entity

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"An item with the same key has already been added" error when calling Context AddObject

Can somebody please help me with this error. I have an ASP.NET WebApp, within the Entity Model I have an entity called tb_AdminUser, with a UserID property as GUID. This is also the Entity Key. The en[详细]

2023-03-15 21:36 分类：问答
Entity Framework Find By Example?

Coming from a Java background with ORM\'s it seems that all of them always had a FindByExample (KODO, Hibernate, etc).I have been surprised that I haven\'t been able to find the same in EF.I am using[详细]

2023-03-15 20:25 分类：问答
Defining Primary Key for entity CodeFirst Ef4

I want to define a primar开发者_开发技巧y key for a POCO entity but i dont want to decorate the entity with primary key attribute i wanna define that from the context class which extend DbContext[详细]

2023-03-15 15:40 分类：问答
why Entity framework Entity Master Details Entity Edit

I work with on MVC project using entity framework with repository and Unit of work pattern, I\'m trying to edit variable length collection in edit action(master details) like example in this posthttp:[详细]

2023-03-15 05:58 分类：问答
Is Entity framework 4.0 is generating effective queries?

I am using entity framework 1.0 and not satisfied with the generated queries by it. Even a small query length is more 开发者_运维百科then 100 line after generation. Can any one update that in entity f[详细]

2023-03-14 20:27 分类：问答
ObjectStateManager does not contain an ObjectStateEntry with a reference to an object of type

I am using EISK (Employee Info Starter Kit) to develop an application. My entity diagram looks like thisI try to update the application table via this code.[详细]

2023-03-14 13:26 分类：问答
Entity Framework code first not working

I have a Class like this: class ClassA { public long classAID {get; set;} public string Description {get; set;}[详细]

2023-03-14 13:03 分类：问答
Silverlight using Entity to LINQ on Joins

I have the following code 开发者_开发百科which works and gets me the data for a single entity.[详细]

2023-03-13 20:28 分类：问答
Why cannot Hibernate find secondary table in an Entity?

I found no answers to this question which is also asked on many other forums. Although I have the tables IAS_FORM_BKT_BAYI and IAS_FORM_BKT_BAYI_SO present in the database, with the annotated enti[详细]

2023-03-13 19:38 分类：问答
JPA 2.0: Adding entity classes to PersistenceUnit *from different jar* automatically

I have a maven-built CDI-based Java SE app, which has a core module, and other modules. Core has the persistence.xml and some entities.[详细]

2023-03-13 09:26 分类：问答