http链接中请求进行编码，Http请求

 如果参数中含有特殊字符&,则强制URL编码<br>

  http协议中参数的传输是"key=value"这种简直对形式的，如果要传多个参数就需要用“&”符号对键值对进行分割。如"?name1=value1&name2=value2"，这样在服务端在收到这种字符串的时候，会用“&”分割出每一个参数，然后再用“=”来分割出参数值，
  在计算机中使用用ASCII码表示

  如果我的参数值中就包含=或&这种特殊字符的时候该怎么办。
  比如说“name1=value1”,其中value1的值是“va&lu=e1”字符串，那么实际在传输过程中就会变成这样“name1=va&lu=e1”。我们的本意是就只有一个键值对，但是服务端会解析成两个键值对，这样就产生了歧义。

  URL编码只是简单的在特殊字符的各个字节前加上%，例如，我们对上述会产生奇异的字符进行URL编码后结果：“name1=va%26lu%3D”，这样服务端会把紧跟在“%”后的字节当成普通的字节，就是不会把它当成各个参数或键值对的分隔符。

第一种方法：
第一步：获取在Web.config中配置要请求的地址
string url = System.Web.Configuration.WebConfigurationManager.AppSettings["url"];
第二步：把字符串编码（编码详解）
string allStr = System.Web.HttpUtility.UrlEncode(str, System.Text.Encoding.UTF8) ;
第三步：把参数转成byte 
 byte[] bufferB = Encoding.UTF8.GetBytes(allStr);
第四步：构建HttpWebRequest，并发送
System.Net.ServicePointManager.DefaultConnectionLimit = ;
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(url);
WebReq.Method = "POST";
WebReq.ContentType = "application/x-www-form-urlencoded";
WebReq.ContentLength = allStr.Length;
Stream PostData = WebReq.GetRequestStream();
PostData.Write(bufferB, , bufferB.Length);
PostData.Close();
第五步：接收返回结果（解析返回的JSON）
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
StreamReader sr = new StreamReader(WebResp.GetResponseStream(), System.Text.Encoding.UTF8);
string backstr = sr.ReadToEnd();
backstr = HttpUtility.UrlDecode(backstr);
Console.WriteLine(WebResp.StatusCode);
Console.WriteLine(WebResp.Server);
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
Console.WriteLine(_Answer.ReadToEnd());
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作者：容妞
来源：CSDN
原文：https://blog.csdn.net/lijingrong_ljr/article/details/53214729
版权声明：本文为博主原创文章，转载请附上博文链接！

string url = "http://16.8.3.91:8089/api/query/Bicycle?deviceno=1&operator=2&sign=9fe789d7a5629a59ed56d7a256dc5a1a&cardno=0310";//http需要传递的参数与地址
            WebRequest wRequest = WebRequest.Create(url);
            wRequest.Method = "GET";
            wRequest.ContentType = "text/html;charset=UTF-8";
            WebResponse wResponse = wRequest.GetResponse();
            Stream stream = wResponse.GetResponseStream();
            StreamReader reader = new StreamReader(stream, System.Text.Encoding.UTF8);
            string str = reader.ReadToEnd();   //url返回的值
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作者：叫我梧桐树
来源：CSDN
原文：https://blog.csdn.net/u012732371/article/details/58587092
版权声明：本文为博主原创文章，转载请附上博文链接！

                        M1001 m1001 = new M1001()
                        {
                            Head = baseHead,
                            Body = body
                        };                       

                        string serviceUrl = "https://jq.asus.com.cn/omsec/v1.0/ECOrder/PutOrder?appid=t0a2YlbyD5JL&token=LLfDDlwHuifVnP2BNngCdebuj4DtYXtAD6QAKEHaA4cDMUniKkKnNJwnuQlL";
                        Encoding encoding = Encoding.UTF8;
                        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrl);
                        request.Method = "POST";
                        request.Accept = "text/html, application/xhtml+xml, */*";
                        request.ContentType = "application/json";
                        byte[] buffer = encoding.GetBytes(JsonConvert.SerializeObject(m1001));
                        request.ContentLength = buffer.Length;
                        request.GetRequestStream().Write(buffer, 0, buffer.Length);
                        HttpWebResponse res = (HttpWebResponse)request.GetResponse();
                        using (StreamReader reader = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
                        {
                            string Result = reader.ReadToEnd();
                        }

异步async

                        string json = JsonConvert.SerializeObject(m1001);
                        string appid = System.Configuration.ConfigurationManager.AppSettings["appid"];
                        string token = System.Configuration.ConfigurationManager.AppSettings["token"];
                        string serviceUrl = "https://xxxxxx?appid=" + appid + "&token=" + token + "";

                        HttpContent JSONContents = new StringContent(JsonConvert.SerializeObject(m1001), Encoding.UTF8, "application/json");

                        HttpClient _httpClient = new HttpClient();
                        var Msg = await _httpClient.PostAsync(serviceUrl, JSONContents);
                        if (Msg.IsSuccessStatusCode)
                        {
                            string Ret = "";
                            var s = Msg.Content.ReadAsStringAsync();
                            JObject objs = JObject.Parse(s.Result);
                            Root baseroot = JsonConvert.DeserializeObject<Root>(s.Result);
                            if (string.IsNullOrEmpty(baseroot.head.errorCode))
                            {//写入成功
                                Ret = baseroot.body.CreateDateTime.ToString();
                            }
                            else
                            {//写入失败
                                Ret = baseroot.head.transMessage.ToString();//发邮件还是怎么的
                            }
                        }

 

// 使用C# 5.0中提供的async 和await关键字来定义异步方法
        // 从代码中可以看出C#5.0 中定义异步方法就像定义同步方法一样简单。
        // 使用async 和await定义异步方法不会创建新线程,
        // 它运行在现有线程上执行多个任务.
        // 此时不知道大家有没有一个疑问的？在现有线程上(即UI线程上)运行一个耗时的操作时，
        // 为什么不会堵塞UI线程的呢？
        // 这个问题的答案就是 当编译器看到await关键字时，线程会
        private async Task<long> AccessWebAsync()
        {
            MemoryStream content = new MemoryStream();

            // 对MSDN发起一个Web请求
            HttpWebRequest webRequest = WebRequest.Create("http://msdn.microsoft.com/zh-cn/") as HttpWebRequest;
            if (webRequest != null)
            {
                // 返回回复结果
                using (WebResponse response = await webRequest.GetResponseAsync())
                {
                    using (Stream responseStream = response.GetResponseStream())
                    {
                        await responseStream.CopyToAsync(content);
                    }
                }
            }

            txbAsynMethodID.Text = Thread.CurrentThread.ManagedThreadId.ToString() ;
            return content.Length;
        }

                        string CustomerPO = j["Success"]["items"]["item"][i]["out_tid"].ToString();
                        string storage_name = com.Switch_ShipTo(j["Success"]["items"]["item"][i]["storage_id"].ToString());//   要做个仓库编码匹配仓库名称的设置
                        string tid_item = j["Success"]["items"]["item"][i]["tid_item"].ToString();//明细
                        string pro_totalfee = j["Success"]["items"]["item"][i]["pro_totalfee"].ToString();//产品总金额

                        JArray jArray = JArray.Parse(tid_item);
                        JArray arr = new JArray();
                        for (int q = 0; q < jArray.Count; q++)
                        {
                            JObject obj = new JObject();
                            JObject jdata = (JObject)jArray[q];
                            obj["linenum"] = jdata["pro_detail_code"];
                            obj["sku"] = jdata["product_no"].ToString();//
                            obj["originalsku"] = jdata["product_no"].ToString();//先在ebd里查询不到
                            obj["qty"] = jdata["pro_num"].ToString(); //edbProductGet(jdata["product_no"].ToString());
                            obj["inventoryname"] = com.Switch_ShipTo(jdata["storage_id"].ToString());
                            obj["price"] = com.Change(Convert.ToDouble(pro_totalfee) / jArray.Count, 2);
                            arr.Add(obj);
                        }

                        var data = new JObject
                                {
                                    {"Head",new JObject
                                        {
                                            {"TransCode","X1002" },
                                            {"TransId",com.GenerateTransId(18)}
                                        }
                                    },
                                    { "Body", new JObject
                                        {
                                            {"orderno", orderno },
                                            {"CustomerPO", CustomerPO},
                                            {"ordertypecode", "Direct" },
                                            {"billto",  _Setting.Value.JD_billto.ToString() },//账款店铺是不是要写为定值
                                            {"shipto", storage_name},//还有就是shipto，目前是8个仓，但是从e店宝获取的只是storage_id，是要把对应的仓库名称写在配置里，还是只传id值
                                            {"workid", _Setting.Value.JD_workid.ToString()}, //workid
                                            {"detail", arr }
                                        }
                                    }
                                 };

                        string appid = _Setting.Value.Gettoken_appid;//这个是要替换成正式的appid(有了)
                        var httpClient = new HttpClient();
                        string serviceUrl = "https://xxxcn:9007/api/v1.0/Order/PutStandard?appid=" + appid + "&token=" + com.GetNewToken() + "";//这个是写入京东的url
                        HttpContent JSONContents = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");

                        var message = await httpClient.PostAsync(serviceUrl, JSONContents);
                        if (message.IsSuccessStatusCode)
                        {
                            string rr = await message.Content.ReadAsStringAsync();
                            JObject objs = JObject.Parse(rr);
                            string errorCode = objs["head"]["errorCode"].ToString();
                            if (string.IsNullOrEmpty(errorCode))
                            {//写入成功
                            }
                            else
                            {//写入失败
                                com.JD_Error("订单：" + orderno + ",写入StageHead表失败：" + objs["head"]["transMessage"].ToString());
                            }
                        }

                        //using (var resss = await httpClient.PostAsync(serviceUrl, JSONContents))
                        //{
                        //    if (resss.IsSuccessStatusCode)
                        //    {
                        //        string ser = $"{resss.Content.ReadAsStringAsync().Result}";
                        //        JObject objs = JObject.Parse(ser);
                        //        string errorCode = objs["head"]["errorCode"].ToString();
                        //        if (string.IsNullOrEmpty(errorCode))
                        //        {//写入成功
                        //        }
                        //        else
                        //        {//写入失败
                        //            com.JD_Error("订单：" + orderno + ",写入StageHead表失败：" + objs["head"]["transMessage"].ToString());
                        //        }

                        //    }
                        //}

　　

                          //string appid = _Setting.Value.Gettoken_appid;//这个是要替换成正式的appid(有了)
                         //string serviceUrl = "https://xxxx.com.cn:9007/api/v1.0/Order/PutStandard?appid=" + appid + "&token=" + com.GetNewToken() + "";//                         //Encoding encoding = Encoding.UTF8;
                         //HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrl);
                         //request.Method = "POST";
                         //request.Accept = "text/html, application/xhtml+xml, */*";
                         //request.ContentType = "application/json";
                         //byte[] buffer = encoding.GetBytes(JsonConvert.SerializeObject(data));
                         //request.ContentLength = buffer.Length;
                         //request.GetRequestStream().Write(buffer, 0, buffer.Length);
                         //HttpWebResponse res = (HttpWebResponse)request.GetResponse();
                         //using (StreamReader reader = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
                         //{
                         //    string Result = reader.ReadToEnd();
                         //    JObject objs = JObject.Parse(Result);
                         //    string errorCode = objs["head"]["errorCode"].ToString();
                         //    if (string.IsNullOrEmpty(errorCode))
                         //    {//写入成功
                         //    }
                         //    else
                         //    {//写入失败
                         //        com.JD_Error("订单：" + orderno + ",写入StageHead表失败：" + objs["head"]["transMessage"].ToString());
                         //    }
                         //}