Questions tagged [entity-framework]

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

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3
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0answers
494 views

Deriving classes to decorate auto-generated base class code with attributes

Background: I am currently in the process of abstracting and refactoring out EF for Dapper with ...
4
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2answers
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Search for variants of keywords using LINQ

First, I'm adding words entered into a search field to an array. Then, I'm getting results from a stored procedure on SQL Server using Database First approach with Entity Framework. Finally, for ...
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2answers
558 views

Entity Framework configuration

I tried to refactor my code with entity framework configuration, splitting in multiple private methods, one per entity, each responsible for configuring things related to that entity and only that ...
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1answer
2k views

Localized Enum in C# 6

I had to jump through some hoops to get a localized enum working. I went through dozens of SO articles that never actually answered the relevant conundrum with a working solution. So I made my own: I ...
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2answers
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Controller method to update properties of a request

I have a view that displays details of a work order request submitted by a user. As far as security and database querying is concerned, which one of the following options would be better if I'm going ...
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1answer
759 views

Specification pattern in EF part 2

This is a follow on to Part 1 In order to use my new Specifications within expression trees so I can use them in projections/navigation collections I had to write ...
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2answers
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Specification pattern in EF part 1

I've been experimenting with different ways of reusing (and naming) the expressions I use in Entity Framework. I've tried static fields with Expressions and ...
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1answer
90 views

EntityFramework code-first - right place for entity “import” function [closed]

I have an EF-driven Repository pattern implementation. Roughly looks like this: ...
3
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1answer
1k views

Entity Framework query optimization

A user can track a show, and mark episodes and seasons of that show as watched. To support this I have the models below: Models ...
8
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1answer
2k views

GET with paging, sorting and filtering

I have a GET method that handles paging, filtering, and sorting. Development has been fairly rapid and I'm not completely sold on some of the implementation. A few assumptions have to be made for this ...
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3answers
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ASP.NET Product Listing

I am working on a e-shop in ASP.NET MVC, and I just made the listing of product the way I figured out this night. Is it correct? Or should I make it differently? How? So this is my Product controller,...
3
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1answer
1k views

Select query helper for nolock and no change tracking

I often need to switch connection strings and databases (dev/prod) and I need to be able to execute queries with the NOLOCK flag. For this purpose I create a few ...
6
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3answers
11k views

Improving time it takes to insert thousands of records using Entity Framework

I have a task in my program that is inserting thousands (94,953 in one instance and 6,930 in another) of records into my database using Entity Framework. Right now I am doing this and calling the <...
4
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1answer
136 views

Retrieving collections from a database

I have two collections that I want to retrieve from the database and associate with each other. My solution works, however I know it isn't the most elegant one. Do you have any suggestions on how to ...
2
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1answer
199 views

Simple repository for a small/medium sized ASP.NET MVC site

I am about to start a small/medium sized project. I am by no means a software architect. But I tend to question every move I make at times, since I want to do things correct. I found a way to ...
1
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1answer
5k views

Calculating the .Sum() in Linq-to-SQL

I have the following code where I need to execute 2 Linq-to-SQL statements. If I do not have the Any() in the if statement, then ...
2
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0answers
1k views

Optimising looping through large data set and updating database

I have a database table storing information about documents (MigrationMaster). There is another table with security information on these (DocumentSecurity). There are 4 steps I can see that I need to ...
2
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1answer
7k views

WPF/MVVM with Entity Framework, Repository and Unit of Work pattern

I'm building WPF/MVVM application and I'm struggling implementing Unit of work pattern. The part, about which I'm not sure is UnitOfWork class. Here is my thought: ...
2
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1answer
1k views

WebAPI Authentication

Do you see any security issues with this authentication approach or have any suggestions? WebAPI is REST-based. The user logs in by calling the Authentication Controller and expects a 401 if ...
2
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2answers
918 views

Take a result set and organize it into a dictionary

I'm trying to take a result set and organize it into a dictionary then assign the dictionary values to variables that are publicly accessible from my controller. My issue is I have to check if there ...
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1answer
39 views

Mapping discussion entries from an SQL-View to objects

In my ASP.NET MVC application, I am loading Discussion Entry records along with User info (who posted the entry), Badges (assigned to the entry), Reactions (made to the entry like Facebook-style ...
3
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2answers
1k views

Sales order domain model with Entity Framework

I am wondering whether the following inheritance pattern is a good idea. I noticed that Sales Orders, Sales Quotes and Sales Invoices all follow a similar Master/ Detail pattern ( i.e a Header with ...
8
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1answer
16k views

Cloning Entity Framework entities

I'm currently writting piece of logic which copies entities from one user account to another. My current strategy in doing this is like that: Consider the following code: ...
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1answer
694 views

UnitOfWork without repository and transaction

I've created the unitofwork class below: ...
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1answer
653 views

Web API with IoC and database integration tests [closed]

I've made integration tests for a major part of my application. I test my dependency injection is set up correctly, creating controllers with it's dependencies going all the way to the database (using ...
2
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1answer
1k views

API controller with database queries

I have the following controller with a couple of database queries and I'd like you to review it. I've tried to make it clean for other developers but the communication with the database can be ...
4
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1answer
97 views

First time using entity framework with simple repository

I'm working on updating a GitHub project that I use at work, but I think the person abandoned the project as there is a pull request for it since 2014. At work we use a Repository pattern with ...
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1answer
2k views

Data layer using extension methods

I've started to use extension methods to provide data layer functionality in our project. Our project is an MVC website using Code First Entity Framework. So, I've done things like this: ...
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1answer
12k views

Passing model to _layout.cshtml

I have login page that looks like: It has a ViewModelBase and a ViewModel as: ...
2
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1answer
1k views

Repository pattern for books in EF6

I am working on a generic repository. And I wondered if anyone could give some feedback on it. Interface for DbContext: ...
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2answers
100 views

Two times same code in methode except one little line

In Service.Insert(), I call DeviceRepo.Insert() and in Service.Update(), I call ...
3
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1answer
2k views

Repository Pattern universal application

When I started learning Repository Pattern with Unity few days ago I was under impression that the main benefit of this pattern is the separation of data layer from the business layer. In other words,...
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1answer
2k views

Using EF 6.1 for updating objects and their children

I have an application that allows a user to create a poll that includes questions and answer choices as part of the poll. The hierarchy is a poll has one or more questions, a question has one or more ...
2
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1answer
163 views

Web-service for wiki-like movie database

I'm making a web-service for an app with a (partially) crowdsourced movie database. These two functions allows users to add and remove which genres a movie is liked to, and get the log of whom have ...
2
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1answer
93 views

Building a simple REST service using Web API 1.0

Friends, It's been several years since I last worked with the ASP.NET Web API framework. Even then I had developed with it minimally. I have a requirement for a service that will allow for the ...
2
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1answer
1k views

Building expression tree with multiple OrElse

I am creating a way for users to filter results based on start and end values. An example of this would be: ...
2
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1answer
125 views

Edit one table from another table in a Windows Form DataGridView

I have a Sales Order Program that allows each customer to have their own Part Number for one of our Stock Items. The Customer Part Numbers are stored in a separate table. I need to make this as low ...
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1answer
584 views

Domain Model for Simple Yes/No

Working from a C# and EntityFramework background. Jimmy Bogard makes the point of modelling your domain model correctly, such ...
3
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2answers
732 views

Optimize OrderBy Generic Method

Here is my OrderBy method which includes concatenated column names. Can this be achieved more efficiently? ...
2
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1answer
5k views

DAL basic implementation using Entity framework 6 and Autofac

Would like to ask for a code review for my DAL. I use Entity framework 6 and Autofac for ...
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1answer
53 views

LINQ to SQL code - in models project or in db project

I currently have two projects. One called Models, a second called TaskEntityModels, a model first ...
5
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1answer
182 views

Paginating blog posts from SQL server using nested LINQ statements

I made an ASP.NET MVC application using Entity Framework for code-first migrations to the SQL Server database. I also use Unity (DI/IoC) for managing the services and repositories. I made an overview ...
0
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1answer
2k views

Method or helper function to return objects from EntityFramework with Linq [closed]

The following code reads from Microsoft EntityFramework 6.0 domain model and returns the single view_patient object. The view_patient object is defined in the backend database and uploaded to the ....
2
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1answer
463 views

Return most recent DateTime C# Entity Framework

Job -> Many Quotes Quote -> EmailLogList EmailLogList -> Many EmailLogs I want to return a CreatedDate from an EmailLog which has been created most ...
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1answer
274 views

Entity Database Add/Update method

What would be the most elegant way to refactor the following method? ...
1
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1answer
344 views

Eager Loading Deeply into a Model with a Collection Property Whose Type is Inherited

Visual Studio generated this great route for me, where I can load an entity: ...
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2answers
231 views

Entity framework - code first data access

I'm looking for your opinions about ways to improve the access to data in my application. I develop web applications, using Entity Framework 6 code first, and Autofac for dependency injection. Before ...
2
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2answers
295 views

Medical appointment book history

This code correctly returns a View_appointment. Is there a better way to accomplish this with using left joins and unions? I'm trying to learn Linq a little bit ...
4
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1answer
3k views

EF IQueryable Extension Methods

I've started building extension methods for my EF classes like below because it makes building queries so easy, and the intellisense provided helps keep people from writing a new Where() clause in ...
2
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1answer
305 views

Custom data validation approach for store items and prices

I came up with a validation design for my project and wanted to hear if there's anything I could improve. Here's how it works. I have the models (code first) ...