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Services/Hncore.Pass.Manage/Service/BaseService.cs

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+using Hncore.Infrastructure.EF;
+using Hncore.Pass.Manage.Configs;
+using Hncore.Pass.Manage.Domain;
+using Hncore.Pass.Manage.Repository;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Options;
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+
+namespace Hncore.Pass.Manage.Service
+{
+    /// <summary>
+    /// 父业务逻辑类
+    /// </summary>
+    ///
+    public abstract class BaseService
+    {
+        /// <summary>
+        /// 配置文件数据承载对象
+        /// </summary>
+        protected readonly AppSettings _appSettings;
+
+        /// <summary>
+        /// EF上下文对象
+        /// </summary>
+        protected readonly EfDbContext _dbCtx;
+
+        /// <summary>
+        /// 数据库连接字符串
+        /// </summary>
+        public string OldDbConString { get { return _appSettings.OldDbConString; } }
+
+        /// <summary>
+        /// 构造函数
+        /// </summary>
+        /// <param name="hca">HTTP上下文访问对象</param>
+        public BaseService(IHttpContextAccessor hca)
+        {
+            this._dbCtx= hca.HttpContext.RequestServices.GetService(typeof(EfDbContext)) as EfDbContext;            
+            //获取当前应用配置信息承载对象
+            var oa=hca.HttpContext.RequestServices.GetService(typeof(IOptionsMonitor<AppSettings>)) as IOptionsMonitor<AppSettings>;
+            this._appSettings = oa.CurrentValue;
+        }
+
+        /// <summary>
+        /// 获取操作员有权操作的项目编码列表(可直接用于EF查询中的Labmda查询条件中)
+        /// </summary>
+        /// <param name="operaterId">操作员数据库ID</param>
+        /// <param name="ownerId">隶属的物业ID</param>
+        /// <returns>有权操作的项目编码列表，没有就返回null</returns>
+        public IQueryable<int> GetManagerProjectCodeList(int operaterId, int ownerId = 0)
+        {
+            if (operaterId <= 0)
+                return null;
+
+            Expression<Func<AuthorityManagerDataDomain, bool>> expression = c => c.DeleteTag == 0 && c.ManagerId == operaterId;
+            if (ownerId > 0)
+            {//如果传递了物业ID，需要动态将物业ID追加到Lambda表达式中去
+                var p1 = expression.Parameters[0];
+                var ownerIdExpression = Expression.PropertyOrField(p1, "OwnerId");
+                var m3 = Expression.Equal(ownerIdExpression, Expression.Constant(ownerId));
+                var body= Expression.And(expression.Body, m3);
+                expression = Expression.Lambda<Func<AuthorityManagerDataDomain, bool>>(body, p1);
+            }
+            IQueryable<int> list = _dbCtx.Set<AuthorityManagerDataDomain>().GetQueryable().Where(expression).Select(c => c.ProjectCode);
+            return list;
+        }
+
+    }
+}