1 /// <summary>
2 /// 在数据仓储的情况下进一步封装数据库基础操作，此版本为异步版本 Created by ZhangQC 2016.08.17
3 /// </summary>
4 public static partial class EntityExtend
5 {
6 /// <summary>
7 /// 日志
8 /// </summary>
9 private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
10
11 #region 数据库查询
12
13 /// <summary>
14 /// 根据实体和条件获取数据库对应表 Created by ZhangQC 2016.08.17
15 /// </summary>
16 /// <typeparam name="T">泛指Entity</typeparam>
17 /// <param name="entity">数据库实体</param>
18 /// <param name="where">查询条件</param>
19 /// <returns></returns>
20 public static async Task<IEnumerable<T>> GetTableAsync<T>(this T entity, Expression<Func<T, bool>> where = null) where T : class
21 {
22 return await Task.Run(() =>
23 {
24 try
25 {
26 using (var db = new Repository<T>(new EFContext().ContextRead))
27 {
28 return @where != null ? db.DoQuery(@where).ToList() : db.DoQuery().ToList();
29 }
30 }
31 catch (Exception ex)
32 {
33 Log.ErrorFormat("根据实体和条件获取数据库对应表出错：{0}", ex);
34 throw new ApplicationException("数据库查询失败");
35 }
36 });
37 }
38
39 /// <summary>
40 /// 获取表总数
41 /// </summary>
42 /// <typeparam name="T"></typeparam>
43 /// <param name="entity"></param>
44 /// <param name="where"></param>
45 /// <returns></returns>
46 public static async Task<int> GetCount<T>(this T entity, Expression<Func<T, bool>> where = null) where T : class
47 {
48 return await Task.Run(() =>
49 {
50 try
51 {
52 using (var db = new Repository<T>(new EFContext().ContextRead))
53 {
54 return @where != null ? db.DoQuery(@where).Count() : db.DoQuery().Count();
55 }
56 }
57 catch (Exception ex)
58 {
59 Log.ErrorFormat("获取表总数量出错：{0}", ex);
60 throw new ApplicationException("数据库查询失败");
61 }
62 });
63 }
64
65
66 /// <summary>
67 /// 查询数据，支持分页，排序，过滤操作 倒叙
68 /// </summary>
69 /// <remarks>"此方法完全是为了兼容MVCPager定制，不属于框架部分"</remarks>
70 /// <returns></returns>
71 public static async Task<PagedList<T>> GetTableBySortDescPageListAsync<T>(this T entity, int pageIndex, int pageSize, Expression<Func<T, bool>> where = null,
72 Expression<Func<T, object>> sort = null) where T : class
73 {
74 return await Task.Run(() =>
75 {
76 try
77 {
78 using (var db = new Repository<T>(new EFContext().ContextRead))
79 {
80 var table = @where != null
81 ? db.DoQuery(@where)
82 : db.DoQuery();
83 //如果排序为null，那么就按实体其中的一个主键进行排序
84 if (sort == null)
85 {
86 var entitySet = db.EntitySet<T>();
87 var keyCollections = entitySet.ElementType.KeyMembers;
88 if (keyCollections.FirstOrDefault() == null)
89 {
90 throw new ApplicationException("要查询的表没有发现主键！");
91 }
92 //自动生成主键排序字段
93 var entityKey = keyCollections.Aggregate(string.Empty, (a, b) => a + b + " desc,").TrimEnd(',');
94 //排序后的IQuaryable
95 var tableSortNull = table.OrderUsingSortExpression(entityKey);
96 return tableSortNull.ToPagedList(pageIndex, pageSize);
97 }
98 var tableSort = table.OrderBy(@sort);
99 return tableSort.ToPagedList(pageIndex, pageSize);
100 }
101 }
102 catch (Exception ex)
103 {
104 Log.ErrorFormat("对指定实体进行查询，可以分页，可以排序出错：{0}", ex);
105 throw new ApplicationException("数据库查询失败");
106 }
107 });
108 }
109
110 /// <summary>
111 /// 查询数据，支持分页，排序，过滤操作 正叙
112 /// </summary>
113 /// <remarks>"此方法完全是为了兼容MVCPager定制，不属于框架部分"</remarks>
114 /// <returns></returns>
115 public static async Task<PagedList<T>> GetTableBySortAscPageListAsync<T>(this T entity, int pageIndex, int pageSize, Expression<Func<T, bool>> where = null,
116 Expression<Func<T, object>> sort = null) where T : class
117 {
118 return await Task.Run(() =>
119 {
120 try
121 {
122 using (var db = new Repository<T>(new EFContext().ContextRead))
123 {
124 var table = @where != null
125 ? db.DoQuery(@where)
126 : db.DoQuery();
127 //如果排序为null，那么就按实体其中的一个主键进行排序
128 if (sort == null)
129 {
130 var entitySet = db.EntitySet<T>();
131 var keyCollections = entitySet.ElementType.KeyMembers;
132 if (keyCollections.FirstOrDefault() == null)
133 {
134 throw new ApplicationException("要查询的表没有发现主键！");
135 }
136 //自动生成主键排序字段
137 var entityKey =
138 keyCollections.Aggregate(string.Empty, (a, b) => a + b + " asc,").TrimEnd(',');
139
140 #region 注释代码，警醒用
141
142 //主键类型
143 //var type = ((EdmProperty) keyCollections).PrimitiveType.ClrEquivalentType;
144 //创建实例
145 //var entityActivator = Activator.CreateInstance<T>();
146 ////创建类型实例
147 //var tKeyActivator = Activator.CreateInstance(type);
148
149 #endregion
150
151 //排序后的IQuaryable
152 var tableSortNull = table.OrderUsingSortExpression(entityKey);
153 return tableSortNull.ToPagedList(pageIndex, pageSize);
154 }
155 var tableSort = table.OrderBy(@sort);
156 return tableSort.ToPagedList(pageIndex, pageSize);
157 }
158 }
159 catch (Exception ex)
160 {
161 Log.ErrorFormat("对指定实体进行查询，可以分页，可以排序出错：{0}", ex);
162 throw new ApplicationException("数据库查询失败");
163 }
164 });
165 }
166
167
168
169 /// <summary>
170 /// 根据实体和条件获取数据库对应表 Created by ZhangQC 2016.08.17
171 /// </summary>
172 /// <typeparam name="T">泛指Entity</typeparam>
173 /// <param name="entity">数据库实体</param>
174 /// <param name="where">查询条件</param>
175 /// <returns></returns>
176 public static async Task<T> GetTableSingleAsync<T>(this T entity, Expression<Func<T, bool>> where = null) where T : class
177 {
178 return await Task.Run(() =>
179 {
180 try
181 {
182 using (var db = new Repository<T>(new EFContext().ContextRead))
183 {
184 return @where != null ? db.DoQuery(@where).FirstOrDefault() : db.DoQuery().FirstOrDefault();
185 }
186 }
187 catch (Exception ex)
188 {
189 Log.ErrorFormat("根据实体和条件获取数据库对应表出错：{0}", ex);
190 throw new ApplicationException("数据库查询失败");
191 }
192 });
193 }
194
195
196
197
198 /// <summary>
199 /// 根据实体和条件查询数据库对应表加排序功能 Created by ZhangQC 2016.08.17
200 /// </summary>
201 /// <typeparam name="T">泛指实体</typeparam>
202 /// <param name="entity">数据库实体</param>
203 /// <param name="where">泛指查询条件表达式</param>
204 /// <param name="sort">泛指排序表达式</param>
205 /// <returns></returns>
206 public static async Task<IEnumerable<T>> GetTableBySortAsync<T>(this T entity, Expression<Func<T, bool>> where = null,
207 Func<T, object> sort = null) where T : class
208 {
209 try
210 {
211 var table = await entity.GetTableAsync(@where);
212 return @sort != null ? table.OrderBy(@sort).ToList() : table.ToList();
213 }
214 catch (Exception ex)
215 {
216 Log.ErrorFormat("根据实体和条件查询数据库对应表加排序功能出错：{0}", ex);
217 throw new ApplicationException("数据库查询失败");
218 }
219 }
220
221
222 /// <summary>
223 /// 根据实体和条件查询数据库对应表加排序功能 Created by ZhangQC 2016.08.17
224 /// </summary>
225 /// <typeparam name="T">泛指实体</typeparam>
226 /// <param name="entity">数据库实体</param>
227 /// <param name="where">泛指查询条件表达式</param>
228 /// <param name="sort">泛指排序表达式</param>
229 /// <returns></returns>
230 public static async Task<IEnumerable<T>> GetTableBySortDescAsync<T>(this T entity, Expression<Func<T, bool>> where = null,
231 Func<T, object> sort = null) where T : class
232 {
233 try
234 {
235 var table = await entity.GetTableAsync(@where);
236 return @sort != null ? table.OrderByDescending(@sort).ToList() : table.ToList();
237 }
238 catch (Exception ex)
239 {
240 Log.ErrorFormat("根据实体和条件查询数据库对应表加排序功能出错：{0}", ex);
241 throw new ApplicationException("数据库查询失败");
242 }
243 }
244
245
246
247 /// <summary>
248 /// 对指定实体进行查询，可以分页，可以排序 Created by ZhangQC 2016.08.17
249 /// </summary>
250 /// <typeparam name="T">泛指实体</typeparam>
251 /// <param name="entity">数据库实体</param>
252 /// <param name="skip">从多少条开始</param>
253 /// <param name="take">共取多少条</param>
254 /// <param name="where">泛指查询条件表达式</param>
255 /// <param name="sort">泛指排序表达式</param>
256 /// <returns></returns>
257 public static async Task<IEnumerable<T>> GetTableBySoryPageAsync<T>(this T entity, int? skip, int? take, Expression<Func<T, bool>> where = null,
258 Expression<Func<T, object>> sort = null) where T : class
259 {
260 return await Task.Run(() =>
261 {
262 try
263 {
264 using (var db = new Repository<T>(new EFContext().ContextRead))
265 {
266 var table = @where != null
267 ? db.DoQuery(@where)
268 : db.DoQuery();
269 if (@skip == null || @take == null)
270 return @sort != null ? table.OrderBy(@sort).ToList() : table.ToList();
271 //如果排序为null，那么就按实体其中的一个主键进行排序
272 if (sort == null)
273 {
274 var entitySet = db.EntitySet<T>();
275 var keyCollections = entitySet.ElementType.KeyMembers;
276 if (keyCollections.FirstOrDefault() == null)
277 {
278 throw new ApplicationException("要查询的表没有发现主键！");
279 }
280 //自动生成主键排序字段
281 var entityKey = keyCollections.Aggregate(string.Empty, (a, b) => a + b + " asc,").TrimEnd(',');
282 //排序后的IQuaryable
283 var tableSortNull = table.OrderUsingSortExpression(entityKey);
284 return tableSortNull.Skip((int)@skip).Take((int)@take).ToList();
285 }
286 var tableSort = table.OrderBy(@sort);
287 return tableSort.Skip((int)@skip).Take((int)@take).ToList();
288 }
289 }
290 catch (Exception ex)
291 {
292 Log.ErrorFormat("对指定实体进行查询，可以分页，可以排序出错：{0}", ex);
293 throw new ApplicationException("数据库查询失败");
294 }
295 });
296 }
297 /// <summary>
298 /// 对指定实体进行查询，可以分页，可以排序 倒序 Created by ZhangQC 2016.08.17
299 /// </summary>
300 /// <typeparam name="T"></typeparam>
301 /// <param name="entity"></param>
302 /// <param name="skip"></param>
303 /// <param name="take"></param>
304 /// <param name="where"></param>
305 /// <param name="sort"></param>
306 /// <returns></returns>
307 public static async Task<IEnumerable<T>> GetTableBySoryDescPageAsync<T>(this T entity, int? skip, int? take, Expression<Func<T, bool>> where = null,
308 Expression<Func<T, object>> sort = null) where T : class
309 {
310 return await Task.Run(() =>
311 {
312 try
313 {
314 using (var db = new Repository<T>(new EFContext().ContextRead))
315 {
316 var table = @where != null
317 ? db.DoQuery(@where)
318 : db.DoQuery();
319 if (@skip == null || @take == null)
320 return @sort != null ? table.OrderByDescending(@sort).ToList() : table.ToList();
321 //如果排序为null，那么就按实体其中的一个主键进行排序
322 if (sort == null)
323 {
324 var entitySet = db.EntitySet<T>();
325 var keyCollections = entitySet.ElementType.KeyMembers;
326 if (keyCollections.FirstOrDefault() == null)
327 {
328 throw new ApplicationException("要查询的表没有发现主键！");
329 }
330 //自动生成主键排序字段
331 var entityKey = keyCollections.Aggregate(string.Empty, (a, b) => a + b + " desc,").TrimEnd(',');
332 //排序后的IQuaryable
333 var tableSortNull = table.OrderUsingSortExpression(entityKey);
334 return tableSortNull.Skip((int)@skip).Take((int)@take).ToList();
335 }
336 var tableSort = table.OrderBy(@sort);
337 return tableSort.Skip((int)@skip).Take((int)@take).ToList();
338 }
339 }
340 catch (Exception ex)
341 {
342 Log.ErrorFormat("对指定实体进行查询，可以分页，可以排序出错：{0}", ex);
343 throw new ApplicationException("数据库查询失败");
344 }
345 });
346 }
347
348 #endregion
349
350 #region 保存数据
351 /// <summary>
352 /// 单个实体保存数据库时使用 Created by ZhangQC 2016.08.17
353 /// </summary>
354 /// <typeparam name="T"></typeparam>
355 /// <param name="entity"></param>
356 /// <returns></returns>
357 public static async Task<bool> SaveAsync<T>(this T entity) where T : class
358 {
359 return await Task.Run(() =>
360 {
361 try
362 {
363 using (var db = new Repository<T>(new EFContext().ContextRead))
364 {
365 db.Add(entity);
366 return db.Save() != 0;
367 }
368 }
369 catch (Exception ex)
370 {
371 Log.ErrorFormat("单个实体保存数据库时使用出错：{0}", ex);
372 return false;
373 }
374 });
375 }
376
377
378
379 /// <summary>
380 /// 实体集合新增或者更新数据库时使用 Created by ZhangQC 2016.08.17
381 /// </summary>
382 /// <typeparam name="T"></typeparam>
383 /// <param name="entityList"></param>
384 /// <returns></returns>
385 public static async Task<bool> SaveAsync<T>(this List<T> entityList) where T : class
386 {
387 return await Task.Run(() =>
388 {
389 try
390 {
391 using (var db = new Repository<T>(new EFContext().ContextRead))
392 {
393 db.AddOrUpdate(entityList.ToArray());
394 db.Save();
395 return true;
396 }
397 }
398 catch (Exception ex)
399 {
400 Log.ErrorFormat("实体集合新增或者更新数据库时使用:{0}", ex);
401 return false;
402 }
403 });
404 }
405 #endregion
406
407
408 #region 更新操作
409 /// <summary>
410 /// 更新实体数据(批量可以使用Sava（List《T》）方法) Created by ZhangQC 2016.08.17
411 /// </summary>
412 /// <typeparam name="T"></typeparam>
413 /// <param name="entity"></param>
414 /// <returns></returns>
415 public static async Task<bool> UpdateAsync<T>(this T entity) where T : class
416 {
417 return await Task.Run(() =>
418 {
419 try
420 {
421 using (var db = new Repository<T>(new EFContext().ContextRead))
422 {
423 db.Update(entity);
424 return db.Save() != 0;
425 }
426 }
427 catch (Exception ex)
428 {
429 Log.ErrorFormat("更新实体数据(批量可以使用Sava（List《T》）方法)出错：{0}", ex);
430 return false;
431 }
432 });
433 }
434 #endregion
435
436 #region 删除操作
437 /// <summary>
438 /// 删除操作 Created by ZhangQC 2016.08.17
439 /// </summary>
440 /// <typeparam name="T"></typeparam>
441 /// <param name="entity"></param>
442 /// <returns></returns>
443 public static async Task<bool> DeleteAsync<T>(this T entity) where T : class
444 {
445 return await Task.Run(() =>
446 {
447 try
448 {
449 using (var db = new Repository<T>(new EFContext().ContextRead))
450 {
451 db.Delete(entity);
452 return db.Save() != 0;
453 }
454 }
455 catch (Exception ex)
456 {
457 Log.ErrorFormat("出错：{0}", ex);
458 return false;
459 }
460 });
461 }
462
463 /// <summary>
464 /// 删除操作 Created by ZhangQC 2016.08.17
465 /// </summary>
466 /// <typeparam name="T"></typeparam>
467 /// <param name="entity"></param>
468 /// <returns></returns>
469 public static async Task<bool> DeleteAsync<T>(this IQueryable<T> entity) where T : class
470 {
471 return await Task.Run(() =>
472 {
473 try
474 {
475 using (var db = new Repository<T>(new EFContext().ContextRead))
476 {
477 db.Delete(entity);
478 return db.Save() != 0;
479 }
480 }
481 catch (Exception ex)
482 {
483 Log.ErrorFormat("出错：{0}", ex);
484 return false;
485 }
486 });
487 }
488
489
490 /// <summary>
491 /// 批量删除操作 Created by ZhangQC 2016.08.17
492 /// </summary>
493 /// <typeparam name="T"></typeparam>
494 /// <param name="entity"></param>
495 /// <returns></returns>
496 public static async Task<bool> DeleteAsync<T>(this IEnumerable<T> entity) where T : class
497 {
498 return await Task.Run(() =>
499 {
500 try
501 {
502 using (var db = new Repository<T>(new EFContext().ContextRead))
503 {
504 db.Delete(entity);
505 return db.Save() != 0;
506 }
507 }
508 catch (Exception ex)
509 {
510 Log.ErrorFormat("出错：{0}", ex);
511 return false;
512 }
513 });
514 }
515
516
517 #endregion
518 }
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