标签：byte stream bsp sharp span sha 异常 部分 size
C# 用httpWebRequest 执行post请求出现“请求错误,基础连接已经关闭: 连接被意外关闭”，解决方法：
System.Net.HttpWebRequest request;
request.ProtocolVersion = HttpVersion.Version10;
---------------------------------------------------------------
GET方法:
public string DoWebRequest(string url)
{
HttpWebResponse webResponse = null;
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Method = "POST";
string responseStr = null;
webRequest.Timeout = 50000;
webRequest.ContentType = "text/html; charset=gb2312";
try
{
//尝试获得要请求的URL的返回消息
webResponse = (HttpWebResponse)webRequest.GetResponse();
}
catch (WebException e)
{
//发生网络错误时,获取错误响应信息
responseStr = "发生网络错误！请稍后再试";
}
catch (Exception e)
{
//发生异常时把错误信息当作错误信息返回
responseStr = "发生错误：" + e.Message;
}
finally
{
if (webResponse != null)
{
//获得网络响应流
using (StreamReader responseReader = new StreamReader(webResponse.GetResponseStream(), Encoding.GetEncoding("GB2312")))
{
responseStr = responseReader.ReadToEnd();//获得返回流中的内容
}
webResponse.Close();//关闭web响应流
}
}
return responseStr;
}
注意：url中的中文，要先用HttpUtility.UrlEncode("内容",编码) 用服务器接收的编码，编码一下。
POST方法：
private string DoWebRequestByPost(string url, string param)
{
HttpWebResponse webResponse = null;
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
//使用post方式提交
webRequest.Method = "POST";
string responseStr = null;
webRequest.Timeout = 50000;
//要post的字节数组
byte[] postBytes = encoding.GetBytes(param);
webRequest.ContentType = "application/x-www-form-urlencoded;";
webRequest.ContentLength = postBytes.Length;
using (Stream reqStream = webRequest.GetRequestStream())
{
reqStream.Write(postBytes, 0, postBytes.Length);
}
try
{
//尝试获得要请求的URL的返回消息
webResponse = (HttpWebResponse)webRequest.GetResponse();
}
catch (Exception)
{
//出错后直接抛出
throw;
}
finally
{
if (webResponse != null)
{
//获得网络响应流
using (StreamReader responseReader = new StreamReader(webResponse.GetResponseStream(), encoding))
{
responseStr = responseReader.ReadToEnd();//获得返回流中的内容
}
webResponse.Close();//关闭web响应流
}
}
return responseStr;
}
encoding为服务器接收的编码,例如：Encoding.GetEncoding("GBK")等
param post请求的参数 param1=123¶m2=中国¶m3=abc 这样的格式，中文部分不用使用编码，方法内转成byte[]时 会进行编码。
httpWebRequest请求错误,基础连接已经关闭: 连接被意外关闭
标签：byte stream bsp sharp span sha 异常 部分 size
原文地址：http://www.cnblogs.com/25miao/p/6699575.html
