The code is below:
PowerShell Code
Double-click the code block to select all.Function BuildDialog { $sourcecode = @" using System; using System.Windows.Forms; using System.Reflection; namespace FolderSelect { public class FolderSelectDialog { System.Windows.Forms.OpenFileDialog ofd = null; public FolderSelectDialog() { ofd = new System.Windows.Forms.OpenFileDialog(); ofd.Filter = "Folders|\n"; ofd.AddExtension = false; ofd.CheckFileExists = false; ofd.DereferenceLinks = true; ofd.Multiselect = false; } public string InitialDirectory { get { return ofd.InitialDirectory; } set { ofd.InitialDirectory = value == null || value.Length == 0 ? Environment.CurrentDirectory : value; } } public string Title { get { return ofd.Title; } set { ofd.Title = value == null ? "Select a folder" : value; } } public string FileName { get { return ofd.FileName; } } public bool ShowDialog() { return ShowDialog(IntPtr.Zero); } public bool ShowDialog(IntPtr hWndOwner) { bool flag = false; if (Environment.OSVersion.Version.Major >= 6) { var r = new Reflector("System.Windows.Forms"); uint num = 0; Type typeIFileDialog = r.GetType("FileDialogNative.IFileDialog"); object dialog = r.Call(ofd, "CreateVistaDialog"); r.Call(ofd, "OnBeforeVistaDialog", dialog); uint options = (uint)r.CallAs(typeof(System.Windows.Forms.FileDialog), ofd, "GetOptions"); options |= (uint)r.GetEnum("FileDialogNative.FOS", "FOS_PICKFOLDERS"); r.CallAs(typeIFileDialog, dialog, "SetOptions", options); object pfde = r.New("FileDialog.VistaDialogEvents", ofd); object[] parameters = new object[] { pfde, num }; r.CallAs2(typeIFileDialog, dialog, "Advise", parameters); num = (uint)parameters[1]; try { int num2 = (int)r.CallAs(typeIFileDialog, dialog, "Show", hWndOwner); flag = 0 == num2; } finally { r.CallAs(typeIFileDialog, dialog, "Unadvise", num); GC.KeepAlive(pfde); } } else { var fbd = new FolderBrowserDialog(); fbd.Description = this.Title; fbd.SelectedPath = this.InitialDirectory; fbd.ShowNewFolderButton = false; if (fbd.ShowDialog(new WindowWrapper(hWndOwner)) != DialogResult.OK) return false; ofd.FileName = fbd.SelectedPath; flag = true; } return flag; } } public class WindowWrapper : System.Windows.Forms.IWin32Window { public WindowWrapper(IntPtr handle) { _hwnd = handle; } public IntPtr Handle { get { return _hwnd; } } private IntPtr _hwnd; } public class Reflector { string m_ns; Assembly m_asmb; public Reflector(string ns) : this(ns, ns) { } public Reflector(string an, string ns) { m_ns = ns; m_asmb = null; foreach (AssemblyName aN in Assembly.GetExecutingAssembly().GetReferencedAssemblies()) { if (aN.FullName.StartsWith(an)) { m_asmb = Assembly.Load(aN); break; } } } public Type GetType(string typeName) { Type type = null; string[] names = typeName.Split('.'); if (names.Length > 0) type = m_asmb.GetType(m_ns + "." + names[0]); for (int i = 1; i < names.Length; ++i) { type = type.GetNestedType(names, BindingFlags.NonPublic); } return type; } public object New(string name, params object[] parameters) { Type type = GetType(name); ConstructorInfo[] ctorInfos = type.GetConstructors(); foreach (ConstructorInfo ci in ctorInfos) { try { return ci.Invoke(parameters); } catch { } } return null; } public object Call(object obj, string func, params object[] parameters) { return Call2(obj, func, parameters); } public object Call2(object obj, string func, object[] parameters) { return CallAs2(obj.GetType(), obj, func, parameters); } public object CallAs(Type type, object obj, string func, params object[] parameters) { return CallAs2(type, obj, func, parameters); } public object CallAs2(Type type, object obj, string func, object[] parameters) { MethodInfo methInfo = type.GetMethod(func, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); return methInfo.Invoke(obj, parameters); } public object Get(object obj, string prop) { return GetAs(obj.GetType(), obj, prop); } public object GetAs(Type type, object obj, string prop) { PropertyInfo propInfo = type.GetProperty(prop, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); return propInfo.GetValue(obj, null); } public object GetEnum(string typeName, string name) { Type type = GetType(typeName); FieldInfo fieldInfo = type.GetField(name); return fieldInfo.GetValue(null); } } } "@ $assemblies = ('System.Windows.Forms', 'System.Reflection') Add-Type -TypeDefinition $sourceCode -ReferencedAssemblies $assemblies -ErrorAction STOP }
Placing the function name "BuildDialog" in the load event places it in memory and then you can call it with something like:
PowerShell Code
Double-click the code block to select all.$fsd = New-Object FolderSelect.FolderSelectDialog $fsd.Title = "What to select"; $fsd.ShowDialog() | Out-Null
Getting the selected path back is as simple as:
PowerShell Code
Double-click the code block to select all.$SourceFolder = $fsd.FileName
I hope people find it useful.
Pete