如何在WebBrowser中确认脚本错误对话框？

Question

我需要以编程方式确认（即回答“是”＆＃39;）到WebBrowser的脚本错误对话框，否则页面将停止工作。我没有代码可以展示，因为我不知道如何做到这一点。

这是我在谈论的对话框中的图片：

（取自this，顺便说一句）

Answer 1

根据"How to handle script errors as a WebBrowser control host" MSKB文章，您需要在CGID_DocHostCommandHandler主机中处理OLECMDID_SHOWSCRIPTERROR / WebBrowser命令。

通过一些编码，以下是WinForms WebBrowser版本的完成方式，它确实有效：

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public class WebBrowserEx: WebBrowser
    {
        class WebBrowserSiteEx : WebBrowserSite, NativeMethods.IOleCommandTarget
        {
            public WebBrowserSiteEx(WebBrowser browser): base(browser)
            {
            }

            public int QueryStatus(IntPtr pguidCmdGroup, uint cCmds, NativeMethods.OLECMD[] prgCmds, ref NativeMethods.OLECMDTEXT CmdText)
            {
                return NativeMethods.OLECMDERR_E_UNKNOWNGROUP;
            }

            public int Exec(IntPtr pguidCmdGroup, uint nCmdId, uint nCmdExecOpt, IntPtr pvaIn, IntPtr pvaOut)
            {
                if (pguidCmdGroup != IntPtr.Zero)
                {
                    Guid guid = (Guid)Marshal.PtrToStructure(pguidCmdGroup, typeof(Guid));
                    if (guid == NativeMethods.CGID_DocHostCommandHandler)
                    {
                        if (nCmdId == NativeMethods.OLECMDID_SHOWSCRIPTERROR)
                        {
                            // if DOM needed: dynamic document = Marshal.GetObjectForNativeVariant(pvaIn);

                            // continue running scripts
                            if (pvaOut != IntPtr.Zero)
                                Marshal.GetNativeVariantForObject(true, pvaOut); 

                            return NativeMethods.S_OK; 
                        }
                    }
                }
                return NativeMethods.OLECMDERR_E_UNKNOWNGROUP;
            }
        }

        protected override WebBrowserSiteBase CreateWebBrowserSiteBase()
        {
            return new WebBrowserSiteEx(this);
        }
    }

    public partial class Form1 : Form
    {
        WebBrowserEx _browser;
        public Form1()
        {
            InitializeComponent();
            _browser = new WebBrowserEx();
            _browser.Dock = DockStyle.Fill;
            this.Controls.Add(_browser);

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // testing
            _browser.DocumentText = "<script>alert(bad.bad)</script>";
        }
    }

    static class NativeMethods
    {
        [StructLayout(LayoutKind.Sequential)]
        public struct OLECMD
        {
            public uint cmdID;
            public uint cmdf;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct OLECMDTEXT
        {
            public UInt32 cmdtextf;
            public UInt32 cwActual;
            public UInt32 cwBuf;
            public char rgwz;
        }

        public const int OLECMDERR_E_UNKNOWNGROUP = unchecked((int)0x80040102);
        public const int OLECMDID_SHOWSCRIPTERROR = 40;
        public static readonly Guid CGID_DocHostCommandHandler = new Guid("f38bc242-b950-11d1-8918-00c04fc2c836");
        public const int S_OK = 0;

        [ComImport, Guid("b722bccb-4e68-101b-a2bc-00aa00404770"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        public interface IOleCommandTarget
        {
            [PreserveSig]
            int QueryStatus(
                IntPtr pguidCmdGroup,
                UInt32 cCmds,
                [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] OLECMD[] prgCmds,
                ref OLECMDTEXT CmdText);

            [PreserveSig]
            int Exec(
                IntPtr pguidCmdGroup,
                uint nCmdId,
                uint nCmdExecOpt,
                IntPtr pvaIn,
                IntPtr pvaOut);
        }
    }
}

<小时/> 更新了以解决评论：

  

我需要捕获JavaScript错误信息才能记录它   仍未将其显示给用户。我看了一下文档对象   （注释掉的线）并没有看到任何东西。有没有   获取此信息的简便方法？

检查the article我在开头链接了。 errorLine对象上有特殊属性errorCharacter，errorCode，errorMessage，errorUrl，document.parentWindow.event。