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using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Security.Permissions;
using System.Windows.Forms;
namespace WebBrowserInterop
{
public interface IWebBrowserInterop
{
object call(string message, object param);
void alert(string message);
}
[ComImport, TypeLibType(TypeLibTypeFlags.FHidden),
InterfaceType(ComInterfaceType.InterfaceIsIDispatch),
Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D")]
public interface DWebBrowserEvents2
{
/// <summary>
///
/// </summary>
/// <param name="ppDisp">
/// An interface pointer that, optionally, receives the IDispatch interface
/// pointer of a new WebBrowser object or an InternetExplorer object.
/// </param>
/// <param name="Cancel">
/// value that determines whether the current navigation should be canceled
/// </param>
/// <param name="dwFlags">
/// The flags from the NWMF enumeration that pertain to the new window
/// See http://msdn.microsoft.com/en-us/library/bb762518(VS.85).aspx.
/// </param>
/// <param name="bstrUrlContext">
/// The URL of the page that is opening the new window.
/// </param>
/// <param name="bstrUrl">The URL that is opened in the new window.</param>
[DispId(0x111)]
void NewWindow3(
[In, Out, MarshalAs(UnmanagedType.IDispatch)] ref object ppDisp,
[In, Out] ref bool Cancel,
[In] uint dwFlags,
[In, MarshalAs(UnmanagedType.BStr)] string bstrUrlContext,
[In, MarshalAs(UnmanagedType.BStr)] string bstrUrl);
[DispId(0x68)]
void DownloadComplete();
}
public partial class WebBrowserEx : WebBrowser
{
AxHost.ConnectionPointCookie cookie;
DWebBrowserEvent2Helper helper;
[Browsable(true)]
public event EventHandler DownloadComplete;
public event EventHandler<WebBrowserNewWindowEventArgs> NewWindow3;
[PermissionSetAttribute(SecurityAction.LinkDemand, Name = "FullTrust")]
public WebBrowserEx()
{
}
/// <summary>
/// Associates the underlying ActiveX control with a client that can
/// handle control events including NewWindow3 event.
/// </summary>
[PermissionSetAttribute(SecurityAction.LinkDemand, Name = "FullTrust")]
protected override void CreateSink()
{
base.CreateSink();
helper = new DWebBrowserEvent2Helper(this);
cookie = new AxHost.ConnectionPointCookie(
this.ActiveXInstance, helper, typeof(DWebBrowserEvents2));
}
/// <summary>
/// Releases the event-handling client attached in the CreateSink method
/// from the underlying ActiveX control
/// </summary>
[PermissionSetAttribute(SecurityAction.LinkDemand, Name = "FullTrust")]
protected override void DetachSink()
{
if (cookie != null)
{
cookie.Disconnect();
cookie = null;
}
base.DetachSink();
}
/// <summary>
/// Raises the NewWindow3 event.
/// </summary>
protected virtual void OnNewWindow3(WebBrowserNewWindowEventArgs e)
{
if (this.NewWindow3 != null)
{
this.NewWindow3(this, e);
}
}
protected virtual void OnDownloadComplete()
{
if (this.DownloadComplete != null)
{
this.DownloadComplete(this, null);
}
}
private class DWebBrowserEvent2Helper : StandardOleMarshalObject, DWebBrowserEvents2
{
private WebBrowserEx parent;
public DWebBrowserEvent2Helper(WebBrowserEx parent)
{
this.parent = parent;
}
/// <summary>
/// Raise the NewWindow3 event.
/// If an instance of WebBrowser2EventHelper is associated with the underlying
/// ActiveX control, this method will be called When the NewWindow3 event was
/// fired in the ActiveX control.
/// </summary>
public void NewWindow3(ref object ppDisp, ref bool Cancel, uint dwFlags,
string bstrUrlContext, string bstrUrl)
{
var e = new WebBrowserNewWindowEventArgs(bstrUrl, Cancel);
this.parent.OnNewWindow3(e);
Cancel = e.Cancel;
}
public void DownloadComplete()
{
this.parent.OnDownloadComplete();
}
}
}
public class WebBrowserNewWindowEventArgs : EventArgs
{
public String Url { get; set; }
public Boolean Cancel { get; set; }
public WebBrowserNewWindowEventArgs(String url, Boolean cancel)
{
this.Url = url;
this.Cancel = cancel;
}
}
}
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