添加项目文件。

Constant/CSConstant.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ShanghaiEnvironmentalTechnology
+{
+    public static class CSConstant
+    {
+        public static string DbConnectionString = "Data Source=FlowPressure.db;Version=3;";
+    }
+
+    /// <summary>
+    /// 排气流表映射
+    /// </summary>
+    public class FlowPressureRecord
+    {
+        public int Id { get; set; }
+        public double Flow { get; set; }
+        public double Pressure { get; set; }
+
+        public double BeginCO2 { get; set; }
+        public double EndCO2 { get; set; }
+        public double CO2Added { get; set; }
+
+        public DateTime RecordTime { get; set; }
+    }
+}

Constant/PLCDevice.cs

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+using Modbus.Device;
+using Modbus;
+using System.Net.Sockets;
+
+namespace ShanghaiEnvironmentalTechnology
+{
+    public class PLCDevice
+    {
+       
+    }
+}