I have relatio开发者_开发知识库nship 1 to many and want to check business rules in scope of update.
I\'m using EF 4.1 Code First, and I\'m making a configurable utility for parsing/importing large delimited files.Each row in the file may contain data for several entities.
I have an ASP.NET MVC 3 app that is using SQL Server CE 4.0 and Entity Framework 4.1 Code First. It works fine locally, but in production, it fails with the following er开发者_运维百科ror:
We are trying to find a workaround for the issue that the Entity Framework doesn\'t support non-scalar entities. We are using a particular equality so we try to build an expression that for a given in
I\'m developing a data access layer for a database with over 700 tables. I created the model including all the tables, which generated a huge model. I then changed the model to use DBContext from 4.1
I have a table which has a few columns, one of which is an FK ID of the \"owner\". In my delete statement, I have the following code:
I have a simple base entity type called EntityBase that implements IEquatable<EntityBase>. I\'ve used this code outside of LINQ to Entities (with EF 4.1) to filter a list of types derive
I am using Entity Framework 4.1. What fluent api method开发者_开发技巧 is correspond to 1678280971 attribute in Data Annotations API to check concurrency?If you have class like this:
I am trying to establish a many-to-one relationship. The entity that represents the “many” has a navigation property pointing back to the parent entity. It looks like this:
I\'ve been looking at Applying filters when explicitly loading related entities and could not get it to work for a many-to-many relationship.
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