C#基础网络请求
get请求
/// 发送get请求得到响应内容
///
/// url前缀
/// 请求路径url
/// 请求参数键值对
/// 响应字符串
public String requestHttpGet(String url, String param)
{
String responseContent = “”;
HttpWebResponse httpWebResponse = null;
StreamReader streamReader = null;
try
{
if (param != null && !param.Equals(“”))
{
url = url + “?” + param;
}
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Method = “GET”;
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
streamReader = new StreamReader(httpWebResponse.GetResponseStream());
if (streamReader == null)
{
return “”;
}
responseContent = streamReader.ReadToEnd();
if (responseContent == null || responseContent.Equals(“”) || responseContent.Equals(“534”))
{
return “”;
}
}
catch (WebException e)
{
return “”;
//throw e;
}
finally
{
if (httpWebResponse != null)
{
httpWebResponse.Close();
}
if (streamReader != null)
{
streamReader.Close();
}
}
return responseContent;
}
**
POST请求
**
/// 发送post请求得到响应内容
///
/// url前缀
/// 请求路径url
/// 请求数据键值对
/// 响应字符串
public String requestHttpPost(String url, Dictionary<String, String> paras)
{
String responseContent = “”;
HttpWebResponse httpWebResponse = null;
StreamReader streamReader = null;
try
{ //组装访问路径
//根据url创建HttpWebRequest对象
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
//设置请求方式和头信息
httpWebRequest.Method = “POST”;
httpWebRequest.ContentType = “application/x-www-form-urlencoded”;
//遍历参数集合
if (!(paras == null || paras.Count == 0))
{
StringBuilder buffer = new StringBuilder();
int i = 0;
foreach (string key in paras.Keys)
{
if (i > 0)
{
buffer.AppendFormat(“&{0}={1}”, key, paras[key]);
}
else
{
buffer.AppendFormat(“{0}={1}”, key, paras[key]);
}
i++;
}
byte[] btBodys = Encoding.UTF8.GetBytes(buffer.ToString());
httpWebRequest.ContentLength = btBodys.Length;
//将请求内容封装在请求体中
httpWebRequest.GetRequestStream().Write(btBodys, 0, btBodys.Length);
}
//获取响应
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
//得到响应流
streamReader = new StreamReader(httpWebResponse.GetResponseStream());
//读取响应内容
responseContent = streamReader.ReadToEnd();
//关闭资源
httpWebResponse.Close();
streamReader.Close();
//返回结果
if (responseContent == null || responseContent.Equals(“”) || responseContent.Equals(“534”))
{
return “”;
}
}
catch (WebException e)
{
return “”;
}
finally
{
if (httpWebResponse != null)
{
httpWebResponse.Close();
}
if (streamReader != null)
{
streamReader.Close();
}
}
return responseContent;
}
}
}