调用具有dom访问权限的javascript文件

Question

I have a javascript file that has code with DOM access 我有一个具有DOM访问代码的JavaScript文件

var a=document.getElementById("abc").value

I have html file, that contains all DOM information 我有html文件，其中包含所有DOM信息

<html>...<input id="abc" ...></html>

Is there anyway to get C# invoke the javascript file, and return the value of a , back to the c# program? 反正是有得到C＃调用javascript文件，并且返回的值a ，回C＃程序？

In reality the JavaScript can be much more complex, and I need to channel those "interested values" back to C#, but let's just consider the simple example mentioning here. 实际上，JavaScript可能要复杂得多，我需要将这些“感兴趣的值”传递回C＃，但让我们考虑一下此处提到的简单示例。

Possible directions I could think is using https://jint.codeplex.com/ , or Web browser control. 我认为可能的方向是使用https://jint.codeplex.com/或Web浏览器控件。 The challenge here is that it not only involves the JavaScript, it also involving the HTML file. 这里的挑战在于，它不仅涉及JavaScript，还涉及HTML文件。

What I want to know is: 我想知道的是：

Is there a way to channel variable value from JavaScript back to C#? 有没有一种方法可以将变量值从JavaScript传递回C＃？
How to get JavaScript evaluate DOM elements from a HTML file? 如何让JavaScript评估HTML文件中的DOM元素？

Answer 1

Using WebBrowser and Jint: 使用WebBrowser和Jint：

using (WebBrowser browser = new WebBrowser())
            {
                browser.ScriptErrorsSuppressed = true;
                browser.DocumentText = @"<html><head/><body><input id=""abc"" value=""this is the value in input""></body></html>";
                // Wait for control to load page
                while (browser.ReadyState != WebBrowserReadyState.Complete)
                    Application.DoEvents();
                dynamic d = (dynamic)browser.Document.DomDocument;//get de activex dom
                var jengine = new Jint.Engine();
                jengine.SetValue("document", d);
                try
                {
                    string val=jengine.Execute(@"var a=document.getElementById('abc').value;").GetValue("a").ToString(); 
                    Console.WriteLine(val);
                }
            catch (Jint.Runtime.JavaScriptException je)
            {
                Console.WriteLine(je);
            }
        }

调用具有dom访问权限的javascript文件

问题描述

1 个解决方案

解决方案1
0 2016-03-10 20:22:03

调用具有dom访问权限的javascript文件

问题描述

1 个解决方案

解决方案1 0 2016-03-10 20:22:03

解决方案1
0 2016-03-10 20:22:03