C#发送Get、Post请求(带参数)
作者：天马3798
本文主要介绍了C#发送Get、Post请求，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
Get请求
1.简单发送Get请求
/// <summary>
/// 指定Url地址使用Get 方式获取全部字符串
/// </summary>
/// <param name="url">请求链接地址</param>
/// <returns></returns>
public static string Get(string url)
{
string result = "";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
try
{
//获取内容
using (StreamReader reader = new StreamReader(stream))
{
result = reader.ReadToEnd();
}
}
finally
{
stream.Close();
}
return result;
}
2.带请求参数的Get方法
/// <summary>
/// 发送Get请求
/// </summary>
/// <param name="url">地址</param>
/// <param name="dic">请求参数定义</param>
/// <returns></returns>
public static string Get(string url, Dictionary<string, string> dic)
{
string result = "";
StringBuilder builder = new StringBuilder();
builder.Append(url);
if (dic.Count > 0)
{
builder.Append("?");
int i = 0;
foreach (var item in dic)
{
if (i > 0)
builder.Append("&");
builder.AppendFormat("{0}={1}", item.Key, item.Value);
i++;
}
}
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(builder.ToString());
//添加参数
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
try
{
//获取内容
using (StreamReader reader = new StreamReader(stream))
{
result = reader.ReadToEnd();
}
}
finally
{
stream.Close();
}
return result;
}
3.自定义指定Http请求头，自定义指定编码解析返回结果
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "GET";
req.Headers["Accept-Language"] = "zh-CN,zh;q=0.8";
req.Referer = "https://www.baidu.com/";
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
string result = "";
//注意，此处使用的编码是：gb2312
//using (StreamReader reader = new StreamReader(stream, Encoding.Default))
using (StreamReader reader = new StreamReader(stream, Encoding.GetEncoding("gb2312")))
{
result = reader.ReadToEnd();
}
Post请求
此处内容传输都是用UTF-8编码
1.不带参数发送Post请求
/// <summary>
/// 指定Post地址使用Get 方式获取全部字符串
/// </summary>
/// <param name="url">请求后台地址</param>
/// <returns></returns>
public static string Post(string url)
{
string result = "";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
//获取内容
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
result = reader.ReadToEnd();
}
return result;
}
2.带参数Post请求,指定键值对
/// <summary>
/// 指定Post地址使用Get 方式获取全部字符串
/// </summary>
/// <param name="url">请求后台地址</param>
/// <returns></returns>
public static string Post(string url,Dictionary<string,string> dic)
{
string result = "";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
#region 添加Post 参数
StringBuilder builder = new StringBuilder();
int i = 0;
foreach (var item in dic)
{
if (i > 0)
builder.Append("&");
builder.AppendFormat("{0}={1}", item.Key, item.Value);
i++;
}
byte[] data = Encoding.UTF8.GetBytes(builder.ToString());
req.ContentLength = data.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(data, 0, data.Length);
reqStream.Close();
}
#endregion
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
//获取响应内容
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
result = reader.ReadToEnd();
}
return result;
}
3.带参数的Post请求，指定发送字符串内容
/// <summary>
/// 指定Post地址使用Get 方式获取全部字符串
/// </summary>
/// <param name="url">请求后台地址</param>
/// <param name="content">Post提交数据内容(utf-8编码的)</param>
/// <returns></returns>
public static string Post(string url, string content)
{
string result = "";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
#region 添加Post 参数
byte[] data = Encoding.UTF8.GetBytes(content);
req.ContentLength = data.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(data, 0, data.Length);
reqStream.Close();
}
#endregion
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Stream stream = resp.GetResponseStream();
//获取响应内容
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
result = reader.ReadToEnd();
}
return result;
}
转载方法：
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://fanyi.baidu.com/transcontent");
Encoding encoding = Encoding.UTF8;
string param = "ie=utf-8&source=txt&query=hello&t=1327829764203&token=8a7dcbacb3ed72cad9f3fb079809a127&from=auto&to=auto";
//encoding.GetBytes(postData);
byte[] bs = Encoding.ASCII.GetBytes(param);
string responseData = String.Empty;
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bs.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
reqStream.Close();
}
using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())
{
using (StreamReader reader = new StreamReader(response.GetResponseStream(),encoding))
{
responseData = reader.ReadToEnd().ToString();
}
context.Response.Write(responseData);
}
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