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需要一种方法来捕获WinForm Webbrowser控件中的javascript事件

[英]Need a method to capture javascript events in WinForm webbrowser control

原文 2019-01-11 19:01:15 0 1 javascript/ c#/ .net/ winforms/ webbrowser-control

I have a WinForms app that uses a .NET webbrowser control. 我有一个使用.NET Webbrowser控件的WinForms应用程序。 What I need to do, is wire up an event on the WinForms side to fire when a value is set (via javascript) in the loaded HTML page. 我需要做的是，在加载的HTML页面中设置一个值（通过javascript）时，在WinForms一侧连接一个事件以触发该事件。 I had success doing this with an onclick event of a button, but I can't seem to get it to work with a custom event. 我通过按钮的onclick事件成功完成了此操作，但似乎无法使其与自定义事件一起使用。 I don't know if this is a limitation in what the browser control can attach to event wise. 我不知道这是否限制了浏览器控件可以附加到事件方面。

So essentially, I need that when a JS function is called in the HTML page and sets a value of a hidden input element (or it could be a regular input that I style to be hidden), I need to know that in WinForms. 因此，从本质上讲，我需要在HTML页面中调用JS函数并设置隐藏输入元素的值（或者它可能是我要隐藏的常规输入）时，我需要在WinForms中知道这一点。 If it helps, I am using browser flags in this application to emulate IE11 instead of the default IE9 engine. 如果有帮助，我将在此应用程序中使用浏览器标志来模拟IE11，而不是默认的IE9引擎。 The HTML page loaded is also mine so I can modify it any way needed to make this work properly. 加载的HTML页面也是我的，因此我可以对其进行任何修改以使其正常工作。 I would just use the onclick events of the buttons, but this is a gmaps integration where there can be upwards of 2000 buttons generated (one per marker placed) so it seems like a huge waste of resources to wire up 2000 onclick events when any of those button clicks only modify 4 input fields with the data I care about. 我只使用按钮的onclick事件，但这是一个gmaps集成，其中最多可以生成2000个按钮（每个标记放置一个），因此在以下任何情况下连接2000个onclick事件似乎很浪费资源这些按钮单击只会使用我关心的数据修改4个输入字段。

This project happens to be in VB.NET, but C# solutions would be fine as well. 这个项目恰好在VB.NET中，但是C＃解决方案也可以。 They can be transcoded or if the solution uses C# specific features, we can move this to a separate DLL and reference it. 它们可以被转码，或者如果解决方案使用C＃特定的功能，我们可以将其移至单独的DLL并进行引用。

1 个解决方案

After spending a lot of time on this today, I found a solution. 今天花了很多时间后，我找到了解决方案。 It isn't a direct solution to the problem I posted, but it got me to where I needed to be. 这不是我发布的问题的直接解决方案，但是它使我到达了需要的位置。 I am still interested in an answer to the original problem if anyone has one, but for now, what I found I could do was to create a class in .NET that I could assign to the ScriptingObject of the browser control and then call window.external.myFunctionName, where myFunctionName is a function within the .NET class. 我仍然对如果有人有一个原始问题的答案感兴趣，但是现在，我发现我能做的是在.NET中创建一个类，该类可以分配给浏览器控件的ScriptingObject，然后调用window。 external.myFunctionName，其中myFunctionName是.NET类中的函数。 This works great for my specific problem, but would not work if I didn't also control the HTML page I was consuming with the browser. 这对于我的特定问题非常有用，但是如果我也无法控制浏览器正在使用的HTML页面，那将无法正常工作。 That is why I am still interested in alternate solutions if anyone has one. 这就是为什么我仍然对替代解决方案（如果有人有）感兴趣的原因。 Thanks. 谢谢。