初级的功能

FATrace.HKNetLib/Wrapper/HkCamera.cs

@@ -3,6 +3,7 @@ using FATrace.HKNetLib.Hardware;
 using FATrace.Model;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.IO;
 using static FATrace.HKNetLib.Hardware.CHCNetSDK;
 using System.Threading;
 using System.Threading.Tasks;
@@ -445,15 +446,17 @@ namespace FATrace.HKNetLib.Wrapper
                         {
                             // 发生错误，尝试停止下载并退出
                             Sdk_NET_DVR_StopGetFile();
+                            try { NVRLoadVideoCompleteEventHandler?.Invoke(this, "下载失败"); } catch { }
                             break;
                         }
 
                         try { await Task.Delay(_downloadPollIntervalMs, token); } catch { /* ignore */ }
                     }
                 }
-                catch
+                catch (Exception ex)
                 {
                     // 轮询线程异常吞掉，避免影响上层逻辑
+                    try { NVRLoadVideoCompleteEventHandler?.Invoke(this, $"下载失败:{ex.Message}"); } catch { }
                 }
             }, token);
         }