Showing results for Entity Framework - .NET Blog Oct 21, 2024 Post comments count1 Post likes count4 MongoDB EF Core Provider: What’s New? Rishit, Luce The latest updates to the MongoDB EF Core Provider brings updates to change tracking, index creation, complex queries, and transactions....
publicclassAddress { publicstringFirstName {get;set; } publicstringLastName {get;set; } publicstringAddr {get;set; } publicstringStreet {get;set; } publicstringCity {get;set; } publicstringZipCode {get;set; } publicstringEmail {get;set; } publicstringPhone {get;set; } publicstringState ...
Compiling the expression tree into SQL involves some overhead, though, particularly for more complex queries. To avoid having to pay this performance penalty every time the LINQ query is executed, you can compile your queries and then reuse them. The CompiledQuery class allows you to pay the ...
nat.Configure(n=> n.Property(p => p.ta2.token).HasColumnName("ta2_token")); complex 不可以是null , 你至少也要它一个空的对象。不然会 saveChange error的, EF 以后可能会支持。 更新: 2016-09-03 突发奇想,以为可以这样设定名字(本来是 address_text, 我希望变成 adminAddress_text), 很可惜不...
The documentation also warns that using query paths with Include could result in very complex queries at the data store because of the possible need to use numerous joins. As the model becomes more complex, the potential for trouble increases. You could certainly balance the pros and cons by ...
不管怎样,有人按捺不住,写了一个扩展组件EntityFramework.Extended,可以通过NuGet获取,可参看Entity Framework Batch Update and Future Queries。现在我们可以这样: 1[TestMethod]2publicvoidTestMethod4()3{4using(varentities =newDistributionEntities())5{6entities.Stock.Delete(o => o.Quantity ==0);7}8}...
Entity Framework is a modern object-relation mapper that lets you build a clean, portable, and high-level data access layer with .NET (C#) across a variety of databases, including SQL Database (on-premises and Azure), SQLite, MySQL, PostgreSQL, and Azure
EF Core 6.0 Release Candidate 1 was released to NuGet a few weeks ago. This release is the first of two “go live” release candidates that are supported in production. EF Core 6.0 RC1 runs on Release Candidate 1 for .NET 6.0, which also has a “go live” license. ...
some cases convenient, and forInclude()it even helped avoid sending redundant data over the wire, the implementation was complex, and it resulted in some extremely inefficient behaviors (N+1 queries). There were situations in which the data returned across multiple queries was potentially ...
With the Entity Framework there is another way to express queries, which not only allows you to use other languages, but also provides additional benefits that you can take advantage of as necessary. It’s called Entity SQL, and you will learn much more about it and LINQ to Entities in ...