修复删除设备时的错误

DMS.Application/Interfaces/IEventService.cs

@@ -23,6 +23,18 @@ public interface IEventService
     /// <param name="e">设备状态改变事件参数</param>
     void RaiseDeviceActiveChanged(object sender, DeviceActiveChangedEventArgs e);
 
+    /// <summary>
+    /// 设备添加事件
+    /// </summary>
+    event EventHandler<DeviceChangedEventArgs> OnDeviceChanged;
+
+    /// <summary>
+    /// 触发设备添加事件
+    /// </summary>
+    /// <param name="sender">事件发送者</param>
+    /// <param name="e">设备变更事件参数</param>
+    void RaiseDeviceChanged(object sender, DeviceChangedEventArgs e);
+
     #endregion
 
     #region 变量事件