面向接口开发的一个架构（三）

业务逻辑层

一、IBusinessFacade：定义业务逻辑接口

IBusinessBase.cs

IBusinessBase
 1namespace IBusinessFacade
 2{
 3    public interface IBusinessBase
 4    {
 5        void Init(string type);
 6        DataSet Get();
 7        DataSet Get(int id);
 8        void Add(DataSet ds);
 9        void Add(string[] temp);
10        void Delete(int id);
11        void Update(DataSet ds);
12    }
13}

 

ILog.cs

1namespace IBusinessFacade
2{
3    public interface ILog : IBusinessBase
4    {
5        
6    }
7}

 

二、BusinessLogic：业务实现层

1、BaseBuiness.cs

IBusinessBase
  1namespace BusinessLogic
  2{
  3    public class BaseBusiness : IBusinessBase
  4    {
  5        public string BusinessType = string.Empty;
  6
  7        private Assembly assembly;
  8        private Object obj;
  9        private const string FAILED_LOAD_ASSEMBLY = "Can't load assembly.";
 10        private const string FAILED_CREATE_CLASS = "Can't create class";
 11        private const string FAILED_ACCESS_STR = "Failed access DAL. return null value.please checked BusinessType or make sure DataAccess assembly in your application folder.";
 12
 13        public BaseBusiness()
 14        {
 15            assembly = null;
 16            obj = null;
 17        }
 18
 19        public BaseBusiness(string businessType)
 20        {
 21            Init(businessType);
 22        }
 23
 24        IBusinessBase Members#region IBusinessBase Members
 25
 26        public void Init(string businessType)
 27        {
 28            if (string.IsNullOrEmpty(businessType))
 29            {
 30                throw new Exception("BusinessType should not be empty!");
 31            }
 32            BusinessType = businessType;
 33            assembly = Assembly.Load("DataAccess");
 34            if (assembly == null)
 35            {
 36                throw new Exception(FAILED_LOAD_ASSEMBLY);
 37            }
 38            BusinessType = string.Format("DataAccess.{0}DA",businessType);
 39            obj = assembly.CreateInstance(BusinessType);
 40            if (obj == null)
 41            {
 42                throw new Exception(FAILED_CREATE_CLASS);
 43            }
 44        }
 45
 46        public DataSet Get()
 47        {
 48            MethodInfo getMethod = assembly.GetType(BusinessType).GetMethod("Get",new Type[]{});
 49            Object ret = getMethod.Invoke(obj,null);
 50            if (ret == null)
 51            {
 52                throw new Exception(FAILED_ACCESS_STR);
 53            }
 54            DataSet ds = (DataSet)ret;
 55            return ds;
 56        }
 57
 58        public System.Data.DataSet Get(int id)
 59        {
 60            MethodInfo getMethod = assembly.GetType(BusinessType).GetMethod("Get",new Type[]{typeof(int)});
 61            Object ret = getMethod.Invoke(obj, new object[]{id});
 62            if (ret == null)
 63            {
 64                throw new Exception(FAILED_ACCESS_STR);
 65            }
 66            DataSet ds = (DataSet)ret;
 67            return ds;
 68        }
 69
 70        public void Add(DataSet ds)
 71        {
 72            MethodInfo getMethod = assembly.GetType(BusinessType).GetMethod("Add");
 73            Object ret = getMethod.Invoke(obj, new object[]{ds});
 74            if (ret == null)
 75            {
 76                throw new Exception(FAILED_ACCESS_STR);
 77            }
 78            int result = (int)ret;
 79            if (result == 0)
 80            {
 81                throw new Exception("no record has effected");
 82            }
 83        }
 84
 85        public void Delete(int id)
 86        {
 87            MethodInfo getMethod = assembly.GetType(BusinessType).GetMethod("Delete");
 88            Object ret = getMethod.Invoke(obj, new object[] { id });
 89            if (ret == null)
 90            {
 91                throw new Exception(FAILED_ACCESS_STR);
 92            }
 93        }
 94
 95        public void Update(DataSet ds)
 96        {
 97            MethodInfo getMethod = assembly.GetType(BusinessType).GetMethod("Update");
 98            Object ret = getMethod.Invoke(obj, new object[] { ds });
 99            if (ret == null)
100            {
101                throw new Exception(FAILED_ACCESS_STR);
102            }
103        }
104
105        #endregion
106    }
107}

 

2、LogBusiness.cs

1namespace BusinessLogic
2{
3    public class LogBusiness :BaseBusiness, ILog
4    {
5       
6    }
7}

 

ILog和LogBusiness类都是空的，是用来将来方法扩展使用。

转载于:https://www.cnblogs.com/disappearwind/archive/2009/10/20/1586877.html