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一个封装好的Asp.Net C# HttpRequest请求类_c# 怎么写request

作者：盐析白兔 | 2024-03-18 01:19:42

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c# 怎么写request
HTTP请求类：
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View Code 
    
using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.Net;
using  System.IO;
    
namespace  WebRequestAPP
{
     /// <summary>
     /// Http请求
     /// </summary>
     public  class  HttpUtility
     {
         /// <summary>
         ///通用HttpWebRequest
         /// </summary>
         /// <param name="method">请求方式（POST/GET）</param>
         /// <param name="url">请求地址</param>
         /// <param name="param">请求参数</param>
         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
         /// <returns>请求返回的结果</returns>
         public  static  string Request(string method, string url, string param, Action<HttpStatusCode,string> onComplete = null)
         {
             if (string.IsNullOrEmpty(url))
              throw  new  ArgumentNullException( "URL" );
    
             switch  (method.ToUpper())
             { 
                 case  "POST":
                     return  Post(url, param, onComplete);
                 case  "GET":
                     return  Get(url, param, onComplete);
                 default:
                     throw  new  EntryPointNotFoundException( "method:"  + method);
             }
         }
    
         /// <summary>
         /// Post请求
         /// </summary>
         /// <param name="url">请求地址</param>
         /// <param name="param">参数</param>
         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
         /// <returns>请求返回的结果</returns>
         public  static  string Post(string url, string param, Action<HttpStatusCode, string> onComplete = null)
         {
             UrlCheck(ref url);
    
             byte[] bufferBytes = Encoding.UTF8.GetBytes(param);
    
             var request = WebRequest.Create(url) as HttpWebRequest; //HttpWebRequest方法继承自WebRequest, Create方法在WebRequest中定义，因此此处要显示的转换
             request.Method =  "POST" ;
             request.ContentLength = bufferBytes.Length;
             request.ContentType =  "application/x-www-form-urlencoded" ;
    
             try
             {
                 using  (var requestStream = request.GetRequestStream())
                 {
                     requestStream.Write(bufferBytes, 0, bufferBytes.Length);
                 }
             }
             catch  (WebException ex)
             {
    
                 return  ex.Message;
             }
    
             return  HttpRequest(request, onComplete);
         }
    
         /// <summary>
         /// GET请求
         /// </summary>
         /// <param name="url">请求地址</param>
         /// <param name="param">参数</param>
         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
         /// <returns>请求返回结果</returns>
         public  static  string Get(string url, string param, Action<HttpStatusCode, string> onComplete = null)
         {
             UrlCheck(ref url);
    
             if  (!string.IsNullOrEmpty(param))
                 if  (!param.StartsWith( "?" ))
                     param +=  "?"  + param;
                 else
                     param += param;
    
             var request = WebRequest.Create(url) as HttpWebRequest;
             request.Method =  "GET" ;
             request.ContentType =  "application/x-www-form-urlencoded" ;
    
             return  HttpRequest(request, onComplete);
         }
    
         /// <summary>
         /// 请求的主体部分（由此完成请求并返回请求结果）
         /// </summary>
         /// <param name="request">请求的对象</param>
         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
         /// <returns>请求返回结果</returns>
         private  static  string HttpRequest(HttpWebRequest request, Action<HttpStatusCode, string> onComplete = null)
         {
             HttpWebResponse response = null;
    
             try
             {
                 response = request.GetResponse() as HttpWebResponse;
             }
             catch  (WebException ex)
             {
                 response = ex.Response as HttpWebResponse;
             }
    
             if  (response == null)
             {
                 if  (onComplete != null)
                     onComplete(HttpStatusCode.NotFound,  "请求远程返回为空" );
                 return  null;
             }
    
             string result = string.Empty;
             using  (StreamReader reader =  new  StreamReader(response.GetResponseStream()))
             {
                 result = reader.ReadToEnd();
             }
    
             if  (onComplete != null)
                 onComplete(response.StatusCode, result);
    
             return  result;
    
         }
    
         /// <summary>
         /// URL拼写完整性检查
         /// </summary>
         /// <param name="url">待检查的URL</param>
         private  static  void  UrlCheck(ref string url)
         {
             if  (!url.StartsWith( "http://" ) && !url.StartsWith( "https://" ))
                 url= "http://" +url;
         }
     }
}
http://www.dedecms.com/knowledge/program/asp-donet/2012/0803/4214.html
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