WebBrowser 跨域之间访问的方法

    项目需要，本地静态页访问远程页面，然后远程页面反过来调用本地页面。这样在浏览器中是不可以实现的，只有 ie 5 调低了安全级别才可以。在一个 winform 程序中，可以用 webbrowser来实现。

 

    

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

namespace SetLocalPath
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //string href = string.Empty;

        private void button1_Click(object sender, EventArgs e)
        {
            //HtmlElement middlecenter = webBrowser1.Document.All["smile"];
            //middlecenter.SetAttribute("src", "e:\\pdm.jpg");

            
            //webBrowser1.Document.Links[0].SetAttribute("href", "F:\\TestWebSite\\index.html");
        }

        void link_Click(object sender, HtmlElementEventArgs e)
        {
            HtmlElement archor = (HtmlElement)sender;
            string url = archor.GetAttribute("href");

            string fileType = url.Substring(url.LastIndexOf('.') + 1);

            if (fileType == "html" || fileType == "htm")
            {
               url = url.Replace("//", "\\");
            }
            
            webBrowser1.Navigate(url);
        }

        private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
            string url = e.Url.ToString();

            if (lastNavigate != url && !isFirstTime && url.IndexOf("javascript") == -1)
            {
                lastNavigate = url;
                url = System.Web.HttpUtility.UrlDecode(url, Encoding.GetEncoding("utf-8")); // 转一次编码，将 %3 转为 ?
                string fileType = url.Substring(url.LastIndexOf('.') + 1);

                if (fileType.IndexOf('?') > -1)
                {
                    fileType = fileType.Substring(0, fileType.IndexOf('?'));
                }

                if (fileType == "html" || fileType == "htm")
                {

                    //url = ConfigurationManager.AppSettings["localfile"].ToString() + "\\" + url.Substring(url.LastIndexOf('\\') + 1);
                    if (url.StartsWith("http"))
                    {
                        url = ConfigurationManager.AppSettings["localfile"].ToString().TrimEnd(new char[] { '\\', '/' }) + "\\" +
                            url.Replace(ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/", "");
                    }
                    else
                    {
                        url = url.Replace("file:///", "").Replace("/", "\\");
                    }
                    //url = url.Replace("/", "\\");
                }
                else if (fileType == "aspx")
                {
                    if (url.StartsWith("file"))
                    {
                        url = ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/" +
                            url.Replace("file:///", "").Replace(ConfigurationManager.AppSettings["localfile"].ToString().Replace('\\', '/').TrimEnd(new char[] { '\\', '/' }) + "/", "");
                    }
                    else
                    {
                        url = System.Text.RegularExpressions.Regex.Replace(url,
                            "http://([^.]+)/", ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/");

                    }
                    lastNavigate = url;
                    //url = ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/" + currPage.Replace(ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }), "");
                }

                //lastNavigate = url;
                this.webBrowser1.Navigate(url);

            }

            // 尝试
            currPage = e.Url.ToString();

            if (isFirstTime)
            {
                lastNavigate = url;
                isFirstTime = false;
            }
        }

        private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
        {
            //this.webBrowser1.Navigate("F:\\TestWebSite\\index.html");
            //string url = e.Url.ToString();
            //string fileType = url.Substring(url.LastIndexOf('.') + 1);


            //if (fileType == "html" || fileType == "htm")
            //{
            //    this.webBrowser1.Navigate(url);
            //}
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {


        }

        private void webBrowser1_DocumentCompleted_1(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            foreach (HtmlElement archor in this.webBrowser1.Document.Links)
            {
                archor.SetAttribute("target", "_self");
                //archor.Click += new HtmlElementEventHandler(link_Click);
            }

            foreach (HtmlElement form in this.webBrowser1.Document.Forms)
            {
                form.SetAttribute("target", "_self");
            }

            //HtmlElement link = webBrowser1.Document.All["linktest"];
            //href = link.GetAttribute("href");
            //link.Click += new HtmlElementEventHandler(link_Click);
        }

        string lastNavigate = string.Empty;
        string prepre = string.Empty;
        string currPage = string.Empty;
        bool isFirstTime = true;


        private void webBrowser1_Navigated_1(object sender, WebBrowserNavigatedEventArgs e)
        {
            string url = e.Url.ToString();
            
            if (currPage != url && !isFirstTime)
            {
                url = System.Web.HttpUtility.UrlDecode(url, Encoding.GetEncoding("utf-8")); // 转一次编码，将 %3 转为 ?
                string fileType = url.Substring(url.LastIndexOf('.') + 1);

                if (fileType.IndexOf('?') > -1)
                {
                    fileType = fileType.Substring(0, fileType.IndexOf('?'));
                }

                if (fileType == "html" || fileType == "htm")
                {

                    if (url.StartsWith("http"))
                    {
                        url = ConfigurationManager.AppSettings["localfile"].ToString().TrimEnd(new char[] { '\\', '/' }) + "\\" +
                            url.Replace(ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }), "");
                    }
                    else
                    {
                        url = url.Replace("file:///", "").Replace("/", "\\");
                    }
                }
                else if (fileType == "aspx")
                {
                    if (url.StartsWith("file"))
                    {
                        url = ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/" +
                            url.Replace("file:///", "").Replace(ConfigurationManager.AppSettings["localfile"].ToString().Replace('\\', '/').TrimEnd(new char[] { '\\', '/' }) + "/", "");
                    }
                    else
                    {
                        url = System.Text.RegularExpressions.Regex.Replace(url,
                            "http://([^.]+)/", ConfigurationManager.AppSettings["remote"].ToString().TrimEnd(new char[] { '\\', '/' }) + "/");

                    }

                }
                lastNavigate = url;
                this.webBrowser1.Navigate(url);

            }


            if (isFirstTime)
            {
                lastNavigate = url;
                isFirstTime = false;
            }

             //应该是跳转的页面，而不是 当前的
        }

    }
}