WCF服务支持HTTP（get，post）方式请求例子

方式一：

    /// <summary>
    /// Http Get请求
    /// </summary>
    /// <param name="url">请求地址</param> 
    /// <param name="postData">请求参数</param> 
    /// <param name="result">返回结果</param>
    /// <returns></returns>
    public static bool WebHttpGet(string url, string postData, out string result)
    {
        try
        {
            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url + (postData == "" ? "" : "?") + postData);
            httpWebRequest.Method = "GET";
            httpWebRequest.ContentType = "text/html;charset=UTF-8";

            WebResponse webResponse = httpWebRequest.GetResponse();
            HttpWebResponse httpWebResponse = (HttpWebResponse)webResponse;
            System.IO.Stream stream = httpWebResponse.GetResponseStream();
            System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, Encoding.GetEncoding("UTF-8"));
            result = streamReader.ReadToEnd(); //请求返回的数据
            streamReader.Close();
            stream.Close();
            return true;
        }
        catch (Exception ex)
        {
            result = ex.Message;
            return false;
        }
    }
            
    /// <summary>
    /// Http Post请求
    /// </summary>
    /// <param name="postUrl">请求地址</param>
    /// <param name="postData">请求参数(json格式请求数据时contentType必须指定为application/json)</param>
    /// <param name="result">返回结果</param>
    /// <returns></returns>
    public static bool WebHttpPost(string postUrl, string postData, out string result, string contentType = "application/x-www-form-urlencoded")
    {
        try
        {
            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(postData);

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(postUrl);
            httpWebRequest.Method = "POST";
            httpWebRequest.ContentType = contentType;
            httpWebRequest.ContentLength = byteArray.Length;

            using (System.IO.Stream stream = httpWebRequest.GetRequestStream())
            {
                stream.Write(byteArray, 0, byteArray.Length); //写入参数                  
            }

            HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse;
            using (System.IO.Stream responseStream = httpWebResponse.GetResponseStream())
            {
                System.IO.StreamReader streamReader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("UTF-8"));
                result = streamReader.ReadToEnd(); //请求返回的数据
                streamReader.Close();
            }
            return true;
        }
        catch (Exception ex)
        {
            result = ex.Message;
            return false;
        }              
    }

方式二： 

    /// <summary>
    /// Http Get请求
    /// </summary>
    /// <param name="url">请求地址</param> 
    /// <param name="postData">请求参数</param> 
    /// <param name="trackId">为防止重复请求实现HTTP幂等性(唯一ID)</param>
    /// <returns></returns>
    public static string SendGet(string url, string postData, string trackId)
    {
        if (string.IsNullOrEmpty(trackId)) return null; //trackId = Guid.NewGuid().ToString("N");
        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url + (postData == "" ? "" : "?") + postData);
        httpWebRequest.Method = "GET";
        httpWebRequest.ContentType = "text/html;charset=UTF-8";
        httpWebRequest.Headers.Add("track_id:" + trackId);

        WebResponse webResponse = httpWebRequest.GetResponse();
        HttpWebResponse httpWebResponse = (HttpWebResponse)webResponse;
        System.IO.Stream stream = httpWebResponse.GetResponseStream();
        System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, Encoding.UTF8);
        string result = streamReader.ReadToEnd(); //请求返回的数据
        streamReader.Close();
        stream.Close();

        return result;
    }

    /// <summary>
    /// Http Post请求
    /// </summary>
    /// <param name="postUrl">请求地址</param>
    /// <param name="postData">请求参数(json格式请求数据时contentType必须指定为application/json)</param>
    /// <param name="trackId">为防止重复请求实现HTTP幂等性(唯一ID)</param>
    /// <returns></returns>
    public static string SendPost(string postUrl, string postData, string trackId, string contentType = "application/x-www-form-urlencoded")
    {
        if (string.IsNullOrEmpty(trackId)) return null; //trackId = Guid.NewGuid().ToString("N");
        byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(postData);

        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(postUrl);
        httpWebRequest.Method = "POST";
        httpWebRequest.ContentType = contentType;
        httpWebRequest.ContentLength = byteArray.Length;
        httpWebRequest.Headers.Add("track_id:" + trackId);

        System.IO.Stream stream = httpWebRequest.GetRequestStream();
        stream.Write(byteArray, 0, byteArray.Length); //写入参数 
        stream.Close();

        HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
        System.IO.StreamReader streamReader = new System.IO.StreamReader(httpWebResponse.GetResponseStream(), Encoding.UTF8);
        string result = streamReader.ReadToEnd(); //请求返回的数据
        streamReader.Close();

        return result;
    }

    /// <summary>
    /// 生成唯一标识符
    /// </summary>
    /// <param name="type">格式：N,D,B,P,X</param>
    /// <returns></returns>
    public static string GetGuid(string type = "")
    {
        //Guid.NewGuid().ToString();    // 9af7f46a-ea52-4aa3-b8c3-9fd484c2af12
        //Guid.NewGuid().ToString("N"); // e0a953c3ee6040eaa9fae2b667060e09 
        //Guid.NewGuid().ToString("D"); // 9af7f46a-ea52-4aa3-b8c3-9fd484c2af12
        //Guid.NewGuid().ToString("B"); // {734fd453-a4f8-4c5d-9c98-3fe2d7079760}
        //Guid.NewGuid().ToString("P"); // (ade24d16-db0f-40af-8794-1e08e2040df3)
        //Guid.NewGuid().ToString("X"); // {0x3fa412e3,0x8356,0x428f,{0xaa,0x34,0xb7,0x40,0xda,0xaf,0x45,0x6f}}
        if (type == "")
            return Guid.NewGuid().ToString();
        else
            return Guid.NewGuid().ToString(type);
    }

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