在ajax之后更新webBrowser html [英] Update webBrowser html after ajax

问题描述

通过AJAX函数更新后，我需要获取webBrowser的更新html

I need to get the updated html of webBrowser after it gets updated by an AJAX function

例如，我导航至 page1.asp，但导航至 page1 .asp包含一个iframe，该iframe可从另一个页面加载内容。它还具有jQoery功能，可在xx秒后显示提交按钮。

For example, I navigate to "page1.asp", but "page1.asp" includes an iframe that loads content from another page. It also has an jQoery function that display a Submit button after xx seconds.

我的问题是如何从webBrowser获取最新的html？

My question is how can I get the most recent html from webBrowser?

我尝试更新但没有运气，

I tried update but no luck,

webBrowser.Update();

推荐答案

这个问题有点棘手，您需要遵循正确遵循准则以实现您的目标。

Well its a bit tricky question you need to follow the following guidelines correctly in order to achieve your goals.

1. 您需要在表单上创建一个计时器。用刻度线将其绑定，并给出大约500毫秒的间隔。



2. 在timer_tick事件中编写以下代码：

1. you need to create a timer on the form. bind it with tick and give an interval about 500 ms.

2. write this code in the timer_tick event:

如果（browser.ReadyState == WebBrowserReadyState.Complete）

if (browser.ReadyState == WebBrowserReadyState.Complete)

一旦发现就绪状态已完成，那么您将寻找您认为在ajax请求完成后将被更新的html元素。

Once you find the ready state completed then you look for the html element that you think will be updated after completion of ajax request.

您可以通过以下方式检查任何元素：

You could do this way to check any element:

        HtmlElementCollection forms = browser.Document.GetElementsByTagName("form");
        HtmlElement form = null;
        foreach (HtmlElement el in forms)
        {
            string name = el.GetAttribute("name");
            if (name == "DATA")
            {
                form = el;
                break;
            }
        }

4）一旦有了元素，就可以携带

4) Once you have got your element you may carry on your work.

更新：以下是计时器滴答编码，您可以根据自己的需要进行扩展
确保已设置 Timer1.Inverval = 100 （100毫秒）

Update: Here is the timer tick coding that you can extend as per your needs Make sure you have set your Timer1.Inverval = 100 (100 milli seconds)

    private void Timer1_Tick(sender, args) 
    {
        Application.DoEvents();

// make sure your are pulling right element id
        HtmlElement cTag = webBrowser.Document.GetElementById("myelement");         

        if(cTag != null) // if elemnt is found than its fine. 
        { 
            cTag.SetAttribute("value", "Eugene");
            Timer1.Enabled = false;
        } 
        else 
        {
// dont worry, the ajax request is still in progress... just wait on it and move on for the next tick. 
        }
        Application.DoEvents(); // you can call it at the end too.
    }

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