Recent questions tagged Entity

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entity framework - Visual Studio 2015 Update 2 breaks EF reverse code engineer vsix

After installing the latest Visual Studio 2015 Update 2, the EF power tools reverse code engineer option fails ... installer version. Help! See Question&Answers more detail:os...

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

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508 views

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entity framework - Get the name of a class as a string in C#

Is there a way to take a class name and convert it to a string in C#? As part of the Entity Framework, ... () without an instance. Any ideas? See Question&Answers more detail:os...

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

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457 views

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entity framework - Building dynamic where clauses in LINQ to EF queries

I'm trying to build a where clause dynamically in a LINQ query which references tables via EF, but I'm getting the ... == "Denied" }).ToList(); See Question&Answers more detail:os...

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

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557 views

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entity framework - How to construct a dynamic where filter in EF.Core to handle equals, LIKE, gt, lt, etc

Please how do we construct a dynamic where filter in EF.Core to handle: Query.Where(fieldName, compareMode, value) I ... )total / limit); } } See Question&Answers more detail:os...

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

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586 views

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entity framework - Get the name of a class as a string in C#

Is there a way to take a class name and convert it to a string in C#? As part of the Entity Framework, ... () without an instance. Any ideas? See Question&Answers more detail:os...

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

0 votes

560 views

1 answer

entity framework - Building dynamic where clauses in LINQ to EF queries

I'm trying to build a where clause dynamically in a LINQ query which references tables via EF, but I'm getting the ... == "Denied" }).ToList(); See Question&Answers more detail:os...

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

0 votes

728 views

1 answer

entity framework - How to construct a dynamic where filter in EF.Core to handle equals, LIKE, gt, lt, etc

Please how do we construct a dynamic where filter in EF.Core to handle: Query.Where(fieldName, compareMode, value) I ... )total / limit); } } See Question&Answers more detail:os...

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

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604 views

1 answer

entity framework - On Insert / Update logic in EF code first

I would like to add some logic to the insert and update events of some EF objects. I have a MVC application ... such thing using EF code first? 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

1 answer

entity framework - Get the EntitySet name from an EntityType in EF

Given an EntityType, such as "Contact", how can I derive from it the name of the EntitySet it would ... pluralization such as "Contacts"? See Question&Answers more detail:os...

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

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1.0k views

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entity framework - An error occurred while executing the command definition. See the inner exception for details

In my mvc asp.net application, I am getting an error in edit function : in given code public ActionResult Edit(int ... error? How do I fix it? See Question&Answers more detail:os...

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

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624 views

1 answer

entity framework - EF4 - update [Table] set @p = 0 where

While going through SQL profiler, I noticed the following query generated by EF4. exec sp_executesql N'declare ... ,@0=1,@1=0x00000000000007D3 See Question&Answers more detail:os...

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

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756 views

1 answer

entity framework - How to merge two C# Lambda Expressions without an invoke?

I'd like to merge the following Expressions: // example class class Order { List<OrderLine> Lines } class OrderLine { ... 0; How can I do this? See Question&Answers more detail:os...

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

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594 views

1 answer

entity framework - EntityFunctions.TruncateTime and unit tests

I'm using System.Data.Objects.EntityFunctions.TruncateTime method to get date part of a datetime in my query: if ( ... I unit test my query? See Question&Answers more detail:os...

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

0 votes

668 views

1 answer

entity framework - Recreate and Reseed LocalDb Before Each Unit Test

I'm attempting to write unit/integration tests for my ASP.NET Web API project and struggling to run each test ... my database before each test. See Question&Answers more detail:os...

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

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568 views

1 answer

entity framework - How do i delete single record from table using EF 6.1.1

I am using Entity Framework 6.1.1. I am deleting single record from table as following but i am not ... stuDetails); _context.SaveChanges(); } See Question&Answers more detail:os...

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

0 votes

871 views

1 answer

entity framework - Convert datetime to a formatted string inside a LINQ-to-entities query

How can I convert DateTime into a formatted string? This is the line in the following query that needs ... translated into a store expression. See Question&Answers more detail:os...

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

0 votes

491 views

1 answer

entity framework - Using Unity, how do you register type mappings for generics?

I'm trying to implement a repository solution for Entity Framework but I am having trouble registering the types ... typeof(UnityRepository<>)); See Question&Answers more detail:os...

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

0 votes

659 views

1 answer

entity framework - JSON.Net JsonConverter for DbGeography

Long long struggles with this... Basically I have a model-first EF5 object with a DbGeography property. I ... the property but a SqlDouble? See Question&Answers more detail:os...

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

0 votes

442 views

1 answer

entity framework - Getting a count of returns seen by a RESTful request

So, I'd like to know how many results I'll be getting back from a RESTful uri GET request. I don't know of ... that isn't what I'm looking for. See Question&Answers more detail:os...

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

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1.0k views

1 answer

entity framework - How do I implement DbContext inheritance for multiple databases in EF7 / .NET Core

I am building web APIs in ASP.NET Core 1.1. I have a number different databases (for different systems ... clean or transparent as inheritance. See Question&Answers more detail:os...

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

0 votes

520 views

1 answer

entity framework - Why does EF 4.1 not support complex queries as well as linq-to-sql?

I am in the process of converting our internal web application from Linq-To-Sql to EF CodeFirst from an existing ... in EF than in L2S? See Question&Answers more detail:os...

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

0 votes

565 views

1 answer

entity framework - Best Practices to localize entities with EF Code first

I am developing a domain model using EF Code First to persist the data. I have to add support for multilanguage ... knows how to get this? See Question&Answers more detail:os...

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

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564 views

1 answer

entity framework - Generic repository to update an entire aggregate

I am using the repository pattern to provide access to and saving of my aggregates. The problem is the updating ... could I do this generically? See Question&Answers more detail:os...

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

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634 views

1 answer

entity framework - Using .Find() & .Include() on the same query

I have the following method automatically generated from the scaffold template with repository:- public Group Find(int id ... of using .Where()? See Question&Answers more detail:os...

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

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669 views

1 answer

entity framework - EF Code First Fluent API specifying the Foreign Key property

I have a class AgentBalance with an association to Agent, thus: public class AgentBalance { ... public int AgentId ... the fluent API mapping). See Question&Answers more detail:os...

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

0 votes

863 views

1 answer

entity framework - Can I get decode an EntityFramework Model from a specified migration?

Apparently IMigrationMetadata.Target encodes the state of the EF model. Can I use this to reconstruct the model for a particular migration? See Question&Answers more detail:os...

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

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1.2k views

1 answer

entity framework - The connection string 'MyConnection' in the application's configuration file does not contain the required providerName attribute."

I use Entity Framework Code First, My connection string is in a configuration file: <connectionStrings> <clear/> <add ... ." What am I missing? See Question&Answers more detail:os...

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

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584 views

1 answer

entity framework - Can EntityFramework support an EAV model?

Can EntityFramework support an EAV model? Is this a workable scenario, or a nightmare? I want to use an ... two philosophies are in conflict. See Question&Answers more detail:os...

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

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