C# webBrowser操作 javascript

浏览数：24 / 时间：2015年06月09日

using 
System;
using 
System.Windows.Forms;
 
namespace 
Demo
{
    public 
partial 
class 
Form1 : Form
    {
        public 
Form1()
        {
            InitializeComponent();
            webBrowser1.DocumentText = ("<select id=\"pid\" onchange=\"gradeChange()\">" 
+
                                        "<option grade=\"1\" value=\"a\">选项一</a>" 
+
                                        "<option grade=\"2\" value=\"b\">选项二</a>" 
+
                                        "</select>" 
+
                                        "<script type=\"text/javascript\">" 
+
                                        "function gradeChange(){" 
+
                                        "var objS = document.getElementById(\"pid\");" 
+
                                        "var grade = objS.options[objS.selectedIndex].grade;" 
+
                                        "alert(grade);" 
+
                                        "}" 
+
                                        "</script>");
        }
 
        private 
void 
button2_Click(object 
sender, EventArgs e)
        {
            HtmlElementCollection elements = webBrowser1.Document.GetElementById("pid").GetElementsByTagName("option");
            foreach 
(HtmlElement option in 
elements)
            {
                option.SetAttribute("selected", "selected");
                webBrowser1.Document.GetElementById("pid").RaiseEvent("onchange");
                break;
            }
        }
    }
}