ChuckLu - 博客园

2022年8月23日

摘要： EFCore Map 2 entities to same table 问题 I'm trying to use DDD with EFCore and I am struggling to find a way to map 2 POCOs from different context that 阅读全文

posted @ 2022-08-23 13:45 ChuckLu 阅读(73) 评论(0) 推荐(0)

AutoMapper Explicit expansion

摘要： Explicit expansion In some scenarios, such as OData, a generic DTO is returned through an IQueryable controller action. Without explicit instructions, 阅读全文

posted @ 2022-08-23 12:18 ChuckLu 阅读(63) 评论(0) 推荐(0)

2022年8月22日

When to use Include in EF? Not needed in projection?

摘要： When to use Include in EF? Not needed in projection? I have the following in Entity Framework Core: public class Book { public Int32 Id { get; set; } 阅读全文

posted @ 2022-08-22 18:12 ChuckLu 阅读(48) 评论(0) 推荐(0)

What does Include() do in LINQ?

摘要： What does Include() do in LINQ? 问题 I tried to do a lot of research but I'm more of a db guy - so even the explanation in the MSDN doesn't make any sen 阅读全文

posted @ 2022-08-22 18:07 ChuckLu 阅读(39) 评论(0) 推荐(0)

2022年8月18日

SqlServer备份还原出现操作系统错误 5(拒绝访问) 的解决方案

摘要： An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) Cannot open backup device 'C:\Users\clu\ 阅读全文

posted @ 2022-08-18 14:05 ChuckLu 阅读(2413) 评论(0) 推荐(0)

AutoMapper Queryable Extensions

摘要： Queryable Extensions When using an ORM such as NHibernate or Entity Framework with AutoMapper’s standard mapper.Map functions, you may notice that the 阅读全文

posted @ 2022-08-18 12:10 ChuckLu 阅读(71) 评论(0) 推荐(0)

2022年8月17日

Entity Framework Classic Include

摘要： Entity Framework Classic Include The Include method lets you add related entities to the query result. In EF Classic, the Include method no longer ret 阅读全文

posted @ 2022-08-17 14:16 ChuckLu 阅读(37) 评论(0) 推荐(0)

Using Automapper to improve performance of Entity Framework

摘要： https://docs.automapper.org/en/stable/Queryable-Extensions.html ProjectTo must be the last call in the chain. ORMs work with entities, not DTOs. So ap 阅读全文

posted @ 2022-08-17 14:11 ChuckLu 阅读(72) 评论(0) 推荐(0)

Plain Old CLR Object vs Data Transfer Object

摘要： Plain Old CLR Object vs Data Transfer Object POCO = Plain Old CLR (or better: Class) Object DTO = Data Transfer Object In this post there is a differe 阅读全文

posted @ 2022-08-17 13:55 ChuckLu 阅读(50) 评论(0) 推荐(0)

When should I use the HashSet<T> type?

摘要： When should I use the HashSet<T> type? I am exploring the HashSet<T> type, but I don't understand where it stands in collections. Can one use it to re 阅读全文

posted @ 2022-08-17 13:39 ChuckLu 阅读(31) 评论(0) 推荐(0)

Chuck Lu

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