Recent questions tagged Entity

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entity framework - Why DbContext doesn't implement IDbContext interface?

Why there is no IDbContext interface in the Entity Framework? Wouldn't it be easier to test things if there was an ... > SomeEntities { get; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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625 views

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entity relationship - PHP, Yii2 GridView filtering on relational value

Following on from this: Yii2 how does search() in SearchModel work? I would like to be able to filter a ... help would be appreciated. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

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entity framework 4 - using Guid as PK with EF4 Code First

I have this class and table: public class Foo { public Guid Id {get;set;} public string Name {get;set; ... exception anybody knows a fix ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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509 views

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entity framework 4 - How to specify database name in Code First?

How do I tell EF what to name the database and where to put it? If there is no connection string in the ... it what I want. Any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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entity framework - adding a foreign key with Code First migration

I have an error when trying to update my database after adding a migration. Here are my classes before add- ... my migrations back to normal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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525 views

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entity framework - How do I undo the last Add-Migration command?

I have created a migration using the Add-Migration command, but I'd like to change the name of that migration. How ... this could be a bad idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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498 views

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entity framework - Using SQL Server 2008 and SQL Server 2005 and date time

I've built a entity framework model against a 2008 database. All works ok against the 2008 database. When I try ... "datetime" in the database. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

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entity framework - What specific issue does the repository pattern solve?

(Note: My question has very similar concerns as the person who asked this question three months ago, but it was ... the right sources... : See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

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entity framework - Does inserting data into SQL Server lock the whole table?

I am using Entity Framework, and I am inserting records into our database which include a blob field. The ... or anything like that. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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833 views

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entity framework - EntityFramework: using a view to extend a table

I'd like to use a view to add information to a table like this public class PocoTable { public int Id { get; ... can I do this some other way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

1 answer

entity framework 4 - EF4 Code First create new table

Is there a way when i add a new entity to my Code First configuration the table gets automatically added so i ... my DB with new tables? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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455 views

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entity framework 4.1 - EF 4.1 Code First: Why is EF not setting this navigation property?

Here's a sample scenario that illustrates the problem I am having. Here is the DB script to generate the ... kept synchronized by the framework. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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726 views

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entity framework - Add Column Name Convention to EF6 FluentAPI

This question was asked here 4 years ago: EF Mapping to prefix all column names within a table I'm hoping ... out column names for every column See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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640 views

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entity framework - Linq Order by when column name is dynamic and pass as a string to a function

I have a Linq (Entity Framework) Query as function getData(string col_to_sort , bool IsAscending , int pageNo , ... ? Any help is appreciated See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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625 views

1 answer

entity framework - Storing a complex detached object graph in EF6

I have the current scenario: I'm using EF6 Code first, and have created a data-model something like ... smoother would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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830 views

1 answer

entity framework - How did I solve the Json serializing circular reference error?

There is post here that asks how to solve the circular reference error when returning a serialized object via EF4 ... I am stumped. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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908 views

1 answer

entity framework - Can I use C# string interpolation with Linq to SQL

While using EF (up to version 6.1.3 at least) assuming you have a class like this: class Customer { public string ... is it sure it won't work? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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576 views

1 answer

entity framework 4 - EF 4 Code First: Model compatibility cannot be checked because the EdmMetadata type was not included in the model

I am trying to use EF 4 Code First pattern. My initialization code is as follows: Create Model Builder: private ... but I still get the error. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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593 views

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entity framework - How to map a protected property in EF 4.3 code first

In EF 4.3 documentation says: By default, building a database using Code First does not include private, ... , espically using fluent API? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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815 views

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entity framework - Database.SqlQuery calling stored procedure that has multiple output parameters

I have a stored procedure like below which takes 1 input parameter ( Name ) and returns 2 output parameters( ... properties I must give here } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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647 views

1 answer

entity framework - Delete parent with children in one to many relationship

I have a .NET4.0 application with Entity Framework 5.0 e Sql Server CE 4.0. I have two entities with a ... must be a better solution than that. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

1 answer

entity framework core - Is it possible to add CHECK constraint with fluent API in EF7?

Is it possible to add CHECK constraint with fluent API in Entity Framework 7? I need to acheive something like this: ... only (at least now). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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588 views

1 answer

entity framework core - EFCore Map 2 entities to same table

I'm trying to use DDD with EFCore and I am struggling to find a way to map 2 POCOs from different ... already mapped to 'UserContext.User'. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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733 views

1 answer

entity framework 6 - Invalid object name 'dbo.__MigrationHistory' using Database.Create; EF6.02 when connection string is passed in

I experience an error when trying to create a database using the following code. Note the problem ... CommandBehavior behavior) InnerException: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

1 answer

entity framework - Creating entities from stored procedures which have dynamic sql

I have a stored procedure which uses a couple of tables and creates a cross-tab result set. For creating the ... Any help would be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

937 views

1 answer

entity framework - Offset/Fetch based paging (Implementation) in EntityFramework (Using LINQ) for SQL Server 2008

I am using SQL Server 2008 and Entity Framework 6.1.3. I wish to implement pagination of data based on OFFSET/FETCH ... Server 2008 and EF 6.1.3 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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636 views

1 answer

entity framework - How to add an index on multiple columns with ASC/DESC sort using the Fluent API?

I have a MVC ASP.NET application using Entity Framework 6 - Code First approach. Using the Fluent API, how ... DateFor(Desc), DateCreated(Desc). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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707 views

1 answer

entity framework 4.1 - Triggering EF migration at application startup by code

Using Entity Framework Migrations (Beta1), using Update-Database command is all good during development. But when ... ? Documentation is scarce. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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