Chuck Lu

摘要： EF join 两张表： var query = db.Categories // 第一张表 .Join(db.CategoryMaps, // 第二张表 c => c.CategoryId, // 主键 cm => cm.ChildCategoryId, // 外键 (c, cm) => new 阅读全文

摘要： What difference does .AsNoTracking() make? 问题 I have a question regarding the .AsNoTracking() extension, as this is all quite new and quite confusing. 阅读全文

摘要： Is automapper preventing lazy loading with EF? 问题 I have been using an AutoMapper and it seems that it gets me all the child entities (even if I don't 阅读全文

摘要： Prevent properties being loaded unless specifically requested 回答1 The problem source This isn't an EF behavior, it's an Automapper behavior. public IQ 阅读全文

摘要： Evaluate: lim x → 0 [1/x^2 - 1/sin^2x] L = lim x → 0 [1/x2 - 1/sin2x]. [∞ – ∞] formRead more on Sarthaks.com - https://www.sarthaks.com/354486/evaluat 阅读全文

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

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

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

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

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