JSON利用Newtonsoft.Json.dll交换文字及图片_H5之家 - 中国HTML5教程资源分享第一站

备注：

图片会先转换成Base64

程序代码

//显示数据/JSON private void button1_Click(object sender, EventArgs e) { dataGridView1.DataSource = null; HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(""); 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(); } //写入资料/JSON private void btnSubmit_Click(object sender, EventArgs e) { String urlString = String.Format("?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(); } //图片<－>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; } }

Tag标签： JSON Newtonsoft.Json.dll

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