如何调用脚本MSHTML工作 [英] How to invoke scripts work in msHTML

问题描述

我使用axWebBrowser，我需要做一个脚本的工作时，列表框选择的项目更改它的工作原理。

I'm using axWebBrowser and I need to make a script work which works when selected item of a listbox is changed.

在默认web浏览器控制存在的方法等;

In default webBrowser control there is a method like;

WebBrowserEx1.Document.InvokeScript("script")

但在axWebBrowser我不能工作的任何脚本！而且也没有这个控制文件。

But in axWebBrowser I can not work any script! And there is no documentation about this control.

有谁知道怎么样？

推荐答案

一个迟到的答案，但希望仍然可以帮助别人。有许多方法使用web浏览器的ActiveX控件时调用的脚本。相同的技术也可以用的WinForms版本web浏览器控件的使用（通过 webBrowser.HtmlDocument.DomDocument ）和WPF的版本（通过的 webBrowser.Document ）：

A late answer, but hopefully still may help someone. There is a number of ways to invoke a script when using WebBrowser ActiveX control. The same techniques can also be used with WinForms version of WebBrowser control (via webBrowser.HtmlDocument.DomDocument) and with WPF version (via webBrowser.Document):

void CallScript(SHDocVw.WebBrowser axWebBrowser)
{
    //
    // Using C# dynamics, which maps to COM's IDispatch::GetIDsOfNames, 
    // IDispatch::Invoke
    //

    dynamic htmlDocument = axWebBrowser.Document;
    dynamic htmlWindow = htmlDocument.parentWindow;
    // make sure the web page has at least one <script> tag for eval to work
    htmlDocument.body.appendChild(htmlDocument.createElement("script"));

    // can call any DOM window method
    htmlWindow.alert("hello from web page!");

    // call a global JavaScript function, e.g.:
    // <script>function TestFunc(arg) { alert(arg); }</script>
    htmlWindow.TestFunc("Hello again!");

    // call any JavaScript via "eval"
    var result = (bool)htmlWindow.eval("(function() { return confirm('Continue?'); })()");
    MessageBox.Show(result.ToString());

    //
    // Using .NET reflection:
    //

    object htmlWindowObject = GetProperty(axWebBrowser.Document, "parentWindow");

    // call a global JavaScript function
    InvokeScript(htmlWindowObject, "TestFunc", "Hello again!");

    // call any JavaScript via "eval"
    result = (bool)InvokeScript(htmlWindowObject, "eval", "(function() { return confirm('Continue?'); })()");
    MessageBox.Show(result.ToString());
}

static object GetProperty(object callee, string property)
{
    return callee.GetType().InvokeMember(property,
        BindingFlags.Instance | BindingFlags.GetProperty | BindingFlags.Public,
        null, callee, new Object[] { });
}

static object InvokeScript(object callee, string method, params object[] args)
{
    return callee.GetType().InvokeMember(method,
        BindingFlags.Instance | BindingFlags.InvokeMethod | BindingFlags.Public,
        null, callee, args);
}

必须有至少一个＆LT;脚本＆GT; 标记JavaScript的评估来工作，这可注入如上所示。

There has to be at least one <script> tag for JavaScript's eval to work, which can be injected as shown above.

另外，JavaScript引擎可以异步初始化的东西，如 webBrowser.Document.InvokeScript（SetTimer的，新的[] {window.external.notifyScript（），1}）或 webBrowser.Navigate（JavaScript的：（window.external.notifyScript（），空（0）））。

Alternatively, JavaScript engine can be initialized asynchronously with something like webBrowser.Document.InvokeScript("setTimer", new[] { "window.external.notifyScript()", "1" }) or webBrowser.Navigate("javascript:(window.external.notifyScript(), void(0))").

这篇关于如何调用脚本MSHTML工作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！