csla框架__使用Factory方式实现Csla.BusinessBase对象数据处理

环境：.net4.6+csla4.6

实现：对象的数据库访问及数据库执行使用Factory方式进行封闭。

正文：

以前在使用csla框架完成业务对象的定义时所有的数据处理都在对象内部实现，也不能说不好，对象很大。作者给了通过Factory的方式将对象的数据访问层进行分离，代码更容易维护。以下是我通过Factory的方式实现对象数据访问。

首先是通过csla的约定定义业务对象，其中包含了属性验证：

  1     [Serializable]
  2     [Csla.Server.ObjectFactory("HFunM.Business.Service.CustomDevelop.AssetManage.CategoriesService, HFunM.Business.Service", "CreateCategory", "FetchCategory", "UpdateCategory", "DeleteCategory")]
  3     public class Asset_CategoryER : Csla.BusinessBase<Asset_CategoryER>
  4     {
  5         #region Contructor
  6 
  7         public Asset_CategoryER()
  8         { /* Require use of factory methods */ }
  9 
 10         #endregion
 11 
 12         #region Properties
 13 
 14         public static readonly PropertyInfo<System.String> _actIdProperty
 15             = RegisterProperty<System.String>(p => p.ActId, "主键ID");
 16         /// <summary>
 17         /// 主键ID
 18         /// </summary>
 19         [System.ComponentModel.DataObjectField(true, false)]
 20         public System.String ActId
 21         {
 22             get { return GetProperty(_actIdProperty); }
 23             set { SetProperty(_actIdProperty, value); }
 24         }
 25 
 26         public static readonly PropertyInfo<System.String> _aCTParentIDProperty
 27             = RegisterProperty<System.String>(p => p.ACTParentID, "上级分类ID", (System.String)null);
 28         /// <summary>
 29         /// 上级分类ID
 30         /// </summary>
 31         public System.String ACTParentID
 32         {
 33             get { return GetProperty(_aCTParentIDProperty); }
 34             set { SetProperty(_aCTParentIDProperty, value); }
 35         }
 36 
 37         public static readonly PropertyInfo<System.String> _aCTSysCodeProperty
 38             = RegisterProperty<System.String>(p => p.ACTSysCode, "系统分类编号", (System.String)null);
 39         /// <summary>
 40         /// 系统分类编号
 41         /// </summary>
 42         public System.String ACTSysCode
 43         {
 44             get { return GetProperty(_aCTSysCodeProperty); }
 45             set { SetProperty(_aCTSysCodeProperty, value); }
 46         }
 47 
 48         public static readonly PropertyInfo<System.String> _aCTNameProperty
 49             = RegisterProperty<System.String>(p => p.ACTName, "分类名称", (System.String)null);
 50         /// <summary>
 51         /// 分类名称
 52         /// </summary>
 53         public System.String ACTName
 54         {
 55             get { return GetProperty(_aCTNameProperty); }
 56             set { SetProperty(_aCTNameProperty, value); }
 57         }
 58 
 59         public static readonly PropertyInfo<System.String> _aCTShortNameProperty
 60             = RegisterProperty<System.String>(p => p.ACTShortName, "名称缩写", (System.String)null);
 61         /// <summary>
 62         /// 名称缩写
 63         /// </summary>
 64         public System.String ACTShortName
 65         {
 66             get { return GetProperty(_aCTShortNameProperty); }
 67             set { SetProperty(_aCTShortNameProperty, value); }
 68         }
 69 
 70         public static readonly PropertyInfo<System.String> _aCTStateProperty
 71             = RegisterProperty<System.String>(p => p.ACTState, "分类状态", (System.String)null);
 72         /// <summary>
 73         /// 分类状态
 74         /// </summary>
 75         public System.String ACTState
 76         {
 77             get { return GetProperty(_aCTStateProperty); }
 78             set { SetProperty(_aCTStateProperty, value); }
 79         }
 80 
 81         public static readonly PropertyInfo<System.Int32?> _aCTServiceLifeProperty
 82             = RegisterProperty<System.Int32?>(p => p.ACTServiceLife, "使用年限", (System.Int32?)null);
 83         /// <summary>
 84         /// 使用年限
 85         /// </summary>
 86         public System.Int32? ACTServiceLife
 87         {
 88             get { return GetProperty(_aCTServiceLifeProperty); }
 89             set { SetProperty(_aCTServiceLifeProperty, value); }
 90         }
 91 
 92         public static readonly PropertyInfo<System.Double?> _aCTSalvageRateProperty
 93             = RegisterProperty<System.Double?>(p => p.ACTSalvageRate, "残值率(%)", (System.Double?)null);
 94         /// <summary>
 95         /// 残值率(%)
 96         /// </summary>
 97         public System.Double? ACTSalvageRate
 98         {
 99             get { return GetProperty(_aCTSalvageRateProperty); }
100             set { SetProperty(_aCTSalvageRateProperty, value); }
101         }
102 
103         public static readonly PropertyInfo<System.String> _aCTUnitProperty
104             = RegisterProperty<System.String>(p => p.ACTUnit, "计算单位", (System.String)null);
105         /// <summary>
106         /// 计算单位
107         /// </summary>
108         public System.String ACTUnit
109         {
110             get { return GetProperty(_aCTUnitProperty); }
111             set { SetProperty(_aCTUnitProperty, value); }
112         }
113 
114         public static readonly PropertyInfo<System.String> _aCTRemarkProperty
115             = RegisterProperty<System.String>(p => p.ACTRemark, "备注", (System.String)null);
116         /// <summary>
117         /// 备注
118         /// </summary>
119         public System.String ACTRemark
120         {
121             get { return GetProperty(_aCTRemarkProperty); }
122             set { SetProperty(_aCTRemarkProperty, value); }
123         }
124 
125         public static readonly PropertyInfo<System.String> _aCTVoucherProperty
126             = RegisterProperty<System.String>(p => p.ACTVoucher, "会计凭证号", (System.String)null);
127         /// <summary>
128         /// 会计凭证号
129         /// </summary>
130         public System.String ACTVoucher
131         {
132             get { return GetProperty(_aCTVoucherProperty); }
133             set { SetProperty(_aCTVoucherProperty, value); }
134         }
135 
136         #endregion
137 
138         #region Business Rules
139 
140         /// <summary>
141         /// Contains the CodeSmith generated validation rules.
142         /// </summary>
143         protected override void AddBusinessRules()
144         {
145             // Call the base class, if this call isn't made than any declared System.ComponentModel.DataAnnotations rules will not work.
146             base.AddBusinessRules();
147 
148             BusinessRules.AddRule(new Csla.Rules.CommonRules.Required(_actIdProperty));
149             BusinessRules.AddRule(new Csla.Rules.CommonRules.Required(_aCTNameProperty));
150             BusinessRules.AddRule(new Csla.Rules.CommonRules.Required(_aCTParentIDProperty));
151             BusinessRules.AddRule(new Csla.Rules.CommonRules.Required(_aCTSysCodeProperty));
152             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_actIdProperty, 36));
153             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTParentIDProperty, 36));
154             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTSysCodeProperty, 50));
155             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTNameProperty, 50));
156             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTShortNameProperty, 50));
157             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTStateProperty, 20));
158             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTUnitProperty, 20));
159             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTRemarkProperty, 200));
160             BusinessRules.AddRule(new Csla.Rules.CommonRules.MaxLength(_aCTVoucherProperty, 50));
161         }
162 
163         #endregion
164 
165         #region Factory
166 
167         public static Asset_CategoryER NewCategory(string parentID)
168         {
169             return DataPortal.Create<Asset_CategoryER>(parentID);
170         }
171 
172         public static Asset_CategoryER GetCategory(string id)
173         {
174             return DataPortal.Fetch<Asset_CategoryER>(id);
175         }
176 
177         public static void DeleteCategory(string id)
178         {
179             DataPortal.Delete<Asset_CategoryER>(id);
180         }
181 
182         #endregion
183     }
View Code

可能已经发现了属性Csla.Server.ObjectFactoryAttribute，它就是定义Factory的，其中提供了多种构造方式，如下：

 1 namespace Csla.Server
 2 {
 3     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = false)]
 4     public class ObjectFactoryAttribute : Attribute
 5     {
 6         public ObjectFactoryAttribute(string factoryType);
 7         public ObjectFactoryAttribute(Type factoryType);
 8         public ObjectFactoryAttribute(string factoryType, string fetchMethod);
 9         public ObjectFactoryAttribute(Type factoryType, string fetchMethod);
10         public ObjectFactoryAttribute(string factoryType, string createMethod, string fetchMethod);
11         public ObjectFactoryAttribute(Type factoryType, string createMethod, string fetchMethod);
12         public ObjectFactoryAttribute(string factoryType, string createMethod, string fetchMethod, string updateMethod, string deleteMethod);
13         public ObjectFactoryAttribute(Type factoryType, string createMethod, string fetchMethod, string updateMethod, string deleteMethod);
14         public ObjectFactoryAttribute(string factoryType, string createMethod, string fetchMethod, string updateMethod, string deleteMethod, string executeMethod);
15         public ObjectFactoryAttribute(Type factoryType, string createMethod, string fetchMethod, string updateMethod, string deleteMethod, string executeMethod);
16 
17         public string FactoryTypeName { get; }
18         public string CreateMethodName { get; }
19         public string FetchMethodName { get; }
20         public string UpdateMethodName { get; }
21         public string DeleteMethodName { get; }
22         public string ExecuteMethodName { get; }
23     }
24 }
View Code

以下是Factory的数据访问实现：

  1     public class CategoriesService : Data.Repository.RepositoryFactory<Entity.CustomDevelop.AssetEntity.Asset_CategoryEntity>
  2     {
  3         #region 列表
  4 
  5         /// <summary>
  6         /// 加载所有数据
  7         /// </summary>
  8         /// <returns></returns>
  9         public Asset_CategoryList FetchList()
 10         {
 11             var obj = (Asset_CategoryList)MethodCaller.CreateInstance(typeof(Asset_CategoryList));
 12             var rlce = obj.RaiseListChangedEvents;
 13             obj.RaiseListChangedEvents = false;
 14             base.SetIsReadOnly(obj, false);
 15 
 16             var child = base.BaseRepository().IQueryable(p => p.ACT_State == "1");
 17             foreach (var item in child)
 18             {
 19                 obj.Add(CreateItem(item));
 20             }
 21 
 22             base.SetIsReadOnly(obj, true);
 23             obj.RaiseListChangedEvents = rlce;
 24             return obj;
 25         }
 26 
 27         /// <summary>
 28         /// 创建列表子对象
 29         /// </summary>
 30         /// <returns></returns>
 31         public Asset_CategoryInfo CreateItem()
 32         {
 33             var obj = (Asset_CategoryInfo)MethodCaller.CreateInstance(typeof(Asset_CategoryInfo));
 34             LoadProperty(obj, Asset_CategoryInfo._actIdProperty, Util.CommonHelper.GetGuid);
 35             MarkNew(obj);
 36             CheckRules(obj);
 37             return obj;
 38         }
 39 
 40         /// <summary>
 41         /// 
 42         /// </summary>
 43         /// <param name="et"></param>
 44         /// <returns></returns>
 45         public Asset_CategoryInfo CreateItem(Entity.CustomDevelop.AssetEntity.Asset_CategoryEntity et)
 46         {
 47             var obj = (Asset_CategoryInfo)MethodCaller.CreateInstance(typeof(Asset_CategoryInfo));
 48             MarkAsChild(obj);
 49 
 50             LoadProperty(obj, Asset_CategoryInfo._actIdProperty, et.ACT_ID);
 51             LoadProperty(obj, Asset_CategoryInfo._aCTNameProperty, et.ACT_Name);
 52             LoadProperty(obj, Asset_CategoryInfo._aCTParentIDProperty, et.ACT_ParentID);
 53             LoadProperty(obj, Asset_CategoryInfo._aCTRemarkProperty, et.ACT_Remark);
 54             LoadProperty(obj, Asset_CategoryInfo._aCTSalvageRateProperty, et.ACT_SalvageRate);
 55             LoadProperty(obj, Asset_CategoryInfo._aCTServiceLifeProperty, et.ACT_ServiceLife);
 56             LoadProperty(obj, Asset_CategoryInfo._aCTShortNameProperty, et.ACT_ShortName);
 57             LoadProperty(obj, Asset_CategoryInfo._aCTStateProperty, et.ACT_State);
 58             LoadProperty(obj, Asset_CategoryInfo._aCTSysCodeProperty, et.ACT_SysCode);
 59             LoadProperty(obj, Asset_CategoryInfo._aCTUnitProperty, et.ACT_Unit);
 60             LoadProperty(obj, Asset_CategoryInfo._aCTVoucherProperty, et.ACT_Voucher);
 61 
 62             MarkOld(obj);
 63             return obj;
 64         }
 65 
 66         #endregion
 67 
 68         #region 主对象
 69 
 70         /// <summary>
 71         /// 创建类别
 72         /// </summary>
 73         /// <returns></returns>
 74         public Asset_CategoryER CreateCategory(string parentID)
 75         {
 76             var obj = (Asset_CategoryER)MethodCaller.CreateInstance(typeof(Asset_CategoryER));
 77             LoadProperty(obj, Asset_CategoryER._actIdProperty, Util.CommonHelper.GetGuid);
 78             LoadProperty(obj, Asset_CategoryER._aCTParentIDProperty, parentID);
 79             MarkNew(obj);
 80             CheckRules(obj);
 81             return obj;
 82         }
 83 
 84         /// <summary>
 85         /// 加载类别
 86         /// </summary>
 87         /// <param name="id">类别ID</param>
 88         /// <returns></returns>
 89         public Asset_CategoryER FetchCategory(string id)
 90         {
 91             var et = base.BaseRepository().FindEntity(id);
 92             if (et != null)
 93             {
 94                 var obj = (Asset_CategoryER)MethodCaller.CreateInstance(typeof(Asset_CategoryER));
 95                 LoadProperty(obj, Asset_CategoryER._actIdProperty, et.ACT_ID);
 96                 LoadProperty(obj, Asset_CategoryER._aCTNameProperty, et.ACT_Name);
 97                 LoadProperty(obj, Asset_CategoryER._aCTParentIDProperty, et.ACT_ParentID);
 98                 LoadProperty(obj, Asset_CategoryER._aCTRemarkProperty, et.ACT_Remark);
 99                 LoadProperty(obj, Asset_CategoryER._aCTSalvageRateProperty, et.ACT_SalvageRate);
100                 LoadProperty(obj, Asset_CategoryER._aCTServiceLifeProperty, et.ACT_ServiceLife);
101                 LoadProperty(obj, Asset_CategoryER._aCTShortNameProperty, et.ACT_ShortName);
102                 LoadProperty(obj, Asset_CategoryER._aCTStateProperty, et.ACT_State);
103                 LoadProperty(obj, Asset_CategoryER._aCTSysCodeProperty, et.ACT_SysCode);
104                 LoadProperty(obj, Asset_CategoryER._aCTUnitProperty, et.ACT_Unit);
105                 LoadProperty(obj, Asset_CategoryER._aCTVoucherProperty, et.ACT_Voucher);
106 
107                 MarkOld(obj);
108                 CheckRules(obj);
109                 return obj;
110             }
111             else
112             {
113                 return null;
114             }
115         }
116 
117         /// <summary>
118         /// 更新类别
119         /// </summary>
120         /// <param name="obj">更新对象</param>
121         /// <returns></returns>
122         public Asset_CategoryER UpdateCategory(Asset_CategoryER obj)
123         {
124             if (obj.IsDeleted)
125             {
126                 if (!obj.IsNew)
127                 {
128                     //旧对象，删除
129                     DeleteCategory(obj.ActId);
130                 }
131                 //创建新的
132                 MarkNew(obj);
133             }
134             else
135             {
136                 CheckRules(obj);
137                 if (!obj.IsSavable)
138                 {
139                     throw new Csla.Rules.ValidationException(obj.BrokenRulesCollection.ToString());
140                 }
141                 if (obj.IsNew)
142                 {
143                     //创建
144                     Entity.CustomDevelop.AssetEntity.Asset_CategoryEntity entity = new Entity.CustomDevelop.AssetEntity.Asset_CategoryEntity();
145                     entity.ACT_ID = obj.ActId;
146                     entity.ACT_Name = obj.ACTName;
147                     entity.ACT_ParentID = obj.ACTParentID;
148                     entity.ACT_Remark = obj.ACTRemark;
149                     entity.ACT_SalvageRate = obj.ACTSalvageRate;
150                     entity.ACT_ServiceLife = obj.ACTServiceLife;
151                     entity.ACT_ShortName = obj.ACTShortName;
152                     entity.ACT_State = obj.ACTState;
153                     entity.ACT_SysCode = obj.ACTSysCode;
154                     entity.ACT_Unit = obj.ACTUnit;
155                     entity.ACT_Voucher = obj.ACTVoucher;
156 
157                     base.BaseRepository().Insert(entity);
158                 }
159                 else
160                 {
161                     //更新
162                     var entity = base.BaseRepository().FindEntity(obj.ActId);
163                     entity.ACT_Name = obj.ACTName;
164                     entity.ACT_ParentID = obj.ACTParentID;
165                     entity.ACT_Remark = obj.ACTRemark;
166                     entity.ACT_SalvageRate = obj.ACTSalvageRate;
167                     entity.ACT_ServiceLife = obj.ACTServiceLife;
168                     entity.ACT_ShortName = obj.ACTShortName;
169                     entity.ACT_State = obj.ACTState;
170                     entity.ACT_SysCode = obj.ACTSysCode;
171                     entity.ACT_Unit = obj.ACTUnit;
172                     entity.ACT_Voucher = obj.ACTVoucher;
173 
174                     base.BaseRepository().Update(entity);
175                 }
176                 MarkOld(obj);
177             }
178             return obj;
179         }
180 
181         public void DeleteCategory(string id)
182         {
183             base.BaseRepository().Delete(id);
184         }
185 
186         #endregion
187     }
View Code

数据的访问是通过EF实现，通过定义数据访问基类，承载了EF的访问接口以及csla框架提供的ObjectFactory：

1 public class RepositoryFactory<T> : Csla.Server.ObjectFactory
2         where T : class, new()

以上即实现的Csla业务对象及其数据访问对象，其他类型的如列表对象等都可以通过该方式实现。

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原文地址：https://www.cnblogs.com/quluqi/p/HFun_Csla_Factory.html