private void button3_Click(object sender, EventArgs e) { //Post() var image = File.ReadAllBytes("D:\\246.png"); // 如果有可选参数 String img64 = System.Convert.ToBase64String(image); String param = "{\"top_num\":5,\"image\":\"" + img64 + "\"}"; String token = "24.14f1f66d780caf1c189a2a6048e4b733.2592000.1531641182.282335-11403414"; string Url = IRDATA_DETECT + "?access_token=" + token; MessageBox.Show(Post(Url, param)); } public string Post(string strURL, string jsonParas) { //创建一个HTTP请求 HttpWebRequest...