一个封装好的Asp.Net C# HttpRequest请求类
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
{
///
/// Http请求
///
public
class
HttpUtility
{
///
///通用HttpWebRequest
///
/// 请求方式（POST/GET）
/// 请求地址
/// 请求参数
/// 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)
///
public
static
string Request(string method, string url, string param, Action
{
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);
}
}
///
/// Post请求
///
/// 请求地址
/// 参数
/// 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)
///
public
static
string Post(string url, string param, Action
{
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);
}
///
/// GET请求
///
/// 请求地址
/// 参数
/// 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)
///
public
static
string Get(string url, string param, Action
{
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);
}
///
/// 请求的主体部分（由此完成请求并返回请求结果）
///
/// 请求的对象
/// 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)
///
private
static
string HttpRequest(HttpWebRequest request, Action
{
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;
}
///
/// URL拼写完整性检查
///
/// 待检查的URL
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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