JSON資料交換(文字、圖片)，使用Newtonsoft.Json.dll

2012-10-09

操作畫面

備註：

圖片會先轉換成Base64

PHP JSON資料交換，請參考

程式碼

        //顯示資料/JSON

        private void button1_Click(object sender, EventArgs e)

            dataGridView1.DataSource = null;

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://localhost/xuan/wsLine.php");

            request.Method = "GET";

            request.Timeout = 5000;

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Stream reciveStream = response.GetResponseStream();

            StreamReader readStream = new StreamReader(reciveStream, Encoding.UTF8);

            String jsonString = readStream.ReadToEnd().Trim();

            List<iMessage> messages = (List<iMessage>)JsonConvert.DeserializeObject(jsonString, typeof(List<iMessage>));

            dataGridView1.DataSource = messages;

            response.Close();

       //寫入資料/JSON

        private void btnSubmit_Click(object sender, EventArgs e)

            String urlString = String.Format("http://locahost/xuan/wsLine.php?action=insert&dirId={0}",txtName.Text);

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(urlString);

            request.Method = "POST";

            String json = JsonConvert.SerializeObject(this.messages);

            using (var streamWriter = new StreamWriter(request.GetRequestStream()))

                streamWriter.Write(json);

            var httpResponse = (HttpWebResponse)request.GetResponse();

            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

                var responseText = streamReader.ReadToEnd();

                Console.Write(responseText);

                //Now you have your response.

                //or false depending on information in the response

            httpResponse.Close();

            this.Close();

   //圖片<－>Base64

    class Utilis

        public static string ImageToBase64(String imageFilePath, System.Drawing.Imaging.ImageFormat format)

            using (MemoryStream ms = new MemoryStream())

                Image image = Image.FromFile(imageFilePath);

                // Convert Image to byte[]

                image.Save(ms, format);

                byte[] imageBytes = ms.ToArray();

                // Convert byte[] to Base64 String

                string base64String = Convert.ToBase64String(imageBytes);

                return base64String;

        public static Image Base64ToImage(string base64String)

            // Convert Base64 String to byte[]

            byte[] imageBytes = Convert.FromBase64String(base64String);

            MemoryStream ms = new MemoryStream(imageBytes, 0,

              imageBytes.Length);

            // Convert byte[] to Image

            ms.Write(imageBytes, 0, imageBytes.Length);

            Image image = Image.FromStream(ms, true);

            return image;