webBrowser执行js的方法，并返回值，c#后台取值

时间：2022-01-24 06:44:02
      private void Form1_Load(object sender, EventArgs e)

        {

            webBrowser1.Navigate(Application.StartupPath + @"\i.html");

            txtInfo.Text = webBrowser1.DocumentText;

        }
private void button2_Click(object sender, EventArgs e)

        {

            webBrowser1.Document.InvokeScript("GetCode", new object[] { "","","顶一个","D7D796981B62D318"});

            if (webBrowser1.Document.GetElementById("msg") != null)

            {

                HtmlElement element = webBrowser1.Document.GetElementById("msg");

                txtInfo.Text = element.GetAttribute("value");

            }

        }
 function GetCode(lBdId, lDocId, text, sessionID) {

     document.getElementById("msg").value = H2(lBdId + '-' + lDocId + '-' + P(text), 16, sessionID);

}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>

    <head>

        <title></title><script  type="text/javascript" src="i.js"></script>

    </head>

    <body>

    <input type=text id=msg />

    </body>

</html>

以html页面作为媒介，将返回的值传递到html中的控件，然后在webBrowser中用

 HtmlElement element = webBrowser1.Document.GetElementById("msg");

                txtInfo.Text = element.GetAttribute("value")
获得值

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