C# 利用OpenFileDialog来选择文件夹
如果你搜索到这篇文章，那么证明你已经很嫌弃C#里自带的FolderBrowserDialog，又丑又不能输入路径，还不方便选择
以下代码是从国外网站弄的，直接在你的项目里添加就能使用。
/// <summary> /// Wraps System.Windows.Forms.OpenFileDialog to make it present /// a vista-style dialog. /// </summary> public class FolderSelectDialog { // Wrapped dialog System.Windows.Forms.OpenFileDialog ofd = null; /// <summary> /// Default constructor /// </summary> public FolderSelectDialog() { ofd = new System.Windows.Forms.OpenFileDialog(); ofd.Filter = "Folders|\n"; ofd.AddExtension = false; ofd.CheckFileExists = false; ofd.DereferenceLinks = true; ofd.Multiselect = false; } #region Properties /// <summary> /// Gets/Sets the initial folder to be selected. A null value selects the current directory. /// </summary> public string InitialDirectory { get { return ofd.InitialDirectory; } set { ofd.InitialDirectory = value == null || value.Length == 0 ? Environment.CurrentDirectory : value; } } /// <summary> /// Gets/Sets the title to show in the dialog /// </summary> public string Title { get { return ofd.Title; } set { ofd.Title = value == null ? "Select a folder" : value; } } /// <summary> /// Gets the selected folder /// </summary> public string FileName { get { return ofd.FileName; } } #endregion #region Methods /// <summary> /// Shows the dialog /// </summary> /// <returns>True if the user presses OK else false</returns> public bool ShowDialog() { return ShowDialog(IntPtr.Zero); } /// <summary> /// Shows the dialog /// </summary> /// <param name="hWndOwner">Handle of the control to be parent</param> /// <returns>True if the user presses OK else false</returns> 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; } #endregion } /// <summary> /// Creates IWin32Window around an IntPtr /// </summary> public class WindowWrapper : System.Windows.Forms.IWin32Window { /// <summary> /// Constructor /// </summary> /// <param name="handle">Handle to wrap</param> public WindowWrapper(IntPtr handle) { _hwnd = handle; } /// <summary> /// Original ptr /// </summary> public IntPtr Handle { get { return _hwnd; } } private IntPtr _hwnd; } /// <summary> /// This class is from the Front-End for Dosbox and is used to present a 'vista' dialog box to select folders. /// Being able to use a vista style dialog box to select folders is much better then using the shell folder browser. /// http://code.google.com/p/fed/ /// /// Example: /// var r = new Reflector("System.Windows.Forms"); /// </summary> public class Reflector { #region variables string m_ns; Assembly m_asmb; #endregion #region Constructors /// <summary> /// Constructor /// </summary> /// <param name="ns">The namespace containing types to be used</param> public Reflector(string ns) : this(ns, ns) { } /// <summary> /// Constructor /// </summary> /// <param name="an">A specific assembly name (used if the assembly name does not tie exactly with the namespace)</param> /// <param name="ns">The namespace containing types to be used</param> 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; } } } #endregion #region Methods /// <summary> /// Return a Type instance for a type 'typeName' /// </summary> /// <param name="typeName">The name of the type</param> /// <returns>A type instance</returns> 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[i], BindingFlags.NonPublic); } return type; } /// <summary> /// Create a new object of a named type passing along any params /// </summary> /// <param name="name">The name of the type to create</param> /// <param name="parameters"></param> /// <returns>An instantiated type</returns> 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; } /// <summary> /// Calls method 'func' on object 'obj' passing parameters 'parameters' /// </summary> /// <param name="obj">The object on which to excute function 'func'</param> /// <param name="func">The function to execute</param> /// <param name="parameters">The parameters to pass to function 'func'</param> /// <returns>The result of the function invocation</returns> public object Call(object obj, string func, params object[] parameters) { return Call2(obj, func, parameters); } /// <summary> /// Calls method 'func' on object 'obj' passing parameters 'parameters' /// </summary> /// <param name="obj">The object on which to excute function 'func'</param> /// <param name="func">The function to execute</param> /// <param name="parameters">The parameters to pass to function 'func'</param> /// <returns>The result of the function invocation</returns> public object Call2(object obj, string func, object[] parameters) { return CallAs2(obj.GetType(), obj, func, parameters); } /// <summary> /// Calls method 'func' on object 'obj' which is of type 'type' passing parameters 'parameters' /// </summary> /// <param name="type">The type of 'obj'</param> /// <param name="obj">The object on which to excute function 'func'</param> /// <param name="func">The function to execute</param> /// <param name="parameters">The parameters to pass to function 'func'</param> /// <returns>The result of the function invocation</returns> public object CallAs(Type type, object obj, string func, params object[] parameters) { return CallAs2(type, obj, func, parameters); } /// <summary> /// Calls method 'func' on object 'obj' which is of type 'type' passing parameters 'parameters' /// </summary> /// <param name="type">The type of 'obj'</param> /// <param name="obj">The object on which to excute function 'func'</param> /// <param name="func">The function to execute</param> /// <param name="parameters">The parameters to pass to function 'func'</param> /// <returns>The result of the function invocation</returns> 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); } /// <summary> /// Returns the value of property 'prop' of object 'obj' /// </summary> /// <param name="obj">The object containing 'prop'</param> /// <param name="prop">The property name</param> /// <returns>The property value</returns> public object Get(object obj, string prop) { return GetAs(obj.GetType(), obj, prop); } /// <summary> /// Returns the value of property 'prop' of object 'obj' which has type 'type' /// </summary> /// <param name="type">The type of 'obj'</param> /// <param name="obj">The object containing 'prop'</param> /// <param name="prop">The property name</param> /// <returns>The property value</returns> 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); } /// <summary> /// Returns an enum value /// </summary> /// <param name="typeName">The name of enum type</param> /// <param name="name">The name of the value</param> /// <returns>The enum value</returns> public object GetEnum(string typeName, string name) { Type type = GetType(typeName); FieldInfo fieldInfo = type.GetField(name); return fieldInfo.GetValue(null); } #endregion }
使用示例：
FolderSelectDialog dialog = new FolderSelectDialog(); if (dialog.ShowDialog(this.Handle)) { textBox1.Text = dialog.FileName; }
窗体效果（跟Visual Studio里面选择项目文件夹的窗体差不多，达到了我们想要的效果）
以下网址是文章来源：
http://www.lyquidity.com/devblog/?p=136