初步完成S7后台服务的改造

DMS.Infrastructure/Interfaces/Services/IS7Service.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using S7.Net;
+
+namespace DMS.Infrastructure.Interfaces.Services
+{
+    /// <summary>
+    /// S7服务接口，定义了与S7 PLC进行通信所需的方法
+    /// </summary>
+    public interface IS7Service
+    {
+        /// <summary>
+        /// 获取当前连接状态
+        /// </summary>
+        bool IsConnected { get; }
+
+        /// <summary>
+        /// 异步连接到S7 PLC
+        /// </summary>
+        /// <returns>表示异步操作的任务</returns>
+        Task ConnectAsync(string ipAddress, int port, short rack, short slot, S7.Net.CpuType cpuType);
+
+        /// <summary>
+        /// 异步断开与S7 PLC的连接
+        /// </summary>
+        /// <returns>表示异步操作的任务</returns>
+        Task DisconnectAsync();
+
+        /// <summary>
+        /// 异步读取单个变量的值
+        /// </summary>
+        /// <param name="address">S7地址</param>
+        /// <returns>表示异步操作的任务，包含读取到的值</returns>
+        Task<object> ReadVariableAsync(string address);
+
+        /// <summary>
+        /// 异步读取多个变量的值
+        /// </summary>
+        /// <param name="addresses">S7地址列表</param>
+        /// <returns>表示异步操作的任务，包含读取到的值字典</returns>
+        Task<Dictionary<string, object>> ReadVariablesAsync(List<string> addresses);
+
+        /// <summary>
+        /// 异步写入单个变量的值
+        /// </summary>
+        /// <param name="address">S7地址</param>
+        /// <param name="value">要写入的值</param>
+        /// <returns>表示异步操作的任务</returns>
+        Task WriteVariableAsync(string address, object value);
+
+        /// <summary>
+        /// 异步写入多个变量的值
+        /// </summary>
+        /// <param name="values">地址和值的字典</param>
+        /// <returns>表示异步操作的任务</returns>
+        Task WriteVariablesAsync(Dictionary<string, object> values);
+    }
+}