Internet Explorer中忽略的活动选项卡IE 8的COM对象

问题描述

这是在.net 3.5 winform上运行的Web单点登录代码。代码对ie6或ie8运行良好，只要ie8只有一个标签打开。问题是，如果用户打开一个新的选项卡（标签2,3等）并导航到网站（组织内部的Web表单），以下代码将被执行，但COM自动化对象将返回HTMLDocument对于第一个标签（标签1），即使标签2是活动标签。我在InternetExplorer或HTMLDocument类中找不到任何IE选项卡引用任何地方。实际上，在IE COM自动化文档的任何地方都有很少的IE标签相关文档。

This is web single sign on code that runs on a .net 3.5 winform. The code runs fine for ie6 or ie8 as long as ie8 only has one tab open. The problem is that if the user opens a new tab (tab 2,3,etc.) and navigates to a web site (web form internal in the organization) the below code will be executed but the ie COM automation object will return the HTMLDocument for the first tab (Tab 1) even though tab 2 is the active tab. I can't find any IE tab references in the InternetExplorer or HTMLDocument classes anywhere. Actually, there's very little IE tab related documentation anywherer in the IE COM automation docs.

AutoResetEvent ie2_NavigateCompleteAutoReset;

    /// <summary>
    /// Given the handle of an Internet Explorer instance, this method performs single sign on to
    /// several known web login forms.
    /// </summary>
    /// <param name="iEFramHandle"></param>
    private void WebFormSignOn(int iEFramHandle)
    {
        foreach (SHDocVw.InternetExplorer ie2 in new SHDocVw.ShellWindows())
        {
            if (ie2.HWND == iEFramHandle)
            {
                while (true)
                {
                    Thread.Sleep(100);
                    if (ie2.ReadyState == SHDocVw.tagREADYSTATE.READYSTATE_COMPLETE)
                    {
                        try
                        {
                            mshtml.HTMLDocument doc = (mshtml.HTMLDocument)ie2.Document;
                            ie2.NavigateComplete2 += new SHDocVw.DWebBrowserEvents2_NavigateComplete2EventHandler(ie2_NavigateComplete2);
                            ie2_NavigateCompleteAutoReset = new AutoResetEvent(false);

                            /*Find the username element and enter the user's username*/
                            mshtml.HTMLInputElement userID = (mshtml.HTMLInputElement)doc.all.item("username", 0);
                            userID.value = Globals.Username;

                            /*Find the password element and enter the user's password*/
                            mshtml.HTMLInputElement pwd = (mshtml.HTMLInputElement)doc.all.item("password", 0);
                            pwd.value = Globals.GetAppName();

                            /*Find the submit element/button and click it*/
                            mshtml.HTMLInputElement btnsubmit = (mshtml.HTMLInputElement)doc.all.item("submit", 0);
                            btnsubmit.click();

                            /*Wait up to 5 seconds for the form submit to complete.
                             This is to prevent this method from being called multiple times
                             while waiting for the form submit and subsequent navigation from completing.*/
                            ie2_NavigateCompleteAutoReset.WaitOne(5000);
                            return;
                        }
                        catch (Exception err)
                        {
                            Logger.Log(err.ToString(), Logger.StatusFlag.Error, this.ToString(), "WebFormSignOn");
                            return;
                        }
                        finally
                        {
                            /*Remove the event handler*/
                            ie2.NavigateComplete2 -= ie2_NavigateComplete2;

                        }
                    }
                }
            }
        }
    }

    void ie2_NavigateComplete2(object pDisp, ref object URL)
    {
        ie2_NavigateCompleteAutoReset.Set();
    }

推荐答案

在IE 8有它自己的进程和处理。在原始代码中，我总是从第一个IEFrame获取句柄。我修改了代码（下面），现在它的工作原理。更改是，代替仅查找第一个IEFrame句柄，代码还会查找与调用WebFormsSignOut的方法触发的URL匹配的LocationURL。

It turns out that each tab in IE 8 has it's own process and handle. In the original code i was always getting the handle from the first IEFrame. I modified the code (below) and now it works. The change is that instead of looking for just the first IEFrame handle, the code also looks for a LocationURL that matches the url that triggerd the method that calls WebFormsSignOut.

private void WebFormSignOn(int iEFramHandle,string addressBarText)
{
    var shellWindows = new SHDocVw.ShellWindows();
    foreach (SHDocVw.InternetExplorer ie2 in shellWindows)
    {
        if (ie2.LocationURL==addressBarText)
        { //rest of the code (see orignal post)

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