C#在C/S端把图片通过Json或者fromdata的格式上传到服务器接口

首先是Fromdata格式的上传服务器 

注：可以使用PostMan工具进行接口测试  详情自百度。

以下是Fromdata格式上传服务器代码

           //根据按钮打开一个图片 第一步
           if (open.ShowDialog() == DialogResult.OK)
            {
                this.textBox1.Text = open.FileName;
                pictureBox1.ImageLocation = this.textBox1.Text;
                pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
            }


 　　　　/// <summary>
        /// 使用 POST 方式提交中文数据  使用Uri地址、Token、发送方式默认Form、对应的接口数据...... 第二步
        /// </summary>
        public void SendPostData(string Url)
        {
            // POST 方式通过在页面内容中填写参数的方法来完成数据的提交。由于提交的参数中可以说明使用的编码方式，所以理论上能获得更大的兼容性。
            byte[]  fileContent1 = File.ReadAllBytes(pictureBox1.ImageLocation);
           
            Encoding myEncoding = Encoding.GetEncoding("gb2312"); //确定用哪种编码方式
            //对应的接口数据以及值有多少写多少
            string param = HttpUtility.UrlEncode("strFile", myEncoding) + "=" + HttpUtility.UrlEncode(pictureBox1.ImageLocation, myEncoding) + "&" +
                          HttpUtility.UrlEncode("appId", myEncoding) + "=" + HttpUtility.UrlEncode("1400495610", myEncoding) + "&" +
                          HttpUtility.UrlEncode("programeId", myEncoding) + "=" + HttpUtility.UrlEncode("165", myEncoding) + "&" +
                          HttpUtility.UrlEncode("suffix", myEncoding) + "=" + HttpUtility.UrlEncode(".jpg", myEncoding) + "&" +
                          HttpUtility.UrlEncode("roomId", myEncoding) + "=" + HttpUtility.UrlEncode("713", myEncoding);
            //string jsonStr = @"{""roomId"":3, ""programeId"":""135"", ""appId"":""123"", ""suffix"":""jpg"", ""strFile"":""C:UsersLenovoPictures联想锁屏壁纸8482111.jpg""}";

            
            byte[] paramBytes = Encoding.ASCII.GetBytes(param); //参数转化为 ASCII 码
           

            HttpWebRequest httpWebRequest = WebRequest.Create(Url) as HttpWebRequest;
            httpWebRequest.Method = "POST";
            httpWebRequest.ContentType = "application/json;charset=gb2312";
            httpWebRequest.ContentLength = paramBytes.Length;
            httpWebRequest.Headers.Add("token", "token值.....");

            using (Stream reqStream = httpWebRequest.GetRequestStream())
            {
                reqStream.Write(paramBytes, 0, paramBytes.Length);
            }

            HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse; // 获取响应
            if (httpWebResponse != null)
            {
                using (StreamReader sr = new StreamReader(httpWebResponse.GetResponseStream()))
                {
                    string content = sr.ReadToEnd();
                }

                httpWebResponse.Close();
            }
        }

以下是Json格式上传  

//打开选择一个Image图片
 private void button3_Click(object sender, EventArgs e)
        {
            if (open.ShowDialog() == DialogResult.OK)
            {
                this.textBox1.Text = open.FileName;
                byte[] name = SaveImage(open.FileName);
                ImgPath = Convert.ToBase64String(name);
                pictureBox1.ImageLocation = this.textBox1.Text;
                pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
            }
        }

//上传到服务器的上 根据一个地址和一个实体类对应着接口的所需的数据
  public void SendData(string url,Model.Body model)
        {
            //Model.Data modelresult = new Model.Data();
           
            var param = Newtonsoft.Json.JsonConvert.SerializeObject(model);
            WebClient wc = new WebClient();
            wc.Headers.Add("Content-Type", "application/json");
            wc.Headers.Add("token", "07A4262F562EC8915F862F91AF268FE6");
            var bs = wc.UploadData(url, System.Text.Encoding.UTF8.GetBytes(param));
            
            var rtn = System.Text.Encoding.UTF8.GetString(bs);
            var result = Newtonsoft.Json.JsonConvert.DeserializeObject<Model.Data>(rtn);
            MessageBox.Show(result.data);
            DownPath = result.data;
        }
//调用时就这样
 private void button1_Click(object sender, EventArgs e)
        {
            var model = new Model.Body() { roomId = "713", programeId = "165", appId = "1400495610", suffix = ".jpg", strFile = ImgPath };
            SendData("接口地址",model);
        }
//实体类
 public class Body
    {
        public string roomId { get; set; }
        public string programeId { get; set; }
        public string appId { get; set; }
        public string suffix { get; set; }
        public string strFile { get; set; }
    }
   
    class Data
    {
        public string data { get; set; }
        public int status { get; set; }
        public string msg { get; set; }
    }

根据data里面返回的地址下载

 public void DownLoad(string DownPath)
        {
            if (DownPath != null)
            {
                WebRequest imgRequest = WebRequest.Create(DownPath);

                HttpWebResponse res;
                try
                {
                    res = (HttpWebResponse)imgRequest.GetResponse();
                }
                catch (WebException ex)
                {

                    res = (HttpWebResponse)ex.Response;
                }

                if (res.StatusCode.ToString() == "OK")
                {
                    System.Drawing.Image downImage = System.Drawing.Image.FromStream(imgRequest.GetResponse().GetResponseStream());

                    string deerory = string.Format(@"D:img{0}", DateTime.Now.ToString("yyyy-MM-dd"));

                    string fileName = string.Format("{0}.jpg", DateTime.Now.ToString("HHmmssffff"));


                    if (!System.IO.Directory.Exists(deerory))
                    {
                        System.IO.Directory.CreateDirectory(deerory);
                    }
                    downImage.Save(deerory + fileName);
                    downImage.Dispose();
                }
            }
            else
            {
                MessageBox.Show("该路径为空");
            }
        }

.