Entity Framework自用的DataBase基类

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using Model;
 6 using System.Data.Objects.DataClasses;
 7
 8 namespace Work
 9 {
10     public class DataBase<T> where T : EntityObject
11     {
12         protected OfficeAnywhereEntities entities = new OfficeAnywhereEntities();
13
14         /// <summary>
15         /// 添加
16         /// </summary>
17         /// <param name="t"></param>
18         /// <returns></returns>
19         public bool Add(T t)
20         {
21             entities.AddObject(typeof(T).Name, t);
22             return SaveChanges() > 0;
23         }
24
25         /// <summary>
26         /// 执行
27         /// </summary>
28         /// <returns></returns>
29         private int SaveChanges()
30         {
31             try
32             {
33                 return entities.SaveChanges();
34             }
35             catch (Exception e)
36             {
37                 throw e.InnerException;
38             }
39
40         }
41
42         /// <summary>
43         /// 寻找对象
44         /// </summary>
45         /// <param name="Guid"></param>
46         /// <returns></returns>
47         private T FindByGuid(string Guid)
48         {
49             T t = null;
50             entities.CreateObjectSet<T>().ToList().ForEach(p => {
51                 if (p.EntityKey.EntityKeyValues[0].Value.ToString() == Guid)
52                     t = p;
53             });
54             return t;
55         }
56
57         /// <summary>
58         /// 删除
59         /// </summary>
60         /// <param name="Guid"></param>
61         /// <returns></returns>
62         public bool DelByGuid(string Guid)
63         {
64             T t = FindByGuid(Guid);
65             if(t!=null)
66             entities.DeleteObject(t);
67             return SaveChanges() > 0;
68         }
69
70         /// <summary>
71         /// 更新
72         /// </summary>
73         /// <param name="Guid"></param>
74         /// <param name="act"></param>
75         /// <returns></returns>
76         public bool UpdateByGuid(string Guid, Action<T> act)
77         {
78             T t = FindByGuid(Guid);
79             act(t);
80             return SaveChanges() > 0;
81         }
82
83         /// <summary>
84         /// 列表
85         /// </summary>
86         /// <returns></returns>
87         public List<T> GetList()
88         {
89             return entities.CreateObjectSet<T>().ToList();
90         }
91     }
92 }