实现抓图

Windows/CS/Framework4.0/XCamera/Test/Form1.cs

@@ -5,6 +5,7 @@ using System.Data;
 using System.Drawing;
 using System.IO;
 using System.Linq;
+using System.Net;
 using System.Text;
 using System.Threading;
 using System.Windows.Forms;
@@ -778,5 +779,100 @@ namespace Test
             txtLog.AppendText($"[{timestamp}] {message}" + Environment.NewLine);
             txtLog.ScrollToCaret();
         }
+
+        /// <summary>
+        /// 10. ONVIF抓图测试
+        /// </summary>
+        private void btnTestOnvifSnapshot_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                LogMessage("正在测试ONVIF抓图...");
+                
+                var imageStream = GetSnapshot();
+                if (imageStream != null)
+                {
+                    // 显示捕获的图像
+                    using (var image = System.Drawing.Image.FromStream(imageStream))
+                    {
+                        // 清理之前的图像
+                        if (LedImage.Image != null)
+                        {
+                            var oldImage = LedImage.Image;
+                            LedImage.Image = null;
+                            oldImage.Dispose();
+                        }
+                        
+                        LedImage.Image = (System.Drawing.Image)image.Clone();
+                        LedImage.SizeMode = PictureBoxSizeMode.Zoom;
+                        LogMessage("ONVIF抓图成功！");
+                    }
+                }
+                else
+                {
+                    LogMessage("ONVIF抓图失败: 无法获取图像流");
+                }
+            }
+            catch (Exception ex)
+            {
+                LogMessage($"ONVIF抓图错误: {ex.Message}");
+            }
+        }
+
+        /// <summary>
+        /// 使用ONVIF协议获取快照
+        /// </summary>
+        public System.IO.Stream GetSnapshot()
+        {
+            var request = (HttpWebRequest)WebRequest.Create("http://192.168.100.10:8899/cgi-bin/snapshot.cgi");
+            request.Method = "POST";
+            request.ContentType = "application/json";
+            request.Timeout = 10000; // 10秒超时
+            request.ReadWriteTimeout = 10000;
+            
+            // 添加认证信息
+            string username = "admin";
+            string password = "";
+            string credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes($"{username}:{password}"));
+            request.Headers["Authorization"] = $"Basic {credentials}";
+            
+            // 发送JSON格式的POST数据
+            string postData = "{\"action\": \"snapshot\"}";
+            byte[] data = Encoding.UTF8.GetBytes(postData);
+            request.ContentLength = data.Length;
+            
+            using (var stream = request.GetRequestStream())
+            {
+                stream.Write(data, 0, data.Length);
+            }
+            
+            // 发送请求
+            var response = (HttpWebResponse)request.GetResponse();
+            if (response.StatusCode == HttpStatusCode.OK)
+            {
+                // 检查响应内容类型
+                string contentType = response.ContentType;
+                if (contentType.StartsWith("image/"))
+                {
+                    // 返回图片二进制流
+                    return response.GetResponseStream();
+                }
+                else
+                {
+                    // 读取JSON错误信息
+                    using (var reader = new StreamReader(response.GetResponseStream()))
+                    {
+                        string errorMessage = reader.ReadToEnd();
+                        response.Close();
+                        throw new Exception($"ONVIF抓图失败: {errorMessage}");
+                    }
+                }
+            }
+            else
+            {
+                response.Close();
+                throw new Exception($"ONVIF抓图失败，状态码: {response.StatusCode}");
+            }
+        }
     }
 }