The ADO.NET Entity Framework is a set of ORM (Object-Relational-Mapping) tools for the .NET Framework, since version 3.5 SP1.

learn more… | top users | synonyms

2
votes
1answer
44 views

Automating CRUD using Repository Pattern, Web API and TypeScript

I would like a review of the following application, esp with how I'm registering and selecting the controllers. First I defined a generic Repository interface and implementation using EF 6.1.2: ...
2
votes
1answer
36 views

Calling Stored Procedure “insert query” using EF 6, UOW, and MVC 5

I'm a beginner in MVC programming, repository, and UOW using Entity framework. I tried to calling my existing SP in my MVC project using UOW and EF. Here is my code to mapping my SP in myDbContext ...
2
votes
1answer
34 views

Creating users with different roles using .Net Identity 2.0 within Entity Framework

I am using .Net Identity 2.0 with Entity Framework 6.0. I have a Person class inheriting IdentityUser. I have a ...
3
votes
2answers
44 views

Eager load additional data about some instructors

Below is a snippet of code of a little practice project. I am still pretty new to EF and I was wondering if there is a way to write the below statement so that all required data is eager loaded since ...
2
votes
0answers
51 views

Optimizing a Query in Entity Framework

I'm wondering what can be done to optimize the following. I've tried to note the points at which most of the overhead is occurring. The main two points I see are The call to DiffDays from within ...
1
vote
1answer
63 views

Asynchronous method and collection binding

I have a WPF application, in which I'd like to bind a collection to a combobox using an asynchronous method : ...
-1
votes
1answer
52 views

Reducing database access time and connection count [closed]

I have 2 connections. How can I reduce this to one connection? ...
0
votes
1answer
49 views

EF Code First Seed Method for States/Countries Part I

I am working to complete this even further, but here's what I've got thus far... (See my other post for the definition.) ...
1
vote
2answers
59 views

EF Code First Identity/Info Storage

I've built this EF for storing data for web scraping. Any ideas? What am I missing? ...
2
votes
1answer
97 views

Single Responsibility + Entity Framework

I still feel like I struggle to grasp some concepts of SOLID principles at times, and am hoping for some clarification here. The following classes are entities in an Entity Framework project. ...
4
votes
2answers
144 views

Query results with many to many and some parameters using Entity Framework in a more efficiënt way

I've created a working query in Entity Framework and I'm curious if there's a better way to do this. Since there's a lot of field on my models, I will only publish the relevant ones here. My Models ...
4
votes
2answers
121 views

Class to DataTable or Datatable to class mapper

My code goes from a class to DataTable, and back again. It populates the class's public properties, or creates DataColumns whose ...
3
votes
1answer
44 views

Handling CRUD for look-up tables

I'm creating the admin portion of a project. Specifically, I am wanting to allow the users to update the look-up tables for their areas of interest. All of my look-up tables have the same structure: ...
5
votes
2answers
122 views

EF GroupBy query optimization

I have this method: ...
3
votes
1answer
36 views

Bottleneck encountered returning records for my grid

I am using MVC 4.0/C#/EF4.0 and I have a grid page that grabs results that are filtered, sorted and paged. It's filtering results from a table that has 45,000 records. How do I improve performance? ...
5
votes
2answers
720 views

Unit of work Repository pattern DBcontext EF-Entities and ninject

I am totally confused while implementing Repository pattern with unit of work and Entity framework because I have seen tons of examples. Please suggest whether I am on the right track or not. ...
3
votes
1answer
116 views

Asynchronous task and close sql connection

The following code compiles correctly: ...
2
votes
2answers
162 views

Returning latest database ID

I want my method to use a finally block so I can be ure that my EF entity is disposed after usage, even if an exception is thrown, but I would also like to not ...
3
votes
3answers
139 views

Generic repository pattern

Please have a through look my custom implementation of generic repository pattern and suggest anything I may be lacking. I am using a generic interface with 6 methods I'll be using a repository ...
5
votes
1answer
139 views

Splitting code into separate methods and avoiding the Unit Of Work / Repository pattern

Take a look a this service method: ...
3
votes
1answer
55 views

Parent with N-Childs where each child can have N-Childs

I know my question sounds strange but I have a situation in which I have Parent Data which can have 'N' Childs and each child can further have N-Childs and so on. So its Like. Parent a. Child ...
3
votes
3answers
70 views

Account inactivity reminder

I wanted to know if this is the best approach for the Single Responsibility Principle. The responsibility of this class is to remind users whose accounts are about to expire due to inactivity. On ...
1
vote
0answers
105 views

WPF Binding to a Repository with Entity-Framework

I have an MVVM WPF application that will make use (hopefully) with a repository and ...
0
votes
2answers
105 views

Safe DbContext Disposal

I have a service class called ClientService, the service class is called using an interface IClientService. The service class ...
2
votes
0answers
81 views

Supporting Enum in EF 5 with .Net 4.0 (Visual Studio 2010)

I'm currently working through Getting Started with EF5 using MVC 4 in Visual Studio 2010 (.NET 4.0) to learn about how to use ASP.NET and Entity Framework. During the beginning of the tutorial I ran ...
3
votes
1answer
197 views

Insert missing records in a list with LINQ

We have a table with periods, and other child tables with these periods and values for combinations of product + location. Based on selected periods, I would like to add any missing rows in the child ...
5
votes
2answers
583 views

EF6 Code First unit of work pattern with IoC/DI

I'm trying to implement the unit of work pattern with dependency injection / inversion of control and entity framework version 6.1.1 Code First, in an asp.net-mvc project. ...
2
votes
1answer
270 views

ComponentManager - Entity-Component-System architecture in C++

Lately I've been working on a small C++ Entity-Component-System framework. Like most other ECS frameworks the internal data is presented as a table where an entity is a simple row index and each ...
25
votes
2answers
631 views

KISS my… unit of work

I've seen many, many UoW+Repository implementations. Whenever one was built on top of Entity Framework, I'd cringe at the added complexity. Sure the complexity buys you (sometimes) full decoupling ...
3
votes
1answer
92 views

Find the number of Colleges offering Combinations of Levels: Performance

I have been using entity framework 5 as DataAccess layer for my application. I have a case where there are a set of Levels offered. And I have a set of ...
2
votes
2answers
110 views

Database mirroring cache

I generally prefer to work with EF by specifying exactly the data to fetch from the DB with regards to Navigation Properties/Lookups and the like, so we wrote this cache system to limit the number of ...
2
votes
0answers
310 views

Generic Entity Framework Query in CQRS

I've been working on our application (CQRS and DDD) for awhile now. The application architecture is well layered and thought through. However we are having difficulties in decide where to put the ...
3
votes
1answer
332 views

Updating Related Data the MVC/EF Way

I have an ASP.NET MVC Controller, the relevant parts of which appear here: ...
11
votes
2answers
256 views

Concerns about the correctness of my Repository and Controller tests

Lately I have been researching how to best unit test an EF repository and given a properly tested repository, what to test in the controller. My research did not reveal many sound examples or ...
6
votes
2answers
121 views

Concerns about my repository implementation

I have a repository called PostsRepository: ...
1
vote
1answer
773 views

Dynamic Linq from string with EF

I wrote an EF browser to dynamically navigate through entities. Beside basic properties of system types, each entity can have several singular or plural navigation properties. In order to support all ...
1
vote
4answers
95 views

Checking if there are tags or categories in the database

The code below is used to check if there are tags or categories in the database. If they exist, they are not added to the database, otherwise they are added. Is this code efficient and easy to read? ...
2
votes
1answer
63 views

Can this method be changed to remove all objects in one call?

I am converting a VB.NET app over to C#. I won't subject you to the old code but the following is done in a little over 100 lines using nested loops. I am using Entity Framework 6 as my ORM. I have ...
3
votes
1answer
84 views

Data model for tracking currency in a safe [closed]

I am attempting to design an application that tracks currency and recent transactions in a safe. I am using entity-framework code-first in a wpf desktop application. The first goal is to be able to ...
2
votes
1answer
277 views

Is there better way to shorten this Lambda expression's result selector?

I'm new in LINQ and Lambda expression. I'm not sure is there a way to shorten the result on this o.z.cust.cust.cust.bintAccountNo. As you can see below, the more ...
10
votes
2answers
2k views

Do I need ninject when implementing DAL with generic repository and unit of work?

I am implementing generic repository and unit of work for the first time. I would be glad if someone can correct me if I am doing something wrong here. This is how I communicate with my DAL from ...
1
vote
1answer
136 views

Concept for saving context information

My Problem I have a library containing business logic which is being used from 3 different projects: Website Local WPF Application WCF Service The library uses Entity Framework and a connection ...
7
votes
4answers
521 views

Basic Entity Framework Repository implementation

Here is simple repository pattern that I use to access data in my database. I would like some advice on how to improve this code. Commenting on my code quality is also welcome too! ...
1
vote
2answers
2k views

Update multiple records with Entity Framwork

I am wondering what the best way to update multiple records with Entity Framework is. This is how I normally do it, and it does work: ...
3
votes
1answer
166 views

Entity Framework - updating two different arrays of child associations

Exercises have Muscles and Tools. When someone adds or updates an ...
10
votes
1answer
530 views

EF6-Lambda Expressions deep big-tree query

I am looking to improve the following query. We are using EF6 (CodeFirst) and C# Lambda Expressions, and Repository/Unit of Work patterns. Also, we needed to restrict the query in a way that we ...
2
votes
4answers
429 views

Silent Try_catch in high load socket server or not?

I'm working on a socket application that will listen to incoming messages from about 400 devices. They all send a message at least once per minute. Now I have a working program and it has been running ...
5
votes
1answer
72 views

EF query for calculating monthly trends

My application has a fairly important query that is used in a lot of places. Unfortunately it takes about 14 seconds to run, so I'd like to find a way of possibly improving it. The application ...
2
votes
1answer
172 views

Refactor Oracle Entity Framework lambda query

I had a ugly problem and wrote an ugly query. Query creates a cache that is used to get person id when I have {full_name, id_code?, birth_date?}. By question mark I mean that it is perfectly valid ...
5
votes
2answers
344 views

Static Data Helper for an Oracle Backend

What I would like to do is have a method call like: ...