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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; } } }} |
原文：http://www.cnblogs.com/lonelyxmas/p/3517281.html