在MVC学习系列继续之前，这里先插一篇——HttpWebRequest模拟浏览器的GET、POST请求。利用get 获取某一个电影，然后用POST修改。在这之前先将之前创建的MVC项目发布，如下图：

在模拟请求之前，我们先用Fiddler检测一下GET请求：

现在我们创建一个窗体应用程序，然后利用HttpWebRequest 按照上图中的HTTP头部信息模拟 GET请求，下面是代码：

private void LoadPre()
        {
            string url = "http://192.168.1.104/Movies/Edit/5";
            HttpWebRequest request = null;
            request = WebRequest.Create(url) as HttpWebRequest;
            request.Accept = "text/html, application/xhtml+xml, image/jxr, */*";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586";
            request.Method = "GET";
            request.Host = "192.168.1.104";
            request.KeepAlive = true;
            request.Referer = "http://192.168.1.104/";
            request.Headers.Add("Accept-Encoding", "gzip, deflate");
            request.Headers.Add("Accept-Language", "zh-CN");
            //如果没有 下面这行代码 将获取不到相应的Cookie （response.Cookies）
            //其实 不添加这行代码对于获取 数据没有影响，但是过后的POST操作会用到相应的Cookie
            request.CookieContainer = new CookieContainer();
            //以下两行对于获取Cookie 对于本次测试 没有影响
            //CookieCollection cc = new CookieCollection();
            //request.CookieContainer.Add(cc);
            try
            {
                //响应
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                int statusInt = response.StatusCode.GetHashCode();
                //相应成功
                if (response.StatusCode.ToString().ToLower() == "ok")
                {
                    string strtUrl = response.ResponseUri.AbsoluteUri;
                    GV_CookieCollection = response.Cookies;
                    string responseText = null;
                    if (response.ContentEncoding.ToLower() == "gzip")
                    {
                        responseText = HttpUtility.HtmlDecode(new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress), Encoding.UTF8).ReadToEnd());
                    }
                    else if (response.CharacterSet.ToLower() == "utf-8")
                    {
                        responseText = new StreamReader(response.GetResponseStream(), Encoding.UTF8).ReadToEnd();
                    }
                    else
                    {
                        responseText = new StreamReader(response.GetResponseStream(), Encoding.Default).ReadToEnd();
                    }
                    if (!string.IsNullOrEmpty(responseText))
                    {
                        webBrowser1.DocumentText = responseText;
                        //以下通过 正则表达式 查到隐藏域 name='__RequestVerificationToken'
                        //为稍后的POST请求使用
                        string patternRegion = "<\s*input\s*.*name\s*=\s*"__RequestVerificationToken"\s*.*value\s*=\s*"(?<value>[\w-]{108,108})"\s*/>";
                        RegexOptions regexOptions = RegexOptions.Singleline | RegexOptions.IgnoreCase | RegexOptions.Compiled;
                        Regex reg = new Regex(patternRegion, regexOptions);
                        MatchCollection mc = reg.Matches(responseText);
                        foreach (Match m in mc)
                        {
                            hidRequestVerificationToken = m.Groups["value"].Value;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

很容易发现，获取的页面和点击页面中“编辑”获取的页面一样。哈哈，因为我们就是模拟他吗？

下面我们看一下Fiddler检测修改时的截图：

下面我们就模拟上面的POST请求，上代码：

private void btnModify_Click(object sender, EventArgs e)
        {
            string url = "http://192.168.1.104/Movies/Edit/5";
            HttpWebRequest request = null;
            request = WebRequest.Create(url) as HttpWebRequest;
            request.Accept = "text/html, application/xhtml+xml, image/jxr, *";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586";
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Host = "192.168.1.104";
            request.KeepAlive = true;
            request.Headers.Add("Pragma", "no-cache");
            request.Headers.Add("Accept-Encoding", "gzip, deflate");
            request.Headers.Add("Accept-Language", "zh-CN");
            //没有下面两行代码  请求得不到相应  会出现错误提示：远程服务器返回错误: (500) 内部服务器错误。
            request.CookieContainer = new CookieContainer();
            request.CookieContainer.Add(GV_CookieCollection);
            StringBuilder sb = new StringBuilder();
            //__RequestVerificationToken  参数中没有它也是不行的，你可以试试 
            sb.Append("__RequestVerificationToken=");
            sb.Append(hidRequestVerificationToken);
            sb.Append("&ID=5");
            sb.Append("&Title=速度与激情4");
            sb.Append("&ReleaseDate=2009-04-03");
            sb.Append("&Genre=动作");
            sb.Append("&Price=45.5");
            byte[] b = new UTF8Encoding().GetBytes(sb.ToString());
            request.ContentLength = b.Length;
            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(b, 0, b.Length);
            }
            try
            {
                //响应
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                int statusInt = response.StatusCode.GetHashCode();
                //相应成功
                if (response.StatusCode.ToString() == "OK")
                {
                    string responseUri = response.ResponseUri.AbsoluteUri;
                    MessageBox.Show("修改成功！");
                    LoadPre();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

点击上图中的【确定】按钮如下图：

接下来我们在刷新一下列表页面，如下图：

看一下代码结构，如下图：

每次还得留意Cookie，挺麻烦的，不知道有没有好方法！听说HttpClient不错。哈哈！这篇就写到这里了！谢谢！