C#發送Post請求，帶參數，不帶參數，指定參數

 

1.不帶參數發送Post請求

        /// <summary>
        /// 指定Post地址使用Get 方式獲取全部字符串
        /// </summary>
        /// <param name="url">請求后台地址</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();
            //獲取內容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }

2.帶參數Post請求,指定鍵值對

        /// <summary>
        /// 指定Post地址使用Get 方式獲取全部字符串
        /// </summary>
        /// <param name="url">請求后台地址</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 參數
            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();
            //獲取響應內容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }

　　

3.帶參數的Post請求，指定發送字符串內容

/// <summary>
/// 指定Post地址使用Get 方式獲取全部字符串
/// </summary>
/// <param name="url">請求后台地址</param>
/// <param name="content">Post提交數據內容(utf-8編碼的)</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 參數
    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();
    //獲取響應內容
    using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
    {
        result = reader.ReadToEnd();
    }
    return result;
}