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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14 views

asp.net mvc 5, EF 6 filter performance

I'm creating a filter with Linq in an asp.net mvc application. I was hoping I could get some tips on performance enhancements. ...
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Functions using similiar LINQ queries is repeating the code? [on hold]

I'm using some very similiar LINQ queries. If I want to change one, I have to change the rest of them, yet all three are doing essentially something different. ...
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C# LINQ CODE REFACTORING [on hold]

I'm using entity framework to get data from a db, I'm also using linq to group the data and some stuffs linke that, and I've just wrote a method which is grouping data by it's status: ...
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3answers
148 views

Collect reporting data for each possible combination of filter properties

Basically I'm looking for a way to improve my code, and avoid making a lot of if statements and parameter combination manually, 'cause I need to return a query result depending in the parameters that ...
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21 views

Console app to get XML from API and save to database

I am making a small console app to get XML from an API and then save the data to a database. While this project was not created via test-driven-development, I have tried to make it such that tests can ...
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1answer
103 views

Small application for manipulating users and their activities

I made a small application using C#, SQL Database, entity framework , and windows forms to manipulate users (...
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39 views

Entity Framework C# updating an entity list generic solution

I have an entity which has a list of other entities in it. for example: class Library { public virtual List<Book> Books{get;set;} } And I would like to ...
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1answer
82 views

Initializing entity framework context in constructor

We use the architecture shown in the code below to initialize the DB context for our MVC 5 project using entity framework 6 We have the following questions related to it: Is it safe to initialize ...
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2answers
39 views

LINQ queries to generate a report on accrued work time on projects

The following code fetches data from a MySql database to generate a simple report on accrued work time on projects. I've been away from Entity Framework for a while and looking at this code you can ...
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1answer
43 views

Authorization using Entity Framework in ASP.NET MVC

1. Backstory I recently starting programming and I found out that Entity Framework works perfect for my small-sized applications due its simplicity. I've made my custom authorize attribute for MVC ...
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1answer
222 views

Generic UnitOfWork

I am trying to create a Repository & UnitOfWork for Data Access Layer. In my current implementation I have to modify my UnitOfWork everytime I create a new repository. I would like to avoid that ...
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1answer
86 views

Handling Entity Framework in connected mode within Windows Forms [closed]

I know the difference between the Entity Framework connected mode vs disconnected mode. In connected mode we do all the stuff inside one single DbContext instance. ...
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2answers
235 views

Using IQueryable.GroupBy to count related database entities

Given a DbSet<Client> from an Entity Framework 6 DbContext, I need to count the number of related ...
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1answer
56 views

Repository to update flights

I have the Repository below, but I have noticed that there is a recurrent pattern try / catch which does not seem to be that ...
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49 views

Loading data via Excel to SQL

I am loading data from a excel file to sql, I added comments to the code to further clarify what each lines purpose is. ...
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1k views

Using Entity Framework to Call an Oracle Stored Procedure with Multiple Cursors

I wrote the following code to use Entity Framework 6 and Managed Oracle Providers to call an Oracle stored procedure that returns multiple cursors. Would like some input about the code I used to ...
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1k views

Transaction integrity in asp.net core with entity framework and generic repository

I am not very experienced in Entity Framework, I previously used ADO.Net and Dapper for data persistence. For now, I only read Microsoft docs and watched a few video tutorials. I tried to stick to ...
3
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1answer
54 views

Registering an event participant, using Entity Framework and several associated models

I have a method that is responsible for receiving an object and perform the information saved with Entity Framwork, using the Repository pattern. The issue is that this object is, basically, a DTO. ...
3
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1answer
670 views

Dynamic AuthorizeAttribute with database

I want to create a AuthorizeAttribute that gets the current ActionMethod RouteData and ...
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0answers
111 views

How to optimize code to only pull separate table rows that are necessary

I have a Company Class, and separate normalized Address Class. I did this because the Address table will hold more than just Company Addresses, so I don't want "CompanyAddress", "EmployeeAddress", "...
2
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1answer
3k views

Adding or updating Company entity

Here I am trying to post a company view-model and update and insert according. But I feel I am writing it in wrong way or maybe there's a better approach. Here's my code ...
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1answer
164 views

Filtering DbContext data dynamically by user input in WPF applications

I need to filter database data based on filters available to the end user in the form of search term text box, select boxes etc. I have put together this code and need feedback if this is a good way ...
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0answers
39 views

Correct Way to Retrieve Header Records With Filtered Detail Records [closed]

I wrote this in LinqPad. It works. The whole point was to retrieve header records, and only include some detail records. I'm looking for possible improvements to this, specifically around the ...
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1answer
107 views

Implement Entity framework insert with better performance [closed]

I have very slow performances on EF. I have many foreach, mappings. Do you have suggestion? I would like to make improvement without complicated refactoring and I would like to use EF. ...
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2answers
78 views

Improving predominance for updating 40000 records using entity framework [closed]

I have Two tables Circuit and Tag, Circuit ------------------ Id Name Path Tag ----------- Id Name Circuit_Id Now I have to loop through all the tags and ...
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1answer
698 views

ASP.NET Identity 2.0 UserManager alongside with UnitOfWork and Service-Locator anti-pattern

I was wondering whether it is a good aproach to have Identity 2.0 UserManager next to UnitOfWork pattern? I am using ...
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2answers
3k views

Repository pattern along with EF and Unit of work

I'm new to this Repository pattern and have seen lot of repository pattern + UoW implementations all over the internet and I'm not able to reach to a conclusion as to which of them is correct . After ...
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2answers
1k views

Entity Framework Lazy loading performance comparison

The following code takes about 20 seconds to run with about 200,000 records in the TaskLogs table: ...
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1answer
72 views

Controller with TemplateService

I am working on my template web api project. I just wanna hear any suggestion how to improve this code. I heard that repository pattern is anti pattern so I want to make code without it. Any opinion ...
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1answer
4k views

Injecting a DbContext with an async constructor dependency

The goal is to construct a DbContext with a connection that uses an access token. The access token is acquired with ADAL (Active Directory Authentication Library). ...
2
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1answer
865 views

Navigation properties with sql/dapper

I want to have the same experiance with slq/dapper for my navigation properties just like in Entity Framework. But I'm not sure which sql query i should use. As you see, every single Resource entity ...
2
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1answer
2k views

Service Layer, using Entity Framework 6.2

I would like you to review a part of my warehouse application, a Service Layer to be exact. The architecture of the program is: DB --> .Data (EF's DbContext/...
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1answer
1k views

How to optimize a nested foreach loop which is creating same data object (with different values)

I have following code which gets MastrSegments from repository(entity framework). It's working but I think I am violating DRY (though not sure). MastrSegments conatins collection of SegReqs and ...
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0answers
948 views

Entity Framework with two databases (with UoW, Repository and Service Layer)

I have two databases: one for a warehouse, second for the office (The db design is out of the scope of this question). There are MANY cross-database funtions. One of those functions is ...
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1answer
57 views

Data validation for to check required fields are mapped

Can I break the below foreach and IF statements into LINQ expression. Also, performance wise which will be better. Please suggest. ...
2
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0answers
131 views

EF mapping complex type to JSON in DB

I am trying to map a complex type to Json and store the info as Json in the DB using EF6 Code First. Here's what I have for now: The complex type ...
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0answers
43 views

Querying a database to find notifications to comments

I have a solution what I think is not the best, and I want to make this not so expensive. I'm using MVC 5 + SignalR (hubs) + EF + UnitOfWork + Generic Repos. I have a table ...
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1answer
745 views

Entity Framework MVC updating db using a repository method [closed]

I have inherited this code from a legacy project, and it is throwing a New transaction is not allowed because there are other threads running in the session. error. Now I know the problem here is ...
2
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1answer
319 views

Creating a simple unit of work with Entity Framework and no repository

I've been trying to implement a .NET MVC Unit of Work API (rather than creating a separate repository), but it doesn't feel right. Am I going about this the correct way? Following advice from here. ...
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1answer
71 views

Search through multiple lists, but have functions that do that in parts

I have an Entity Framework table of Addresses. I'm building a Repository that would allow me to search for an Address by either parts of the Address or the whole address. Here's what I've got so far: ...
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0answers
715 views

Dynamic context.Set load and update/insert with using dynamic field in C# entity framework

I am writing an importer service. I have different sources and at the end I would like to push them into database tables. For different db tables, I am using different dbset in the context. I also am ...
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1answer
321 views

Calculating difference in time

In table first value I have value with datatype = Start I need to calculate difference first value - midnight Last value is ...
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1answer
599 views

EF Core Complex Query Method

The code is returning reviews based on users like status order. It seems it executes a lot of SQL queries, so do you think it can be simplified and can it be a headache to server performance? ...
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1answer
2k views

use Identity value in entity after insert in Database [closed]

i want to generate value using current date and ID of inserted entity problem is that ID value not generated until insert object to database, so i use this code for generate value: ...
3
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2answers
149 views

Getting a serial number from shared table

I have a table that keeps track of a global serial number shared between several tables. This is not the PK or unique id for each table. It is like a case identifier. Every time users create a new ...
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1answer
151 views

Performance concerns for synchronous action methods

I have an ASP.NET MVC 5 application using Entity Framework with SQL Server 2016. The application is mainly basic CRUD. The boilerplate generated when creating the project in Visual Studio did not have ...
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0answers
265 views

Domain Driven Design Model for handling images

I have to create model which will handle various types of images in my app. INTRO Plan is to have one Image type which will be universal and then extended with ...
7
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2answers
18k views

C# - Entity Framework + Repository pattern + Unit of work pattern

After hours spent on reading various articles about correct way to implement Repository patter & UoW patters I finally think that I have managed to create (hopefully good) implementation. The ...
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1answer
16k views

Entity Framework - Add or Update Parent Entity with Children

This code saves an DomainEntityRecord (parent) and DomainEntityDetailRecords (child), and it works. It feels odd that I get the ...
6
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2answers
11k views

Get total count of object's elements and all children objects` elements

I have a table, Taxonomy, with data that looks something like the following: ...