实现IDispatch ::调用由WebBrowser控件调用 [英] Implement IDispatch::Invoke to be called by a WebBrowser control
问题描述
我试图做什么，他们对<一个解释href=\"http://msdn.microsoft.com/en-us/library/aa770041%28VS.85%29.aspx#Controlling_Download_and_Execution\">this本文中的控制下载和执行部分。据我所知， Web浏览器控件在这方面是不是.NET的 web浏览器。
I'm trying to do what they explain on this article in the Controlling Download and Execution section. I understand the Web Browser Control in that context is not .NET's WebBrowser.
我试图做的是获取对什么 web浏览器控制下载的控制。我一直在寻找这个有很多，总是连接起来的 csEXWB ，其中有一个巨大的code，我只是无法破译。
What I'm trying to do is to gain control over what the WebBrowser control downloads. I've been searching for this a lot and always en up in the csEXWB, which has a huge code that I just cannot decipher.
我到目前为止已经做的是继承.NET的 web浏览器，让我的继承类的COM可见使用 [标记有ComVisible特性（真）] 属性，这种方法添加到我的班（从csEXWB拍摄）：
What I've done so far is inherit .NET's WebBrowser, make my inherited class com visible by using the [ComVisible(true)] attribute, add this method to my class (taken from csEXWB):
[DispId(HTMLDispIDs.DISPID_AMBIENT_DLCONTROL)]
public int Idispatch_AmbiantDlControl_Invoke_Handler()
{
return (int)m_DLCtlFlags;
}
，然后调用该行code，其中浏览器是我的派生类的一个实例：
And then call this line of code, where Browser is an instance of my derived class:
IfacesEnumsStructsClasses.IOleControl oleControl = Browser.ActiveXInstance as IfacesEnumsStructsClasses.IOleControl;
oleControl.OnAmbientPropertyChange(IfacesEnumsStructsClasses.HTMLDispIDs.DISPID_AMBIENT_DLCONTROL);
那么，我希望的是， OLECONTROL 会打电话给我的 Idispatch_AmbiantDlControl_Invoke_Handler 方法，它不。我不知道怎么了，这也许正是我的code缺失，是 OLECONTROL 应该知道在哪个对象打电话给我 Idispatch_AmbiantDlControl_Invoke_Handler 方法。
So what I'm hoping is that the oleControl will call my Idispatch_AmbiantDlControl_Invoke_Handler method, which it doesn't. I don't know how, and this is probably what my code is missing, is the oleControl supposed to know on which object to call my Idispatch_AmbiantDlControl_Invoke_Handler method.
我上面链接的文章说的是它会调用你的IDispatch ::调用。这是什么意思您。我如何告诉 OLECONTROL 哪个对象是我的的IDispatch 。希望我做任何意义。
What the article I linked above says is it will call your IDispatch::Invoke. What does it mean by your. How do I tell oleControl which object is my IDispatch. Hope I'm making any sense.
推荐答案
下面是一个定制的web浏览器，允许你改变DLCONTROL标志。
Here is a customized WebBrowser that allows you to change the DLCONTROL flags.
这是一个例子code：
This is an example code:
public partial class Form1 : Form
{
private MyWebBrowser _webBrowser;
public Form1()
{
InitializeComponent();
_webBrowser = new MyWebBrowser();
_webBrowser.Dock = DockStyle.Fill;
Controls.Add(_webBrowser);
}
private void button1_Click(object sender, EventArgs e)
{
_webBrowser.DownloadControlFlags = (int)WebBrowserDownloadControlFlags.DOWNLOADONLY;
_webBrowser.Navigate("http://mysamplewebsite");
}
}
和定制的web浏览器code：
And the customized WebBrowser code:
public class MyWebBrowser : WebBrowser
{
private const int DISPID_AMBIENT_DLCONTROL = -5512;
private int _downloadControlFlags;
// we want our site class, not the default one
protected override WebBrowserSiteBase CreateWebBrowserSiteBase()
{
return new MyWebBrowserSite(this);
}
[DispId(DISPID_AMBIENT_DLCONTROL)]
public int DownloadControlFlags
{
get
{
return _downloadControlFlags;
}
set
{
if (_downloadControlFlags == value)
return;
_downloadControlFlags = value;
IOleControl ctl = (IOleControl)ActiveXInstance;
ctl.OnAmbientPropertyChange(DISPID_AMBIENT_DLCONTROL);
}
}
protected class MyWebBrowserSite : WebBrowserSite, IReflect
{
private Dictionary<int, PropertyInfo> _dispidCache;
private MyWebBrowser _host;
public MyWebBrowserSite(MyWebBrowser host)
: base(host)
{
_host = host;
}
object IReflect.InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] namedParameters)
{
object ret = null;
// Check direct IDispatch call using a dispid (see http://msdn.microsoft.com/en-us/library/de3dhzwy.aspx)
const string dispidToken = "[DISPID=";
if (name.StartsWith(dispidToken))
{
int dispid = int.Parse(name.Substring(dispidToken.Length, name.Length - dispidToken.Length - 1));
if (_dispidCache == null)
{
// WebBrowser has many properties, so we build a dispid cache on it
_dispidCache = new Dictionary<int, PropertyInfo>();
foreach (PropertyInfo pi in _host.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if ((!pi.CanRead) || (pi.GetIndexParameters().Length > 0))
continue;
object[] atts = pi.GetCustomAttributes(typeof(DispIdAttribute), true);
if ((atts != null) && (atts.Length > 0))
{
DispIdAttribute da = (DispIdAttribute)atts[0];
_dispidCache[da.Value] = pi;
}
}
}
PropertyInfo property;
if (_dispidCache.TryGetValue(dispid, out property))
{
ret = property.GetValue(_host, null);
}
}
return ret;
}
FieldInfo[] IReflect.GetFields(BindingFlags bindingAttr)
{
return GetType().GetFields(bindingAttr);
}
MethodInfo[] IReflect.GetMethods(BindingFlags bindingAttr)
{
return GetType().GetMethods(bindingAttr);
}
PropertyInfo[] IReflect.GetProperties(BindingFlags bindingAttr)
{
return GetType().GetProperties(bindingAttr);
}
FieldInfo IReflect.GetField(string name, BindingFlags bindingAttr)
{
throw new NotImplementedException();
}
MemberInfo[] IReflect.GetMember(string name, BindingFlags bindingAttr)
{
throw new NotImplementedException();
}
MemberInfo[] IReflect.GetMembers(BindingFlags bindingAttr)
{
throw new NotImplementedException();
}
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr)
{
throw new NotImplementedException();
}
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers)
{
throw new NotImplementedException();
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
{
throw new NotImplementedException();
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr)
{
throw new NotImplementedException();
}
Type IReflect.UnderlyingSystemType
{
get { throw new NotImplementedException(); }
}
}
[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("B196B288-BAB4-101A-B69C-00AA00341D07")]
internal interface IOleControl
{
void Reserved0();
void Reserved1();
void OnAmbientPropertyChange(int dispID);
void Reserved2();
}
}
[Flags]
public enum WebBrowserDownloadControlFlags: uint
{
DLIMAGES = 0x00000010,
VIDEOS = 0x00000020,
BGSOUNDS = 0x00000040,
NO_SCRIPTS = 0x00000080,
NO_JAVA = 0x00000100,
NO_RUNACTIVEXCTLS = 0x00000200,
NO_DLACTIVEXCTLS = 0x00000400,
DOWNLOADONLY = 0x00000800,
NO_FRAMEDOWNLOAD = 0x00001000,
RESYNCHRONIZE = 0x00002000,
PRAGMA_NO_CACHE = 0x00004000,
NO_BEHAVIORS = 0x00008000,
NO_METACHARSET = 0x00010000,
URL_ENCODING_DISABLE_UTF8 = 0x00020000,
URL_ENCODING_ENABLE_UTF8 = 0x00040000,
NOFRAMES = 0x00080000,
FORCEOFFLINE = 0x10000000,
NO_CLIENTPULL = 0x20000000,
SILENT = 0x40000000,
OFFLINEIFNOTCONNECTED = 0x80000000,
OFFLINE = OFFLINEIFNOTCONNECTED,
}
这篇关于实现IDispatch ::调用由WebBrowser控件调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
