);
}
return result;
}
