C#发送Post请求，带参数，不带参数，指定参数

 

1.不带参数发送Post请求

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

/// <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

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

/// <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

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

/// <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; }

　　

来源：中国建筑市场网