1：.NET 向 JS程序傳遞數據
可以直接調用InvokeScript函數，在參數中向JS程序傳遞參數。
2:在JS腳本中向WebBrowser傳遞數據。
1：添加一個display:none的控件,比如ID: eventsender
2：需要保證documnet完全load後，在.NET中獲得ID爲eventsender的HTMLElement。使用Timer定時檢測最可靠。
3：添加webbrowser的Navigating事件處理函數：webBrowser1_Navigated
3:JS傳遞數據前，將要傳遞的數據賦值到eventsender的innerHTML
4:JS將window.location.href的地址轉換到其他頁面。
5：在webBrowser1_Navigated中讀取eventsender的內容，可以在innerHTML中構造命令，然後在.NET中解析命令，調用處理函數。
6：設置e.Cancel = true;取消地址跳轉，維持原有頁面。
7：.NET中設置eventsender的innerHTML爲空，避免重複取數據。
完成。
3：當然更簡單的方法可以在Navigating的URL地址中傳遞參數，然後設置e.Cancel = true;這個有一些限制但比較穩定。
代碼：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
namespace GJUI
{
public partial class BrowserBase : UserControl
{
HtmlElement m_Eventer;
public event Action<string> OnJSCommand;
public BrowserBase()
{
InitializeComponent();
}
public void ShowPage(string url)
{
webBrowser1.Navigating -= new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
webBrowser1.Navigating -= new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
webBrowser1.ScrollBarsEnabled = false;
this.webBrowser1.Navigate(url);
Timer aT = new Timer();
aT.Interval = 100;
aT.Start();
aT.Tick += new EventHandler(aT_Tick);
}
void aT_Tick(object sender, EventArgs e)
{
Timer aT = (Timer)sender;
aT.Stop();
m_Eventer = webBrowser1.Document.GetElementById("eventer");
if (m_Eventer == null)
aT.Start();
else
{
webBrowser1.Navigating -= new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
webBrowser1.Navigating -= new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
webBrowser1.Navigating += new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
aT.Dispose();
}
}
protected virtual void CallCommand(string cmd)
{
if(OnJSCommand != null)
OnJSCommand(cmd);
}
void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
e.Cancel = true;
lock (this)
{
string cmd = m_Eventer.InnerHtml;
m_Eventer.InnerHtml = "";
if (string.IsNullOrEmpty(cmd))
return;
CallCommand(cmd);
}
e.Cancel = true;
}
}
}
HTML頁:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title></title>
<meta name='viewport' content='initial-scale=1.0, user-scalable=no' />
<meta http-equiv='content-type' content='text/html; charset=UTF-8' />
<script type="text/javascript" src="http://api.tianditu.com/js/maps.js"></script>
<style type='text/css'>
html,body,table,head
{
margin:0px;
border:0px;
overflow:hidden;
text-align:center;
}
img
{
margin:0px;
padding:0px;
border-width:0px;
}
ul
{
margin:0px;
padding:0px;
list-style-type: none;
}
#main
{
width:100%;
height:100%;
}
#rtflowb
{
position:absolute;
left:auto;
top:30px;
right:10px;
z-index:10000;
background-color:#cdcdcd;
width:180px;
height:300px;
filter:alpha(opacity=80);
-moz-opacity:0.8;
opacity:0.8;
}
#rtflow
{
position:absolute;
left:auto;
top:30px;
right:10px;
z-index:10001;
width:180px;
height:300px;
}
#rtinfo
{
display: block;
padding:0px;
margin:0px;
line-height: 23px;
overflow: hidden;
text-align: left;
}
#rtinfo li
{
height:23px;
overflow: hidden;
display: list-item;
text-decoration: none;
}
#menulink
{
position:absolute;
left:auto;
bottom:10px;
right:10px;
z-index:10005;
display:block;
text-align:right;
}
#menulink img
{
width:40px;
height:40px;
}
#menulink ul
{
list-style-type:none;
position:relative;
height:40px;
line-height:40px;
float:left;
display:none;
}
a#menulink:hover ul
{
display:block;
}
#menulink ul li
{
display:inline;
list-style-type:none;
}
</style>
</head>
<body>
<div id='eventer' style='display:none;'></div>
<div id='main'></div>
<div id='rtflowb'></div>
<div id='rtflow'>
<ul id='rtinfo'>
<li>111號車 人工告警 等待處理</li>
<li>10號車 車門關閉故障 等待處理</li>
<li>第3場站 通訊故障 等待處理</li>
<li>133號車 車輛緩行告警 處理中</li>
</ul>
</div>
<a href='javascript:void(0)' id='menulink'><ul>
<li><span οnclick='sendCMD("verchselect")'>車輛選擇</span></li>
<li><span οnclick='sendCMD("bigparamset")'>參數設置</span></li>
<li><span οnclick='sendCMD("fullscreen")'>全屏切換</span></li>
</ul><img alt='' src='IMG/set.jpg' /></a>
</body>
<script type="text/javascript">
var map = new TMap("main");
map.centerAndZoom(new TLngLat(106.09, 30.80), 15);
map.enableHandleMouseScroll();
</script>
<script src="JS/base.js" type="text/javascript"></script>
</html>JS代碼
//本文檔一定要放在body結束標籤之後
////禁止刷新
//document.onkeydown = function () {
// if (event.keyCode == 116) {
// event.keyCode = 0;
// event.returnValue = false;
// }
//}
document.oncontextmenu = function () {
event.returnValue = false;
}
var eventDom = document.getElementById('eventer');
function sendout() {
window.location.href = 'ErrorFunc.html?' + (new Date()).getTime();
}
function sendCMD(c) {//在<a>標籤內時使用
eventDom.innerHTML = c;
}
function sendOutCMD(c) {//普通JS調用
eventDom.innerHTML = c;
sendout()
}