EF的操作类网上很多类，我只是把我在平时项目中的类进行一些改进和扩展，扩展了部分同步和异步的EF操作
接口
1 /// <summary> 2 /// 接口数据操作基础类 3 /// </summary> 4 /// <typeparam name="Key"></typeparam> 5 /// <typeparam name="Entity"></typeparam> 6 public interface IBaseOpertion<TEntity, TKey> where TEntity : class 7 { 8 /// <summary> 9 /// 添加数据 10 /// </summary> 11 /// <param name="tableName"></param> 12 /// <param name="table"></param> 13 /// <returns></returns> 14 int AddTable(string tableName, DataTable table); 15 Task<int> AddTableAsy(string tableName, DataTable table); 16 /// <summary> 17 /// 添加 18 /// </summary> 19 /// <param name="entity"></param> 20 /// <returns></returns> 21 TEntity AddEntity(TEntity entity); 22 Task<TEntity> AddEntityAsy(TEntity entity); 23 /// <summary> 24 /// 批量添加 25 /// </summary> 26 /// <param name="list"></param> 27 /// <returns></returns> 28 int AddEntity(List<TEntity> list); 29 Task<int> AddEntityAys(List<TEntity> list); 30 /// <summary> 31 /// 修改 32 /// </summary> 33 /// <param name="entity"></param> 34 /// <returns></returns> 35 TEntity UpdateEntity(TEntity entity); 36 Task<TEntity> UpdateEntityAsy(TEntity entity); 37 /// <summary> 38 /// 删除 实体 39 /// </summary> 40 /// <param name="TEntity"></param> 41 /// <returns></returns> 42 int DelEntity(TEntity entity); 43 Task<int> DelEntityAsy(TEntity entity); 44 // <summary> 45 /// 删除 主键 46 /// </summary> 47 /// <param name="TEntity"></param> 48 /// <returns></returns> 49 int DelEntity(TKey key); 50 Task<int> DelEntityAsy(TKey key); 51 // <summary> 52 /// 删除 条件 53 /// </summary> 54 /// <param name="TEntity"></param> 55 /// <returns></returns> 56 int DelEntity(Dictionary<string,object> where); 57 Task<int> DelEntityAsy(Dictionary<string, object> where); 58 59 /// <summary> 60 /// 根据ID进行查询 61 /// </summary> 62 /// <param name="key"></param> 63 /// <returns></returns> 64 TEntity GetEntityByID(TKey key); 65 Task<TEntity> GetEntityByIDAsy(TKey key); 66 /// <summary> 67 /// 根据sql进行查询 68 /// </summary> 69 /// <param name="predicate"></param> 70 /// <returns></returns> 71 List<TEntity> GetEntityQuerySql(string sql); 72 Task<List<TEntity>> GetEntityQuerySqlAsy(string sql); 73 /// <summary> 74 /// 根据条件进行查询 75 /// </summary> 76 /// <param name="fun"></param> 77 /// <returns></returns> 78 List<TEntity> GetEntityLisrByWhere(Expression<Func<TEntity, bool>> fun); 79 Task<List<TEntity>> GetEntityLisrByWhereAsy(Expression<Func<TEntity, bool>> fun); 80 81 /// <summary> 82 /// 根据条件进行查询 83 /// </summary> 84 /// <param name="fun"></param> 85 /// <returns></returns> 86 TEntity GetEntityByWhere(Expression<Func<TEntity, bool>> fun); 87 Task<TEntity> GetEntityByWhereAsy(Expression<Func<TEntity, bool>> fun); 88 }
实现类
1 /// <summary> 2 /// 数据实体操作 3 /// </summary> 4 /// <typeparam name="TEntity"></typeparam> 5 /// <typeparam name="TKey"></typeparam> 6 public abstract class BaseService<TEntity, TKey> : IBaseOpertion<TEntity, TKey> where TEntity : class 7 { 8 public virtual TEntity AddEntity(TEntity entity) 9 { 10 using (DBContextHelper dbHelper = new DBContextHelper()) 11 { 12 TEntity newEntity = dbHelper.Set<TEntity>().Add(entity); 13 if (dbHelper.SaveChanges() > 0) 14 return newEntity; 15 return null; 16 } 17 } 18 public virtual async Task<TEntity> AddEntityAsy(TEntity entity) { 19 using (DBContextHelper dbHelper = new DBContextHelper()) 20 { 21 TEntity newEntity = dbHelper.Set<TEntity>().Add(entity); 22 int temp =await dbHelper.SaveChangesAsync(); 23 if (temp > 0) 24 return newEntity; 25 return null; 26 } 27 } 28 29 public virtual TEntity UpdateEntity(TEntity entity) 30 { 31 using (DBContextHelper dbHelper = new DBContextHelper()) 32 { 33 DbSet<TEntity> dbSet = dbHelper.Set<TEntity>(); 34 DbEntityEntry<TEntity> entry = dbHelper.Entry<TEntity>(entity); 35 if (entry.State == System.Data.Entity.EntityState.Detached) 36 { 37 dbSet.Attach(entity); 38 entry.State = System.Data.Entity.EntityState.Modified; 39 } 40 if (dbHelper.SaveChanges() >= 0) 41 return entity; 42 return null; 43 } 44 } 45 public virtual async Task<TEntity> UpdateEntityAsy(TEntity entity) 46 { 47 using (DBContextHelper dbHelper = new DBContextHelper()) 48 { 49 DbSet<TEntity> dbSet = dbHelper.Set<TEntity>(); 50 DbEntityEntry<TEntity> entry = dbHelper.Entry<TEntity>(entity); 51 if (entry.State == System.Data.Entity.EntityState.Detached) 52 { 53 dbSet.Attach(entity); 54 entry.State = System.Data.Entity.EntityState.Modified; 55 } 56 int result = await dbHelper.SaveChangesAsync(); 57 if (result >= 0) 58 return entity; 59 return null; 60 } 61 } 62 63 public virtual int DelEntity(TEntity entity) 64 { 65 using (DBContextHelper dbHelper = new DBContextHelper()) 66 { 67 dbHelper.Set<TEntity>().Remove(entity); 68 return dbHelper.SaveChanges(); 69 } 70 } 71 public virtual async Task<int> DelEntityAsy(TEntity entity) 72 { 73 using (DBContextHelper dbHelper = new DBContextHelper()) 74 { 75 dbHelper.Set<TEntity>().Remove(entity); 76 return await dbHelper.SaveChangesAsync(); 77 } 78 } 79 80 81 public virtual TEntity GetEntityByID(TKey key) 82 { 83 using (DBContextHelper dbHelper = new DBContextHelper()) 84 { 85 var entity = dbHelper.Set<TEntity>().Find(key); 86 return entity; 87 } 88 } 89 public virtual async Task<TEntity> GetEntityByIDAsy(TKey key) 90 { 91 using (DBContextHelper dbHelper = new DBContextHelper()) 92 { 93 return await dbHelper.Set<TEntity>().FindAsync(key); 94 } 95 } 96 97 98 99 100 public virtual List<TEntity> GetEntityQuerySql(string sql) 101 { 102 using (DBContextHelper dbHelper = new DBContextHelper()) 103 { 104 var entity = dbHelper.Set<TEntity>().SqlQuery(sql, new object[] { }).ToList(); 105 return entity; 106 } 107 } 108 public virtual async Task<List<TEntity>> GetEntityQuerySqlAsy(string sql) 109 { 110 using (DBContextHelper dbHelper = new DBContextHelper()) 111 { 112 return await dbHelper.Set<TEntity>().SqlQuery(sql, new object[] { }).ToListAsync(); 113 } 114 } 115 116 117 118 119 public virtual List<TEntity> GetEntityLisrByWhere(Expression<Func<TEntity, bool>> fun) 120 { 121 using (DBContextHelper dbHelper = new DBContextHelper()) 122 { 123 var entity = dbHelper.Set<TEntity>().AsNoTracking().Where(fun).ToList(); 124 return entity; 125 } 126 } 127 public virtual async Task<List<TEntity>> GetEntityLisrByWhereAsy(Expression<Func<TEntity, bool>> fun) 128 { 129 using (DBContextHelper dbHelper = new DBContextHelper()) 130 { 131 return await dbHelper.Set<TEntity>().AsNoTracking().Where(fun).ToListAsync(); 132 } 133 } 134 135 public virtual int AddEntity(List<TEntity> list) 136 { 137 using (DBContextHelper dbHelper = new DBContextHelper()) 138 { 139 dbHelper.Configuration.AutoDetectChangesEnabled = false; 140 try 141 { 142 dbHelper.Set<TEntity>().AddRange(list); 143 return dbHelper.SaveChanges(); 144 } 145 finally 146 { 147 dbHelper.Configuration.AutoDetectChangesEnabled = true; 148 } 149 } 150 } 151 public virtual async Task<int> AddEntityAys(List<TEntity> list) 152 { 153 using (DBContextHelper dbHelper = new DBContextHelper()) 154 { 155 dbHelper.Configuration.AutoDetectChangesEnabled = false; 156 try 157 { 158 dbHelper.Set<TEntity>().AddRange(list); 159 return await dbHelper.SaveChangesAsync(); 160 } 161 finally 162 { 163 dbHelper.Configuration.AutoDetectChangesEnabled = true; 164 } 165 } 166 } 167 168 public virtual int DelEntity(TKey key) 169 { 170 using (DBContextHelper dbHelper = new DBContextHelper()) 171 { 172 var entity = dbHelper.Set<TEntity>().Find(key); 173 dbHelper.Set<TEntity>().Remove(entity); 174 return dbHelper.SaveChanges(); 175 } 176 } 177 public virtual async Task<int> DelEntityAsy(TKey key) 178 { 179 using (DBContextHelper dbHelper = new DBContextHelper()) 180 { 181 var entity = dbHelper.Set<TEntity>().Find(key); 182 dbHelper.Set<TEntity>().Remove(entity); 183 return await dbHelper.SaveChangesAsync(); ; 184 } 185 } 186 187 public virtual int DelEntity(Dictionary<string, object> where) 188 { 189 using (DBContextHelper dbHelper = new DBContextHelper()) 190 { 191 if (where == null || where.Keys.Count <= 0) return 0; 192 StringBuilder sb = new StringBuilder(); 193 List<string> KeyList = new List<string>(where.Keys); 194 List<SqlParameter> plist = new List<SqlParameter>(); 195 for (int i = 0, j = KeyList.Count; i < j; i++) 196 { 197 plist.Add(new SqlParameter() 198 { 199 ParameterName = KeyList[i], 200 Value = where[KeyList[i]] 201 }); 202 if (i == j - 1) 203 { 204 sb.Append(string.Format(" {0}=@{0} ", KeyList[i])); 205 } 206 sb.Append(string.Format("{0}=@{0} and ", KeyList[i])); 207 } 208 string TableName = this.GetType().Name; 209 string sql = string.Format("delete from [{0}] where {1}", TableName, sb.ToString()); 210 dbHelper.Set<TEntity>().SqlQuery(sql, plist); 211 return dbHelper.SaveChanges(); 212 } 213 } 214 public virtual async Task<int> DelEntityAsy(Dictionary<string, object> where) 215 { 216 using (DBContextHelper dbHelper = new DBContextHelper()) 217 { 218 if (where == null || where.Keys.Count <= 0) return 0; 219 StringBuilder sb = new StringBuilder(); 220 List<string> KeyList = new List<string>(where.Keys); 221 List<SqlParameter> plist = new List<SqlParameter>(); 222 for (int i = 0, j = KeyList.Count; i < j; i++) 223 { 224 plist.Add(new SqlParameter() 225 { 226 ParameterName = KeyList[i], 227 Value = where[KeyList[i]] 228 }); 229 if (i == j - 1) 230 { 231 sb.Append(string.Format(" {0}=@{0} ", KeyList[i])); 232 } 233 sb.Append(string.Format("{0}=@{0} and ", KeyList[i])); 234 } 235 string TableName = this.GetType().Name; 236 string sql = string.Format("delete from [{0}] where {1}", TableName, sb.ToString()); 237 dbHelper.Set<TEntity>().SqlQuery(sql, plist); 238 return await dbHelper.SaveChangesAsync(); 239 } 240 } 241 242 public virtual TEntity GetEntityByWhere(Expression<Func<TEntity, bool>> fun) 243 { 244 using (DBContextHelper dbHelper = new DBContextHelper()) 245 { 246 var entity = dbHelper.Set<TEntity>().AsNoTracking().Where(fun).FirstOrDefault(); 247 return entity; 248 } 249 } 250 public virtual async Task<TEntity> GetEntityByWhereAsy(Expression<Func<TEntity, bool>> fun) 251 { 252 using (DBContextHelper dbHelper = new DBContextHelper()) 253 { 254 return await dbHelper.Set<TEntity>().AsNoTracking().Where(fun).FirstOrDefaultAsync(); 255 } 256 } 257 258 259 260 public virtual int AddTable(string tableName, DataTable table) 261 { 262 if (string.IsNullOrEmpty(tableName) || table==null || table.Rows.Count<0) 263 return -1; 264 else 265 { 266 using (DBContextHelper dbHelper = new DBContextHelper()) 267 { 268 try 269 { 270 if (dbHelper.Database.Connection.State != ConnectionState.Open) 271 { 272 var bulkCopy = new SqlBulkCopy((SqlConnection)dbHelper.Database.Connection); 273 bulkCopy.DestinationTableName = tableName; 274 bulkCopy.WriteToServer(table); 275 } 276 return table.Rows.Count; 277 } 278 catch (Exception e) 279 { 280 throw e; 281 } 282 finally { 283 if (dbHelper.Database.Connection.State != ConnectionState.Closed) 284 { 285 dbHelper.Database.Connection.Close(); 286 } 287 } 288 } 289 } 290 } 291 public virtual async Task<int> AddTableAsy(string tableName, DataTable table) 292 { 293 if (string.IsNullOrEmpty(tableName) || table == null || table.Rows.Count < 0) 294 return -1; 295 else 296 { 297 using (DBContextHelper dbHelper = new DBContextHelper()) 298 { 299 try 300 { 301 if (dbHelper.Database.Connection.State != ConnectionState.Open) 302 { 303 var bulkCopy = new SqlBulkCopy((SqlConnection)dbHelper.Database.Connection); 304 bulkCopy.DestinationTableName = tableName; 305 await bulkCopy.WriteToServerAsync(table); 306 } 307 return table.Rows.Count; 308 } 309 catch (Exception e) 310 { 311 throw e; 312 } 313 finally 314 { 315 if (dbHelper.Database.Connection.State != ConnectionState.Closed) 316 { 317 dbHelper.Database.Connection.Close(); 318 } 319 } 320 } 321 } 322 } 323 }