在WinForms中，我们使用以下代码浏览文件夹 - 只要操作系统支持，它就会使用较新的Vista样式文件夹对话框：
http://localhost:63342/myApp/main/webapp/vendors/jquery/1.12.0/jquery.min.js
使用反射器方法，它是基于WinForms中的System.Windows.Forms.OpenFileDialog的文件夹选择对话框。同样，我们应该能够实现基于Microsoft.Win32.OpenFileDialog的文件夹对话框。
e.g。
// http://www.lyquidity.com/devblog/?p=136
using ShareX.HelpersLib.Properties;
using System;
using System.Reflection;
using System.Windows.Forms;
namespace ShareX.HelpersLib
{
/// <summary>
/// Wraps System.Windows.Forms.OpenFileDialog to make it present
/// a vista-style dialog.
/// </summary>
public class FolderSelectDialog : IDisposable
{
// Wrapped dialog
private OpenFileDialog ofd;
/// <summary>
/// Default constructor
/// </summary>
public FolderSelectDialog()
{
ofd = new OpenFileDialog();
ofd.Filter = "Folders|\n";
ofd.AddExtension = false;
ofd.CheckFileExists = false;
ofd.DereferenceLinks = true;
ofd.Multiselect = false;
}
/// <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 = string.IsNullOrEmpty(value) ? Environment.CurrentDirectory : value;
}
}
/// <summary>
/// Gets/Sets the title to show in the dialog
/// </summary>
public string Title
{
get
{
return ofd.Title;
}
set
{
ofd.Title = string.IsNullOrEmpty(value) ? Resources.FolderSelectDialog_Title_Select_a_folder : value;
}
}
/// <summary>
/// Gets the selected folder
/// </summary>
public string FileName
{
get
{
return ofd.FileName;
}
}
/// <summary>
/// Shows the dialog
/// </summary>
/// <returns>True if the user presses OK else false</returns>
public bool ShowDialog()
{
return ShowDialog(NativeMethods.GetActiveWindow());
}
/// <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;
if (Helpers.IsWindowsVistaOrGreater())
{
Reflector 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(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
{
using (FolderBrowserDialog fbd = new FolderBrowserDialog())
{
fbd.Description = Title;
fbd.SelectedPath = InitialDirectory;
if (fbd.ShowDialog(new WindowWrapper(hWndOwner)) != DialogResult.OK) return false;
ofd.FileName = fbd.SelectedPath;
flag = true;
}
}
return flag;
}
public void Dispose()
{
if (ofd != null)
{
ofd.Dispose();
}
}
}
/// <summary>
/// Creates IWin32Window around an IntPtr
/// </summary>
internal class WindowWrapper : 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>
internal class Reflector
{
#region variables
private string m_ns;
private Assembly m_asmb;
#endregion variables
#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 Constructors
#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 Methods
}
}
我想尝试这个，但我想知道之前是否做过类似的尝试。
我也想知道正确导演中的任何指针，以查询某些基于字符串的参数，例如
Reflector r = new Reflector("Microsoft.Win32.OpenFileDialog");
除非您使用特定工具查询这些内容，否则这些内容不会暴露。
谢谢和问候 迈克尔