C#底层库–网络通信帮助类HTTP

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前言

文将新增一个专栏–底层库，分享编程过程中常用的方法函数。我们将这些常用的方法函数，进行封装，反复测试，形成通用化类库。
方便研发人员，只需要几行代码就可以使用它，解决一些难点问题。
底层库的封装涉及到：数据库操作、加解密算法、日志记录、网络通信、邮件发送、文件操作、参数保存、Excel导入导出等等，持续关注本专栏吧。大家有任何问题，也可以评论区反馈，私信我。

一、底层库介绍

网络访问帮助类，采用HTTP方式访问服务端，包含get、post、put、delete。

二、底层库源码

创建类HttpHelper.cs，复制以下代码

using System;
using System.IO;
using System.Net;
using System.Text;

namespace QRCodeProduce.BLL
{
    public class HttpHelper
    {
        /// 

        /// Get方法
        /// 
        /// ?a_fileName=20220908-2.apk
        /// url
        /// 
        public static string HttpGet(string Url, string a_ParamData)
        {
            try
            {
                byte[] byteArray = Encoding.UTF8.GetBytes(a_ParamData);
                HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(Url);
                webRequest.Method = "GET";
                webRequest.Accept = "application/json, text/javascript, */*";  // 出错就删掉
                webRequest.ContentType = "application/json; charset=utf-8";
                webRequest.ContentLength = byteArray.Length;

                HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    return sr.ReadToEnd(); // 返回的数据
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// 

        /// Post请求
        /// 
        /// 
        /// { "no": "A28A1MW43C"}
        /// 
        public static string HttpPost(string url, string body)
        {
            try
            {
                byte[] byteArray = Encoding.UTF8.GetBytes(body);
                HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
                webRequest.Method = "POST";
                webRequest.Accept = "application/json, text/javascript, */*";
                webRequest.ContentType = "application/json; charset=utf-8";
                webRequest.ContentLength = byteArray.Length;
                webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);

                HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    return sr.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// 

        /// Put请求
        /// 
        /// URL
        /// application/json
        /// 
        public static string HttpPut(string url, string body)
        {
            try
            {
                byte[] byteArray = Encoding.UTF8.GetBytes(body);
                HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
                webRequest.Method = "PUT";
                webRequest.Accept = "application/json, text/javascript, */*";
                webRequest.ContentType = "application/json";
                webRequest.ContentLength = byteArray.Length;
                webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);

                HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    return sr.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// 

        /// Delete请求
        /// 
        /// URL
        /// application/json
        /// 
        public static string HttpDelete(string url, string body)
        {
            try
            {
                byte[] byteArray = Encoding.UTF8.GetBytes(body);
                HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
                webRequest.Method = "DELETE";
                webRequest.Accept = "application/json, text/javascript, */*";
                webRequest.ContentType = "application/json";
                webRequest.ContentLength = byteArray.Length;
                webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);

                HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    return sr.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
    }

}

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三、调用方法

我这里是写了一个button按钮，扫码获得编号，然后点击读取标签，直接可以获得数据。

  private void BTN_Scan_Click(object sender, EventArgs e)
        {
            ScanModel model = new ScanModel
            {
                no = baseDataInput_原料编号.StringValue
            }; 
       
            string l_strYuanLiaoBianhao = JsonConvert.SerializeObject(model);

            string l_strReturn = HttpHelper.HttpPost(string.Format(Const.ct_strScanHSLabel, AppConfig.GetValue("db_server")), l_strYuanLiaoBianhao);

            ActionResult Result = JsonConvert.DeserializeObject<ActionResult>(l_strReturn);

            if (Result.RetInfo.IsSUCD)
            {
                Dictionary<string, string> dicResult = new Dictionary<string, string>();
                dicResult.Clear();

                JObject jo1 = (JObject)JsonConvert.DeserializeObject(Result.Data.Obj.ToString());//JSON反序列化
                foreach (var item in jo1)
                {
                    dicResult.Add(item.Key, item.Value.ToString());
                }

                baseDataInput_原料规格.StringValue = dicResult["黄丝规格"];
                baseDataInput_原料强度.StringValue = dicResult["强度代号"];
                baseDataInput_黄丝厂家.StringValue = dicResult["黄丝厂家"];
                baseDataInput_黄丝代码.StringValue = dicResult["黄丝代码"];
                baseDataInput_doff.StringValue = dicResult["doff"];
            }
            else
            {
                XtraMessageBox.Show(Result.RetInfo.ErrorCode + ":" + Result.RetInfo.ErrorMsg,
                 "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
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数据结构ScanModel.cs

    public class ScanModel
    {
        public string no { get; set; }
    }
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四、运行效果

PC连接扫码枪，扫描一维码、二维码标签，自动复制“原料编号”，点击“读标”按钮自动获取标签信息。