20220313 3张表格 导出excel功能

20220313_Excel/TempTask.WebEntry/Tools/HttpHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TempTask.WebEntry.Tools
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public class HttpHelper
+    {
+
+        /// <summary>
+        /// 请求网页地址
+        /// </summary>
+        /// <param name="url">网页地址</param>
+        /// <param name="method"></param>
+        /// <param name="param">参数</param>
+        /// <returns></returns>
+        public static string CallUrl(string url, string method, string param)
+        {
+            //创建一个HTTP请求  
+            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
+            //Post请求方式  
+            request.Method = method;
+            //内容类型
+            request.ContentType = "application/json";
+
+            //byte[] bs = Encoding.ASCII.GetBytes(param);    //参数转化为ascii码
+            byte[] bs = Encoding.UTF8.GetBytes(param);
+            request.ContentLength = bs.Length;
+            using (Stream reqStream = request.GetRequestStream())
+            {
+                reqStream.Write(bs, 0, bs.Length);
+            }
+
+            String strValue = "";//strValue为http响应所返回的字符流
+            HttpWebResponse response;
+            try
+            {
+                //获得响应流
+                response = (HttpWebResponse)request.GetResponse();
+            }
+            catch (WebException ex)
+            {
+                response = ex.Response as HttpWebResponse;
+            }
+            using Stream s = response.GetResponseStream();
+            using StreamReader sr = new StreamReader(s);
+            strValue = sr.ReadToEnd();
+            return strValue;
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="url"></param>
+        /// <returns></returns>
+        public static string CallUrl(string url)
+        {
+            WebClient webClient = new WebClient();
+            return webClient.DownloadString(url);
+        }
+    }
+}