处理Web浏览器控件的单击事件

Question

我想添加webBrowser控件的click事件.这是我的代码.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        HtmlDocument htmlDoc; 
        public Form1()
        {
            InitializeComponent();
            OpenFileDialog open = new OpenFileDialog();
            open.ShowDialog();
            this.webBrowser1.Navigate(open.FileName);

        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            if (webBrowser1.Document != null)
            {
                htmlDoc = webBrowser1.Document;
                htmlDoc.Click += new HtmlElementEventHandler(htmlDoc_Click);
            }
        }
        private void htmlDoc_Click(object sender, HtmlElementEventArgs e)
        {
            MessageBox.Show("Click");
        }

    }
}

我希望它能够显示一个.ppt文件.可以显示但是当我点击webBrowser时,没有显示消息框.还有其他解决方案吗？谢谢

Answer 1

我正在ObjectForScripting做这些事情.它允许JavaScript调用C#-Method.让JavaScript对事件做出反应,这样更容易,而且你不需要MSHTML.这里很好地解释 了.您需要using System.Runtime.InteropServices;它才能工作,以便应用程序知道ComVisible-Annotation.

您不必是JavaScript-pro就可以使用它.例如:只需添加如下按钮:

<button onclick="javascript:window.external.showPpt('test.ppt');">Click me</button>

这将调用showPpt在ObjectForScripting.中命名的方法.请记住:您也可以使用C#创建HTML.这样您就可以在文档中存储信息.这是一个完整的例子:

public partial class frmBrowser : Form
{
    HtmlDocument doc;

    [ComVisible(true)]
    public class ScriptManager
    {
        private frmBrowser mForm;

        public ScriptManager(frmBrowser form)
        {
             mForm = form;
        }

        public void recall(string statusID)
        {
             mForm.RestoreStatus(statusID);
        }
    }

    public frmBrowser()
    {
        InitializeComponent();
        this.webBrowser.ObjectForScripting = new ScriptManager(this);
        string url = "file:///" + Application.StartupPath + "\\start\\start.html";
        this.webBrowser.Navigate(url);
    }

    private void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {
        doc = webBrowser.Document;
        showRecent();
    }

    private void showRecent()
    {
        HtmlElement divRecent = doc.GetElementById("recent_cont");
        List<DaoStatus> status = Center.DB.GetUIStatus();
        string html = "";
        foreach (DaoStatus st in status)
        {
             html += "<button onclick=\"javascript:window.external.recall('" + st.ID + "');\">" + st.Name + "</button>";
        }
        divRecent.InnerHtml = html;
    }
}

该webBrowser控制导航到一个本地文件.如果showRecent()调用满载,则从数据库获取信息并使用id为"recent_cont"的div-Element相应地创建按钮.