用于处理应用程序内弹出窗口的 Web 浏览器

我正在尝试使用 WebBrowser 控件启动弹出窗口的新表单，而不是在 IE 中打开它。我尝试使用 AxWebBrowser 来获取与 NewWindow3 事件一起使用的弹出窗口，并且只是做e.ppDisp = AxWebBrowser.Application，但是 AxWebBrowser 也有很多限制。因此，我尝试扩展普通的 WebBrowser 以包含像 AxWebBrowser 这样的 NewWindow3 事件，但遇到了问题。和e.ppDisp = AxWebBrowser.Application如果继续，我收到错误：“检测到 InvalidVariant”，然后是“指定的 OLE 变体无效”。

注意：这是我第一次扩展课程，所以我可能会忽略一些简单的东西。如果我尝试在新窗口中导航到新 URL，则会从该站点收到 java 脚本错误。

我已经根据评论更新了代码库。已删除 ExtendedWebBrowser 类以获得更小、更好的版本。这是新代码：

从主窗体和一个非常相似的 BrowserPopup 窗体 -

Protected Overrides Sub OnLoad(ByVal e As EventArgs)
    MyBase.OnLoad(e)
    nativeBrowser = DirectCast(ExtendedWebBrowser1.ActiveXInstance, SHDocVw.WebBrowser)
    AddHandler nativeBrowser.NewWindow3, AddressOf nativeBrowser_NewWindow3
    AddHandler nativeBrowser.WindowClosing, AddressOf nativeBrowser_WindowClosing
End Sub

Private Sub nativeBrowser_NewWindow3(ByRef ppDisp As Object, ByRef Cancel As Boolean, ByVal dwflags As UInteger, ByVal bStrUrlContext As String, ByVal bstrUrl As String)
    Dim popup = New BrowserPopup()
    popup.Show(Me)
    popup.browserPop.DocumentText = bStrUrlContext
    ppDisp = popup.browserPop.ActiveXInstance
End Sub

Private Sub nativeBrowser_WindowClosing(ByVal IsChildWindow As Boolean, ByRef Cancel As Boolean)
    MsgBox("working?") '<<<Doesn't Trigger>>>
End Sub

Protected Overrides Sub OnFormClosing(ByVal e As FormClosingEventArgs)
    MyBase.OnFormClosing(e)
End Sub

另外，如果有帮助的话，这里是页面中的脚本，应该能够关闭弹出表单，但似乎只是停用 WebBrowser。

<table isListBtn="false" cellpadding="0" enabled="true" class="buttonBorderBlue"
cellspacing="0" border="0" onClick="if (typeof(workpaneMediator_toolbar)!='undefined')
workpaneMediator_toolbar.onSelect('CANCEL_ACTION', this)"
actionType="CLOSE_WINDOW_TYPE" id="workpaneMediator_toolbar_CANCEL_ACTIONWrapper"
nowrap><tr><td class="buttonBlueTD">

你说得对WindowClosing不会因为 Winforms 被解雇WebBrowser控制，我确认这一点。这似乎是 .NET 中的一个长期错误WebBrowserActiveX 托管代码，该问题从未得到解决。查看这个帖子了解更多详细信息和可能的解决方法。

另一种可能的解决方法是直接通过托管 WebBrowser ActiveX 控件AxHost类，在这种情况下WindowClosing正确起火。例子：

C#:

using Microsoft.Win32;
using System;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WebBrowserApp
{
    // MainForm

    public partial class MainForm : Form 
    {
        WebBrowser webBrowser;

        public MainForm()
        {
            InitializeComponent();
            InitBrowser();

            if (this.webBrowser.Document == null && this.webBrowser.ActiveXInstance == null)
                throw new ApplicationException ("Unable to initialize WebBrowser ActiveX control.");

            var ax = (SHDocVw.WebBrowser)this.webBrowser.ActiveXInstance;
            ax.NewWindow2 += (ref object ppDisp, ref bool Cancel) =>
            {
                var popup = new RawBrowserPopup();
                popup.Visible = true;
                ppDisp = popup.WebBrowser.ActiveXInstance;
            };

            this.Load += (s, e) =>
            {
                this.webBrowser.DocumentText = "<a target=\"_blank\" href=\"javascript:'<button onclick=\\'window.close()\\'>Close</button>'\">Go</a>";
            };
        }

        // create a WebBrowser instance
        void InitBrowser()
        {
            this.webBrowser = new WebBrowser();
            this.webBrowser.Dock = DockStyle.Fill;
            this.Controls.Add(this.webBrowser);
            this.webBrowser.Visible = true;
        }
    }

    // RawWebBrowser

    public class RawWebBrowser : AxHost
    {
        public RawWebBrowser()
            : base("8856f961-340a-11d0-a96b-00c04fd705a2")
        {
        }

        public event EventHandler Initialized;

        protected override void AttachInterfaces()
        {
            if (this.Initialized != null)
                this.Initialized(this, new EventArgs());
        }

        public object ActiveXInstance
        {
            get
            {
                return base.GetOcx();
            }
        }
    }

    // RawBrowserPopup

    public class RawBrowserPopup : Form
    {
        RawWebBrowser webBrowser;

        public RawWebBrowser WebBrowser
        {
            get { return this.webBrowser; }
        }

        public RawBrowserPopup()
        {
            this.webBrowser = new RawWebBrowser();

            this.webBrowser.Initialized += (s, e) =>
            {
                var ax = (SHDocVw.WebBrowser)this.webBrowser.ActiveXInstance;
                ax.NewWindow2 += (ref object ppDisp, ref bool Cancel) =>
                {
                    var popup = new RawBrowserPopup();
                    popup.Visible = true;
                    ppDisp = popup.WebBrowser.ActiveXInstance;
                };

                ax.WindowClosing += (bool IsChildWindow, ref bool Cancel) =>
                {
                    Cancel = true;
                    this.Close();
                };
            };

            this.webBrowser.Dock = DockStyle.Fill;
            this.Controls.Add(this.webBrowser);
            this.webBrowser.Visible = true;
        }
    }
}

VB.NET:

Public Class Form1
    Dim webBrowser As WebBrowser = New WebBrowser()

    Sub New()
        MyBase.New()
        Me.InitializeComponent()
        webBrowser.Dock = DockStyle.Fill
        Me.Controls.Add(webBrowser)
        webBrowser.Visible = True
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.webBrowser.DocumentText = "<a target='_blank' href='javascript:""<button onclick=\""window.close()\"">Close</button>""'>Go</a>"

        Dim ActiveX As SHDocVw.WebBrowser = Me.webBrowser.ActiveXInstance
        AddHandler ActiveX.NewWindow2, AddressOf WebBrowser_ActiveX_NewWindow2
    End Sub

    Private Sub WebBrowser_ActiveX_NewWindow2(ByRef ppDisp As Object, ByRef Cancel As Boolean)
        Dim popup As RawBrowserPopup = New RawBrowserPopup()
        popup.Visible = True
        ppDisp = popup.WebBrowser.ActiveXInstance
    End Sub
End Class

Public Class RawWebBrowser
    Inherits System.Windows.Forms.AxHost

    Sub New()
        MyBase.New("8856f961-340a-11d0-a96b-00c04fd705a2")
    End Sub

    Event Initialized(sender As Object, e As EventArgs)

    Protected Overrides Sub AttachInterfaces()
        RaiseEvent Initialized(Me, New EventArgs())
    End Sub

    Public ReadOnly Property ActiveXInstance() As Object
        Get
            Return MyBase.GetOcx()
        End Get
    End Property
End Class

Public Class RawBrowserPopup
    Inherits System.Windows.Forms.Form

    Dim WithEvents rawBrowser As RawWebBrowser = New RawWebBrowser()

    Sub New()
        MyBase.New()
        rawBrowser.Dock = DockStyle.Fill
        Me.Controls.Add(rawBrowser)
        rawBrowser.Visible = True
    End Sub

    Public ReadOnly Property WebBrowser() As Object
        Get
            Return rawBrowser
        End Get
    End Property

    Private Sub rawBrowser_Initialized(sender As Object, e As EventArgs) Handles rawBrowser.Initialized
        Dim activeX As SHDocVw.WebBrowser = rawBrowser.ActiveXInstance
        AddHandler activeX.NewWindow2, AddressOf activeX_NewWindow2
        AddHandler activeX.WindowClosing, AddressOf activeX_WindowClosing
    End Sub

    Private Sub activeX_NewWindow2(ByRef ppDisp As Object, ByRef Cancel As Boolean)
        Dim popup As RawBrowserPopup = New RawBrowserPopup()
        popup.Visible = True
        ppDisp = popup.WebBrowser.ActiveXInstance
    End Sub

    Private Sub activeX_WindowClosing(IsChildWindow As Boolean, ByRef Cancel As Boolean)
        Cancel = True
        Me.Close()
    End Sub

End Class