C# 发送Post请求（带参数）

此处内容传输都是用UTF-8编码

1.不带参数发送Post请求

      

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/// <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         

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/// <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

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/// <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：

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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);            }