初始提交

schangxiang@126.com

2025-11-04 f5ed29dc26c7cd952d56ec5721a2efc43cd25992

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
 
namespace HxDbContext
{
 
    public class MySqlEF<T> where T : class, new()
    {
        public readonly DbContext _db = EFDbContextFactory.GetCurrentDbContext();
 
        //public async Task<T> AddAsync(T entity)
        //{
        //    _db.Entry<T>(entity).State = EntityState.Added;
        //    await _db.SaveChangesAsync();
        //    return entity;
        //}
 
        public T Add(T entity)
        {
            _db.Entry<T>(entity).State = EntityState.Added;
            _db.SaveChanges();
            return entity;
        }
 
 
 
 
 
 
        //public async Task<T> UpdateAsync(T entity)
        //{
        //    _db.Set<T>().Attach(entity);
        //    _db.Entry<T>(entity).State = EntityState.Modified;
        //    await _db.SaveChangesAsync();
        //    return entity;
        //}
 
        public T Update(T entity)
        {
            _db.Set<T>().Attach(entity);
            _db.Entry<T>(entity).State = EntityState.Modified;
            _db.SaveChanges();
            return entity;
        }
 
 
 
        //public async Task<bool> DeleteAsync(T entity)
        //{
        //    _db.Set<T>().Attach(entity);
        //    _db.Entry<T>(entity).State = EntityState.Deleted;
        //    int result = await _db.SaveChangesAsync();
        //    return result > 0;
        //}
 
        public bool Delete(T entity)
        {
            _db.Set<T>().Attach(entity);
            _db.Entry<T>(entity).State = EntityState.Deleted;
            int result = _db.SaveChanges();
            return result > 0;
        }
 
 
 
 
 
        //public async Task<T> GetModelAsync(Expression<Func<T, bool>> whereLambda)
        //{
        //    T _entity = await _db.Set<T>().AsNoTracking().FirstOrDefaultAsync<T>(whereLambda);
        //    return _entity;
        //}
 
        public T GetModel(Expression<Func<T, bool>> whereLambda)
        {
            T _entity = _db.Set<T>().AsNoTracking().FirstOrDefault<T>(whereLambda);
            return _entity;
        }
 
 
 
 
        //public async Task<IList<T>> GetListAsync(Expression<Func<T, bool>> whereLambda)
        //{
        //    var _list = await _db.Set<T>().AsNoTracking().Where<T>(whereLambda).ToListAsync();
        //    return _list;
        //}
 
        public IList<T> GetList(Expression<Func<T, bool>> whereLambda)
        {
            var _list = new List<T>();
            if (whereLambda == null)
            {
                _list = _db.Set<T>().ToList();
            }
            else
            {
                _list = _db.Set<T>().AsNoTracking().Where<T>(whereLambda).ToList();
            }
            return _list;
        }
 
        public IList<T> GetList<S>(int topNum, Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> orderByLambda, bool isAsc)
        {
            var _list = new List<T>();
            if (whereLambda == null)
            {
                if (isAsc)
                    _list = _db.Set<T>().OrderBy<T, S>(orderByLambda).ToList();
                else
                    _list = _db.Set<T>().OrderByDescending<T, S>(orderByLambda).ToList();
 
 
            }
            else
            {
                if (isAsc)
                    _list = _db.Set<T>().AsNoTracking().Where<T>(whereLambda).OrderBy<T, S>(orderByLambda).Take(topNum).ToList();
                else
                    _list = _db.Set<T>().AsNoTracking().Where<T>(whereLambda).OrderByDescending<T, S>(orderByLambda).Take(topNum).ToList();
            }
            return _list;
        }
 
 
 
        //public async Task<Tuple<IList<T>, int>> GetPageAsync<S>(int pageSize, int pageIndex, Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> orderByLambda, bool isAsc)
        //{
        //    var _list = _db.Set<T>().AsNoTracking().Where<T>(whereLambda);
        //     int totalRecord = _list.Count() == 0 ? 1 : _list.Count();
        //    IList<T> resultList;
        //    if (isAsc)
        //        resultList = await _list.OrderBy<T, S>(orderByLambda).Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToListAsync();
        //    else
        //        resultList = await _list.OrderByDescending<T, S>(orderByLambda).Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToListAsync();
 
        //    return new Tuple<IList<T>, int>(resultList, totalRecord);
        //}
 
        public Tuple<IList<T>, int> GetPage<S>(int pageSize, int pageIndex, Expression<Func<T, bool>> whereLambda, Expression<Func<T, S>> orderByLambda, bool isAsc)
        {
            try
            {
                var _list = _db.Set<T>().AsNoTracking().Where<T>(whereLambda);
                int totalRecord = _list.Count() == 0 ? 1 : _list.Count();
                IList<T> resultList;
                if (isAsc)
                    resultList = _list.OrderBy<T, S>(orderByLambda).Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToList();
                else
                    resultList = _list.OrderByDescending<T, S>(orderByLambda).Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToList();
 
                return new Tuple<IList<T>, int>(resultList, totalRecord);
            }
            catch (Exception ex)
            {
 
            }
            return null;
        }
    }
 
 
}