diff --git a/HKCardOUT/ViewModels/RootViewModel.cs b/HKCardOUT/ViewModels/RootViewModel.cs
index 7113e97..3c324c1 100644
--- a/HKCardOUT/ViewModels/RootViewModel.cs
+++ b/HKCardOUT/ViewModels/RootViewModel.cs
@@ -79,16 +79,21 @@ namespace HKCardOUT.ViewModels
                     {
                         if (UHF_RS485_Helper.GetInstance().GetSerialPortState())
                         {
-                            DataBus.StoreInfo.Devices.ForEach(item =>
+                            if (DataBus.StoreInfo != null)
                             {
-                                var res = UHF_RS485_Helper.GetInstance().ReadCard(item.Address.AsInt());
-
-                                if (res != null)
+                                DataBus.StoreInfo.Devices.ForEach(item =>
                                 {
-                                    if (!res.ResData.IsMatch(new Regex("0{20}")))
-                                        ReadFunc?.Invoke(res);
-                                }
-                            });
+                                    var res = UHF_RS485_Helper.GetInstance().ReadCard(item.Address.AsInt());
+
+                                    if (res != null)
+                                    {
+                                        if (!res.ResData.IsMatch(new Regex("0{20}")))
+                                            ReadFunc?.Invoke(res);
+                                    }
+                                });
+                            }
+                            else 
+                                HandyControl.Controls.Growl.InfoGlobal("系统已离线,请连接网络,并重启程序!");
                         }
 
                         Thread.Sleep(10);
@@ -112,42 +117,6 @@ namespace HKCardOUT.ViewModels
             }), "打开串口");
 
         }
-        /// <summary>
-        /// 读取信息
-        /// </summary>
-        public void GetData()
-        {
-            //开启循环监听数据
-            timer1.Interval = 500;
-            timer1.Elapsed += (o, a) =>
-            {
-                if (!UHF_RS485_Helper.GetInstance().GetSerialPortState())
-                {
-                    HandyControl.Controls.Growl.InfoGlobal("串口打开失败");
-                    timer1.Stop();
-                    return;
-                }
-                else
-                {
-                    if (DataBus.NetWordState)
-                    {
-                        DataBus.StoreInfo.Devices.ForEach(item =>
-                        {
-                            var res = UHF_RS485_Helper.GetInstance().ReadCard(item.Address.AsInt());
-
-                            if (res != null)
-                            {
-                                if (!res.ResData.IsMatch(new Regex("0{20}")))
-                                    ReadFunc?.Invoke(res);
-                            }
-                        });
-                    }
-                    else
-                        HandyControl.Controls.Growl.InfoGlobal("系统已离线,请连接网络,并重启程序!");
-                }
-            };
-            timer1.Start();
-        }
         protected override void OnViewLoaded()
         {
             //广告初始化