entity-framework Archives - Page 2 of 7

I have a project that uses Entity Framework. While calling SaveChanges on my DbContext, I get the following exception: System.Data.Entity.Validation.DbEntityValidationException: Validation failed for ...

May 26, 2022
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C#, Programming

IT Nursery

“A lambda expression with a statement body cannot be converted to an expression tree”

In using the EntityFramework, I get the error “A lambda expression with a statement body cannot be converted to an expression tree” when ...

May 26, 2022
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MSSQL Error ‘The underlying provider failed on Open’

I was using an .mdf for connecting to a database and entityClient. Now I want to change the connection string so that there ...

May 24, 2022
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How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?

Let’s just suppose I have a valid need for directly executing a sql command in Entity Framework. I am having trouble figuring out ...

May 24, 2022
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Entity Framework 6 Code first Default value

is there “elegant” way to give specific property a default value ? Maybe by DataAnnotations, something like :...

May 23, 2022
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Should services always return DTOs, or can they also return domain models?

I’m (re)designing large-scale application, we use multi-layer architecture based on DDD. We have MVC with data layer (implementation of repositories), domain layer (definition ...

May 22, 2022
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