如何通过WebBrowser控件为WinForms处理javascript事件 [英] How to handle javascript events via WebBrowser control for WinForms

问题描述

我已阅读来自.Net的WebBrowser控件 - 如何注入Javascript ，是否可能从c＃winforms 和其他许多人调用Javascript方法。这些示例是返回函数值或警报窗口（同步调用）。我必须从事件处理程序（asyn调用）获得结果：

I have read WebBrowser Control from .Net — How to Inject Javascript, Is it possible to call Javascript method from c# winforms and many others. Those examples were returns function value or alert window (synchronous calls). I have to get result from event handler (asyn call):

<script type="text/javascript">
        window.onload = function() {
            var o = new M.Build(document.getElementById("ZID"));

            M.Events.observe(o, o.Events.Success, function() {
                // I have to get some value!!
            });

            M.Events.observe(o, o.Events.Fault, function() {
                // I have to get some value!!
            });
        }
    </script>

推荐答案

从JavaScript调用C＃

Calling C# from JavaScript

简单地说，你可以向WebBrowser公开一个C＃对象
，即JavaScript
可以直接调用WebBrowser
类公开一个属于
ObjectForScripting的属性，可以通过
设置你的应用程序，并成为
JavaScript中的
window.external对象。该对象必须具有
ComVisibleAttribute设置为true

Simply put, you can expose a C# object to the WebBrowser that the JavaScript can call directly The WebBrowser class exposes a property called ObjectForScripting that can be set by your application and becomes the window.external object within JavaScript. The object must have the ComVisibleAttribute set true

C＃：

 [System.Runtime.InteropServices.ComVisibleAttribute(true)]
    public class ScriptInterface
    {
        public void callMe()
        {
            … // Do something interesting
        }
    }

    webBrowser1.ObjectForScripting = new ScriptInterface();

Javascript：

Javascript:

window.external.callMe();

从C＃调用WebBrowser控件中的JavaScript

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