SqlHelper简单实现（通过Expression和反射）10.使用方式

以下是整个SqlHelper的Demo：

 1         public Result<List<ArticleDTO>> GetIndexArticleList(int count, int userID)
 2         {
 3             var exp = DbUtilityFactory.GetDbUtility().GetSqlExpression<ArticleEntity>();
 4             exp.Where(a => a.userID == userID);
 5             exp.OrderByDescending(a=>a.articleDate);
 6             var data = DbUtilityFactory.GetDbUtility().Paged<ArticleEntity>(a=>a.articleDate,1,6);
 7             if(data.Any())
 8             {
 9                 return new Result<List<ArticleDTO>>()
10                 {
11                     IsSuccess = true,
12                     ReturnMessage = "成功",
13                     ReturnValue = data.Select<ArticleEntity, ArticleDTO>(a => new ArticleDTO()
14                     {
15                         articleAbstract = a.articleAbstract,
16                         articleDate = a.articleDate,
17                         articleID = a.articleID,
18                         articleTitle = a.articleTitle
19                     }).ToList()
20                 };
21             }else
22             {
23                 return new Result<List<ArticleDTO>>()
24                 {
25                     IsSuccess = false,
26                     ReturnMessage = "没有记录"
27                 };
28             }
29         }

 

 比如在运行到第5行exp.OrderByDescending(a=>a.articleDate)时：

这里就是实现了Lambda到sql的转换。

 

完整Demo地址：https://github.com/Racpheal/Construction.git

 

posted on 2016-11-28 14:39  Kakura  阅读(696)  评论(1)  编辑  收藏  举报

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