Question

我需要在Web浏览器中加载的本地网页中调用javascript函数在WPF表单中使用线程循环

这是我的C＃代码：

public partial class MainWindow : Window
    {


        Thread myThread;

        public MainWindow()
        {
            InitializeComponent();
            string WebPage = "file:///C:/Users/BARI/Desktop/JSThread/JavaScriptWithThread/JavaScriptWithThread/LocaWebPage.html";
            webBrowser.Navigate(WebPage);

        }

        private void ThreadLoop()
        {
            int i=0;
            while (Thread.CurrentThread.IsAlive)
            {
                Thread.Sleep(1000);
                try
                {
                    Console.WriteLine(i);
                    label.Dispatcher.Invoke(new Action(() => label.Content = i));
                    this.webBrowser.Invoke(new Action(() => this.webBrowser.InvokeScript("thread", i))); //Doesn't work


                }
                catch (InvalidOperationException)
                {
                    Console.WriteLine("Error!");
                }
                i++;
            }
        }

        private void StatrtThread_Button(object sender, RoutedEventArgs e)
        {
            this.webBrowser.InvokeScript("thread", "100"); //This works fine
            myThread = new Thread(new ThreadStart(ThreadLoop));
            myThread.Start();

        }

        private void StopThread_Button(object sender, RoutedEventArgs e)
        {
            myThread.Suspend();
        }
    }

我的Html代码：

<html>
    <head>
    <meta charset="utf-8">
    <title></title>
    </head>
<body onload=start()> 
<script>

function start(){
var t=0;
document.getElementById("valeur").innerHTML = t;
}
var i = 0;
function thread(i){

document.getElementById("valeur").innerHTML = i;
}


</script>

Valeur: <span id="valeur"></span>

</body>
</html>

我在this.webBrowser.Invoke(new Action(() => this.webBrowser.InvokeScript("thread", i)));中遇到错误 WebBrowser不包含Invoke的定义任何其他解决方案??

Answer 1

只需对上面的行中的标签执行相同的操作，请使用Dispatcher。

this.webBrowser.Dispatcher.Invoke(new Action(() => this.webBrowser.InvokeScript("thread", i)));

在Thread Loop中调用JavaScript函数

1 个答案: