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Entity Framework 6.0

EF6.0

Great Reads

Adding INotifyPropertyChanged to Entity Framework Classes

by MarkLTX

Automatically implement INotifyPropertyChanged for every property in Entity Framework 6.0 entity classes

Manage Entity Framework Code First in Real Time Projects

by DiponRoy

How to manage Entity Framework Code First in Real Time Projects

Entity Framework Introduction Using C# - Part One

by Emiliano Musso

In this article, we will see how to use entity framework in our Applications, developed through the various languages that Visual Studio allows us to use. The examples in this article and probably in the next, will be C # used under WinForms, but - as mentioned - this choice is not going to affect a

Finding Non-disposed Contexts in Entity Framework 6.x Applications

by Vahid_N

It's easy to forget not disposing object contexts, which leads to memory leaks and also leaves too many related connection objects not disposed as well.

Latest Articles

EF6 Migrations and TimeStamp Bug with CodeFirst

by Herman.Instance

Migrations does not apply to T-SQL rules for ALTER TABLE ALTER COLUMN

Learning Entity Framework (Day 2): Code First Approach and Migrations in Microsoft .NET Entity Framework

by Akhil Mittal

Code First Approach and Migrations in Microsoft .NET Entity Framework

CRUD Operation in ASP.NET Core Web API with Entity Framework Core

by MukeshKumarTech

This article will explain how to perform CRUD (Create, Read, Update and Delete) operations in ASP.NET Core Web API using Entity Framework Core.

ASP.NET MVC 5: Building Your First Web Application - Part 1

by Vincent Maverick Durano

This article is part 1 of the series for building a simple web application in ASP.NET MVC 5.

All Articles

Entity Framework 6.0

15.2 What's New for XAF

29 Nov 2015 by Michael Bogaerts

What brings the 15.2 release for XAF (win) developers

entity-framework

About the jQuery UI dialog

26 Feb 2016 by Luis Oliveira 1966

How to perform CRUD operations (Entity Framework) in dialogues (jQuery UI) and process validation in my MVC application ?My problem is related to jQuery, specifically on how to show the dialog then treat the responses/data validations from the Controller.I have this code in...

Accessing DisplayName attribute from the Column.ColumnName property of a DataTable

3 Jun 2015 by Grant Weatherston

I have a DataTable object, that i'm using to represent data in a view. The view is generic and therefore i want to just pass in data and display it on the page for all my models (rather than having a different view for each model, when all going to look the same visually).My problem is, i'm...

Add parent and child together by .NET EF6 code first

2 Dec 2021 by 4L4K1

according to the code in what I have tried section BuySellHouse is parent EstateImages is child I tried to create a 1 to 0/1 relationship. I am not sure I did it correctly inserting parent with child by code like this gives me an error ...

Add parent and child together by .NET EF6 code first

3 Dec 2021 by Richard Deeming

You've created both a one-to-one relationship (by convention) and two one-to-many relationships (by configuration). That's definitely not correct. Based on your description, you need: public class BuySellHouse { public int Id { get; set; } ...

Adding INotifyPropertyChanged to Entity Framework Classes

14 Dec 2014 by MarkLTX

Automatically implement INotifyPropertyChanged for every property in Entity Framework 6.0 entity classes

An exception of type 'System.Data.Entity.Core.MetadataException' occurred in mscorlib.dll but was not handled in user code

25 Jul 2016 by m.kolbadi

The problem is that the connection string was incorrect. It wasn't immediately obviously with that error message but when you think about it, it makes sense.My connection string was:...

Architecture sample for Database First

12 Oct 2014 by slSoftware

Hi All,I'm going to develop my application using Database first approach, is there anyway to do with layered architecture?Thanks

Architecture sample for Database First

12 Oct 2014 by Suraj Sahoo | Coding Passion

Yes oviously there is, you can follow repository pattern for this.The best thing is to put the .Edmx file in the Infrastructure folder rather than in the core folder. Please follow the following link for Onion ArchitectureOnion Architectur[^]This is very nice and layered architecture to...

Architecture sample for Database First

14 Oct 2014 by Suraj Sahoo | Coding Passion

Kendo and Knockout[^]Please check hereI have never used but still please check here. I will explore more from now. You can keep posting your queries below this for more discussion.Thanks :)Have you checked this??Check this[^]

ASP.NET Core RC2 Using WEB API And AngularJS - Part 1

20 Jun 2016 by Toan Manh Nguyen

In this article you will learn about ASP.NET Core RC2 using WEB API and AngularJS.

ASP.NET Core RC2 Using WEB API And AngularJS - Part 2

20 Jun 2016 by Toan Manh Nguyen

In this article, you will learn about ASP.NET Core RC2 using WEB API and AngularJS.

ASP.NET MVC 5: Building Your First Web Application - Part 1

3 Jul 2018 by Vincent Maverick Durano

This article is part 1 of the series for building a simple web application in ASP.NET MVC 5.

ASP.NET MVC 5: Building Your First Web Application - Part 2

6 Aug 2016 by Vincent Maverick Durano

This article explains how to create a Login page and create a custom role-based page authorization in ASP.NET MVC 5 application.

ASP.NET MVC 5: Building Your First Web Application - Part 4

5 Aug 2016 by Vincent Maverick Durano

This is part four of the series on Building Web Applications in ASP.NET MVC 5.

ASP.net MVC Entity Framework - Return records only valid for user

19 Aug 2014 by Terence van Schalkwyk

I have been searching for an answer on the web for this and cant seem to find one, not sure if I am wording my search incorrectly or not.If I have a contact table:FirstName | LastName | OwnerOwner links to the ASP Identity tableHow when my user logs in will can I make it that it...

Auto generate GUID in mvc5 that uses EF

29 Aug 2017 by Janine_A

I have an mvc5 application that is connected to a EF database. Some fields in this database are meant to be autogenerated as declared in SQL, but when used in MVC and upon inserting records, the GUID only contains the value of 0 for all records. How can I resolve this? Any help will be...

Auto table (re)creation on insert events at case of ef-code-first

24 Apr 2017 by SlavaUtesinov

Implementation of "insert" repository with dynamic database table (re)creation, if it not exists. It is possible to specify which migrations will be used for that otherwise will be used default creation logic. Usage example - dynamic logging and archivation or manual table creation for some purposes

Autogenerate DataContracts for WCF from POCO Classes

7 Dec 2016 by Kuv Patel

Convert a class library of POCO classes to datacontracts for use with WCF without having to write DataContract and DataMember attributes directly to the POCO classes.

entity-framework

Automatic graph operations using EntityFramework

10 Nov 2016 by MammadovAdil

Automatically define state of entity graph for EntityFramework Code-First using a single line of code.

entity-framework

Automatically populating a Textbox on the basis of the value of another one

29 Oct 2014 by Mohsin Azam

as title says how can i populate a Textbox on the basis of the value of another one,first textbox is txtTasks now i want to populate project(s) which is related to that tasks in second textbox..here is the code of linq for both,but remember i am using database not pre-list for it in asp.net...

SQL-Server-2008R2

Best way to organize WEB API method for following scenario

21 Feb 2015 by i_syed2000

Assume, I have the following entity set below.Phone(PhoneId, PhoneNumber) Person(PersonId, FirstName, LastName)Company(CompanyId, CompanyName)Broker(BrokerId, BrokerName)PersonPhone(PhoneId, PersonId, PhoneType)CompanyPhone(PhoneId, CompanyId, PhoneType)BrokerPhone(PhoneId,...

Best way to organize WEB API method for following scenario

22 Feb 2015 by _Maxxx_

I think, to me, the Person controller needs to handle this.A Person needs to know about a Phone - but a Phone needs no knowledge of a Person.So your phone controller shouldn't need to know about Person at all.

BindingSource and Entity Framwork are not aware of each other

22 Nov 2014 by vedatg1980

In our project we are using-Entity Framework - Repository Pattern + Unit of Work Pattern together + We are using Devexpress controls.The related part of the code for initializing our grid is:UOW = new RepositoryObject.Core.UnitOfWork();repXtraGridAddXtraEditor = new...

Build solutions with Entity Framework and Layered Architecure, unit of work

20 Feb 2015 by i_syed2000

I'm planning to use EntityFramework as my back end layer. I have also defined a ServiceLayer (not WCF), which has method which closely mimics application use cases.I'm trying to figure out the role of Business Logic Layer, and DAL layers and how Service layer interacts with them. Take this...

Building an OAuth Yammer App with ASP.Net MVC and Web API

4 Mar 2015 by MatthewThomas

In this article, we'll build an ASP.Net MVC 5 web app which will search your Yammer feed for a hashtag, and display the poster's home town on a Bing map

Bulk Operations using Entity Framework

3 May 2018 by Måns Tånneryd

Extending the entity framework with bulk operations for both inserts and updates

entity-framework

BulkInsert with the Entity Framework

3 May 2018 by Måns Tånneryd

How to extend the Entity Framework with bulk insert functionality, using DbContext

entity-framework

c# Object reference not set to an instance of an object.

15 Jul 2015 by Sabi1610

Hi,I'm running this code in the Edit View and it works fine however in the Create View it generate Object reference not set to an instance of an object error for this specific line foreach(var evnt in s) I can't seen to grasp the issue.

c# Object reference not set to an instance of an object.

20 Jul 2015 by Sergey Alexandrovich Kryukov

If your correctly pointed out the line where the exception is thrown, s is null. You could see what's wrong in not time if you used the debugger. Really, you cannot ask such questions each time it happens; you really need to learn to cope with such situations on your own.Not to worry. This...

Can I use code first & database first in the same project?

6 Jun 2020 by Golden Basim

hi, i created new project C# & EF6 (Database First), but after some times i need to update the tables ( add new tables , Fields , delete Fields) What I have tried: in this time i use MySQL Query to do that , but i ask if there are any method...

Can I use code first & database first in the same project?

6 Jun 2020 by Dave Kreskowiak

No. You can use one or other, not both in the same project. For a new project using Code First, EF will automatically create the tables for you from the DbSet entries in your DbContext implementation.

Cannot capture datagrid collectionviewsource insert/delete row

12 Sep 2020 by Member 14892534

I am looking for solution to the issue of insert new or delete of a datagrid row that is not being identified or captured by simply checking dbcontext.changetracker.haschanges status. HasChanges picks up when user modifies existing datagrid row...

Cannot capture datagrid collectionviewsource insert/delete row

12 Sep 2020 by Gerry Schmitz

Too much "coupling". The Observable Collection doesn't interact with the data context. You add event handlers to the OC (i.e. CollectionChanged) that interact with the data context. The entities in the OC should be "detached" from the DbContext...

Change class property name EF

22 Feb 2017 by Member 11748288

hi i want change Property Name in EF Entity to create Custome XML with Web Api.my entity ispublic partial class foo{ public int ID{get;set;} public string Name{get; set;} public string LastName{get; set;}}and created Xml is Ali ...

Change class property name EF

22 Feb 2017 by Valery Possoz

Hello,You just need to decorate your class. [DataContract(Namespace = "")] public partial class foo { [DataMember(Name = "code")] public int ID { get; set; } [DataMember(Name = "Firstname")] public string Name { get; set; } ...

Change class property name EF

22 Feb 2017 by Graeme_Grant

I hear that you don't want to decorate your classes with attributes but to do it totally POCO, there is a bit more work involved. Check out Sam's Flickr.Net Lib. Here is how he does it with his Photo Class: flickr-net/Photo.cs at master · samjudson/flickr-net · GitHub[^]. My preference...

Collection was modified; enumeration operation may not execute. At foreach

8 Nov 2019 by Golden Basim

i try to fetch the data (funds data) and filter the results with its balance but this error appear : System.InvalidOperationException: 'Collection was modified; enumeration operation may not execute.' at foreach (account_funds f in account_Funds) What I have tried: public...

Collection was modified; enumeration operation may not execute. At foreach

7 Nov 2019 by phil.o

You cannot enumerate a collection in a foreach block and modify the collection in the same block. Usually the solution is to get back to a plain old index iteration, starting from the end of the collection. In clear, changeforeach (account_funds f in account_Funds) { if...

Collection was modified; enumeration operation may not execute. At foreach

7 Nov 2019 by F-ES Sitecore

Rather than executing account_Funds.Remove(f); keep a collection of all the items you want to remove; var toRemove = new List(); foreach (account_funds f in account_Funds) { if (trsBalance(f.accfunds_ID) == 0) { toRemove.Add(f); } } after...

Collection was modified; enumeration operation may not execute. At foreach

8 Nov 2019 by Richard Deeming

Another option: account_Funds.RemoveAll(f => trsBalance(f.accfunds_ID) == 0); List.RemoveAll(Predicate) Method (System.Collections.Generic) | Microsoft Docs[^]

compare date between two fields in mvc

9 Dec 2014 by JOTHI KUMAR Member 10918227

hi to all, compare date if one fields name delivery date and another field name posting date. Now i want to check delivery date is greater than posting date.how to compare using mvc.What condition shall i want to use and where i write condition in controller or model or...

compare date between two fields in mvc

9 Dec 2014 by Raul Iloc

Normally you should do the validation of your two dates on the client (in the View), so in order to do that you should do the next staps:1)Define a custom validation attribute class;2)Mark you both DateTime properties from your model with this attribute;3)Update the view to use...

Concurrency Handling In Entity Framework 6 (Database First Approach)

1 May 2017 by Roshan Choudhary

Handling data concurrency in Entity Framework 6 with Database First Approach.

entity-framework

Context Menu has no Add – New Scaffolded Item.

1 Jul 2015 by Sabi1610

Hi,I'm creating an MVC 4, entity framework 6 in VS 2012 web express. When trying to add a scafffolded item to add a controller the item does not appear in the context menu. I have tried various solutions;Load/unload the project Add GUID to the .projChecked Nuget but...

Controller does not execute StoredProcedure but View

22 Sep 2015 by Herman<T>.Instance

Hi Everyone,I am creating a WebAPI using EntityFramework 6.0For SELECTING I use a View and that data is shown in my webpage.FOR INSERTING or UPDATING I want to use a StoredProcedure. In the EDMX I have set that up, matched all the parameters.When I execute the Update of a datarow in...

entity-framework

Create and Calling SqlFunctions in Linq to Entities C#?

16 Dec 2014 by Mohammad Dayyan

We wanna create the following code dynamically with expression:TestDatabaseEntities entities = new TestDatabaseEntities();entities.Database.Log = s => System.Diagnostics.Debug.WriteLine(s); // to show generated tsql// We wanna create the following code dynamicallyList...

Create Primary Key using Entity Framework Code First

4 Sep 2014 by Dukhabandhu Sahoo

Explore the Entity Framework Code First convention and configuration for creating primary key

SQL-Server-2008R2

entity-framework

Creating composite key with multiple foreign keys from same table EF code first

2 May 2019 by OvrLrdFregus

Hey all, I am having an issue with Code first on EF6. I get this error when trying to create a migration "The number of properties in the Dependent and Principal Roles in a relationship constraint must be identical." Here is the code: public class TradeJournal { [Key,...

entity-framework

Creating composite key with multiple foreign keys from same table EF code first

27 Apr 2019 by Gerry Schmitz

You have a one-to-one relationship according to you classes. Entity Framework – mapping references with composite keys | Feb dev[^] c# - Entity Framework Code First One to One relationship on composite key - Stack Overflow[^]

entity-framework

CRUD Operation in ASP.NET Core Web API with Entity Framework Core

11 Sep 2018 by MukeshKumarTech

This article will explain how to perform CRUD (Create, Read, Update and Delete) operations in ASP.NET Core Web API using Entity Framework Core.

entity-framework

CRUD operation with Entity Framework 6 Code First approach in MVC 5

27 Jan 2015 by TalentTuner

In this article, I’ll describe how to perform basic CRUD operations using code first in an MVC5 application.

Custom Seed Serializer for Entity Framework Code First C#

11 Jun 2014 by DiponRoy

Custom Seed Serializer for Entity Framework Code First C#

data entity framework relation problem

12 Aug 2014 by meysam_25

hii have two classusing System;using System.Collections.Generic;using System.ComponentModel.DataAnnotations;using System.ComponentModel.DataAnnotations.Schema;using System.Linq;using System.Web;using Cor;namespace IVF_EHR.Models{ public class FileExtrainformation...

data entity framework relation problem

12 Aug 2014 by Nathan Minier

Your POCO is setup wrong for a proper FK relationship. You'll need to reformat some of it like so: public long? ExtrainformationABOFemaleID { get; set; } [ForeignKey("ExtrainformationABOFemaleID")]should be [ForeignKey("ExtraInformationFemale")] public long?...

data entity framework relation problem

12 Aug 2014 by meysam_25

no one never helped me .i am my own .ok i will figure out.

Dataretrievalexception: ambiguous match found.

15 Apr 2019 by Golden Basim

i try to show xtrareport , this report was binding to SP using Framework, but this error appear during creating document . report.CreateDocument(true); DataRetrievalException: خطأ عند محاولة ملء مصدر البيانات. تم طرح الاستثناء التالي: Ambiguous match found. this line "خطأ عند محاولة ملء...

Delete image after uploading

25 Oct 2014 by Member 10225052

Hi everybody, i want to delete an image after uploading, I have this for view: @using (Html.BeginForm("UploadMorePhotos", "Account", FormMethod.Post, new { enctype = "multipart/form-data" })) { ...

Delete image after uploading

25 Oct 2014 by Suraj Sahoo | Coding Passion

Please check for the files that you are sending from client side to the Server side. Debug and chck i think this error is coming up because the files is null and without null checking you are trying to get files.ComtentLength. So null's property cannot be found that gives Null Exception. The...

Difference between ICollection<SomeModel> vs List<SomeModel>

25 Nov 2014 by Vishal Pand3y

I Have a model Lets say Customer and Products and this is one to many between Customer and Products ie one customer can have multiple products Now what is difference between public class Customer{public int Id { get; set; }public int Name{ get; set; }public ICollection...

Difference between ICollection<SomeModel> vs List<SomeModel>

25 Nov 2014 by Kornfeld Eliyahu Peter

ICollection is an INTERFACE, where List is a CLASS that IMPLEMENTS that specific INTERFACE!So the second option is bonded to the type 'List' where the first option can work with any type that implements the ICollection interface...

Difference between ICollection<SomeModel> vs List<SomeModel>

25 Nov 2014 by OriginalGriff

ICollection is an interface, List is a class.Which means that the first definition can take any class which implements the ICollection interface (which supports methods such as Add, Remove, and so forth: http://msdn.microsoft.com/en-us/library/92t2ye13(v=vs.110).aspx[^]) where List...

Difference between ICollection<SomeModel> vs List<SomeModel>

25 Nov 2014 by CPallini

Please note, your code wouldn't compile (you need to give a name to your ICollection or List property).In the first case, e.g.public class Customer{public int Id { get; set; }public int Name{ get; set; }public ICollection ProdColl{ get ; set ;}}You may use any of the...

Doe anyone know if ChangeInterceptors are safe in a multiuser enviroment?

6 Oct 2015 by rdamske

I am using OData/EF6 and I have coded up my ChangeInterceptors. I was wondering if I need to do something to ensure that two users do not step on each other if both happen to execute the same ChangeInterceptor at the same time. I cannot find anything either way about this.Russ

Dropdownlist, populate data from database

13 Jan 2015 by Member 10225052

HI everybody,I try to populate the data from database in a dropdownlist, like this: ViewModel:public class ClimbViewModel { public int Id { get; set; } [Required(ErrorMessage="You need to give it a name")] public string Name { get; set; } ...

Dynamically generated lambda giving different result than regular lambda

16 Oct 2014 by GateKeeper22

I am have a problem with Dynamically generated compared to a regular lambda expression in code. Below is the code that I use to generate a dynamic lambda.Dynamic Lambdavar parameterExp = Expression.Parameter(typeof(T), "x");var propertyExp = Expression.Property(parameterExp,...

Easy application to detect and recognize faces with EmugCV

7 Sep 2016 by Emanuel Santos

In this article i will show how to create a basic application to detect and recognize faces using EmugCV.

entity-framework

EF power tools reverse engineer from database vs EF Database first. What is the difference?

31 Aug 2015 by pallavi Praharaj

I have an existing sql server database and want to add a new Entity Data Model which i want to point to that existing database.I want to use reverse engineer to make it 'code first' style. what is the advantage and disadvantage of this? What is the advantage and disadvantage of Database first...

EF power tools reverse engineer from database vs EF Database first. What is the difference?

31 Aug 2015 by Passion4Code

Detailed Explaination[^]The above link will clear your doubt I hope.EF Code First is very handy and shiny now a days, even in EF7 there is only Code First. But in EF5/6 which currently we are using, there are few times we do not opt for reverse engineering. My vote here would be for DB First...

EF6 doesnt add all tables in conceptual model

24 May 2016 by Member 4274699

Hi guys, I have a project mvc asp.net perform with EF5 and had no problems when updating or bringing new tables , however I decided to use the EF6 to test the features but it turns out when I wanted to update the schema to add a new tables, EF6 does'nt add the tables , only added to the folder...

entity-framework

EF6 mapping results in strange update query

17 Aug 2018 by Herman<T>.Instance

Hi Folks, in my ODATA service I use EF6 to work with SQL Server. An EDMX is created also for the table Departments. In that table there is a TimeStamp field for Concurrency purposes. And yes I have added [Timestamp] data annotation in the code. And in the EDMX the field is FIXED for Concurrency...

EF6 mapping results in strange update query

17 Aug 2018 by Dave Kreskowiak

You never gave any details about your database schema as coded in EF, so this is just a guess. What you're seeing is the expected behavior. You are NOT supposed to make any changes to a column tagged [Timestamp] in EF. Timestamp fields are entirely managed by EF. They are used to manage...

EF6 Migrations and TimeStamp Bug with CodeFirst

2 Nov 2021 by Herman<T>.Instance

Migrations does not apply to T-SQL rules for ALTER TABLE ALTER COLUMN

EF6 order the results based on custom values

13 Sep 2020 by Golden Basim

hi, my project was created using c# & entity framwork 6 i have this table (entries) that have status filed the status filed will fill with one of this values : Pending,Accepted,Rejected,Delayed,Completed i want to retrieve all the record sorted...

EF6 order the results based on custom values

13 Sep 2020 by Gerry Schmitz

...OrderBy( o => switch( o.Status ) { case "Accepted": return 1; case "Pending": return 2; ... default: return 6; } ) .ThenBy ... etc.

EF6 the supplied connection is not valid because it contains insufficient mapping or metadata information.

5 Jun 2020 by Golden Basim

hi, based of my previous Question answers. and 2 day of search i decide to change my old approach that i use for setting a custom connection parameters. but i still have some issues, i preferred to create separated question because i thing it...

entity-framework

EF6 the supplied connection is not valid because it contains insufficient mapping or metadata information.

5 Jun 2020 by Maciej Los

I think that no one is able to help you due to the fact that EF configuration should be done in several places. I'd suggest to read official MySQL tutorials: MySQL :: MySQL Connector/NET Developer Guide :: 6.6 Tutorial: Using an Entity Framework...

entity-framework

Empty Business Object when Configure ObjectDataSource?

16 Dec 2014 by raxhemanth

when i'am configuring data source to Objectdatasource the businessObjects are empty not showing any thing? what could be the reason and how to get rid of that.Somebody help me.Thanks in advance.

Entity Framework 4.0 vs Application Data block

26 Jan 2015 by shiv Mohan

What are the advantages and disadvantages of Entity Framework 4.0. What are best scenarios and cases where we should use EF 4.0. Many Experts including Martin Fowler hates ORM , what's your say on this ?Do you prefer using Microsoft Enterprise Data Block over EF 4.0 ? There is lot of...

entity-framework

Entity Framework 4.0 vs Application Data block

26 Jan 2015 by Zoltán Zörgő

Entity framework is evolving. So, I really don't prefere Entity Framework 4... when there is Entitty Framework 6. If one hates ORM, than he/she has a subjective attitude, which is out of any objective question. There are better and less good ORM implementations, but hating them... why?Still,...

entity-framework

Entity Framework 6 - Default Values are allowed only for non-spatial primitive types.

14 Apr 2014 by Pheonyx

Hi Guys,I hope you are all well and that someone here might be able to shed some light on my issue.I have a database table with the following setup:ID [Bigint]Name [nvarchar(250)]ISOCode [nvarchar(5)]MarketType [tinyint]Using EntityFramework 6 Database first, I have added...

Entity Framework 6 - Default Values are allowed only for non-spatial primitive types.

14 Apr 2014 by Dave Kreskowiak

The first question is why are you using "Type"? That is not a good name to use as it is a class name that is used by .NET and is going to lead to confusion in the code.I think your Type should become MarketType, and could also be the name of your Enum. public enum MarketType { ...

Entity framework 6 save from list

19 May 2019 by Ameer Adel Al-Zubaidy

Hello I am on my first EF6 project and I have couple of questions Project outlines Property (Building) have Rooms A Room have list of criteria or rating Each criteria own a set of values i.e. Property (Building) A have Room 1 Each room have bunch of values Value a 0-1...

Entity framework 6 save from list

19 May 2019 by Ameer Adel Al-Zubaidy

Right first of all sorry for the rough English, I am a mess right now the solution is as follows: Loop through the existing Main categories (Property(Building)) for Property.Count Property[i].Rooms = inProperty[i].Rooms So on and so forth for the other nested lists ...

Entity FrameWork Best Example?

21 Jun 2014 by Member 9773183

Hi, Want to know Best Way to Implement Entity Framework???Any Help Greatly Appreciated

entity-framework

Entity FrameWork Best Example?

21 Jun 2014 by Peter Leow

If you are looking for example of Entity Framework, check this out: Simple Sample with Entity Framework [^]

entity-framework

Entity FrameWork Best Example?

21 Jun 2014 by Snesh Prajapati

Visit below...

entity-framework

Entity FrameWork Best Example?

21 Jun 2014 by PrakashCs.net

Please refer site http://www.entityframeworktutorial.net/[^]it has various examples that you need.

entity-framework

Entity FrameWork Best Example?

8 Oct 2014 by Suraj Sahoo | Coding Passion

Entity Framework[^]This would help you for sure..:)

entity-framework

Entity Framework Code First Entities and entity relationships

23 Sep 2015 by Arian Celina

This article is a part of a multi-post article on Entity Framework Code First for web applications: Entity Framework Code First Entities and entity relationships Entity Framework Data Context Entity Framework Migrations and Data seeding It is not very often that I see web development tutorials

entity-framework

Entity Framework DAL with Generic Seeding from JSON, Using Reflection

6 Mar 2017 by Michael Doleman

A simple DAL with an integrated, lightweight model for database seeding from a JSON source, using the code-first method in Entity Framework.

entity-framework

Entity Framework Insert Update Related Tables Intermediate Table.

29 Jul 2015 by stixoffire

I have a Database first EF model with simple POCO entities.I receive a new Product or collection of Products and want to do the following1: Add the new Products to the products table ( seems simple enough to do this in EF from what I read).2: Add the newly received Products to the...

Entity Framework Insert Update Related Tables Intermediate Table.

29 Jul 2015 by Mr Ellipse

When possible, try to link objects in EF to each other by setting Navigation properties. After all, EF is an Object Relationship Mapper :)In order to check if a 'related' entity exists already in the database context (to maintain relationship integrity), you are going to have to do some...

Entity Framework Introduction Using C# - Part One

10 Jun 2016 by Emiliano Musso

In this article, we will see how to use entity framework in our Applications, developed through the various languages that Visual Studio allows us to use. The examples in this article and probably in the next, will be C # used under WinForms, but - as mentioned - this choice is not going to affect a

entity-framework

Entity framework with oracle views

27 Jan 2015 by Member 10837197

I have a problem using EF with oracle views , or views generally , I can easily retrieve data from views through my Entity(which has views only no tables) , but I can't insert/ update or delete any records giving me the below error : "The table/view does not have a primary key defined. The...

Entity Framework, Hybrid Approach

1 Jun 2017 by Sherjil_Ahmed

Mixing DB-First and Code First Approach for using SPs in EF-Way

entity-framework

Entity Framework- DB first Approach

27 Aug 2015 by SPASWIN

Hi,i am using db first approach in my application, i need to map the city_master_table entity results into my custom business model. i am unable to map the custom business model into city_master_table. Can anyone help me to find the solution.Table : city_master_tableColumns: City_PID,...

Entity Framework. Get entity with a part of properties filled

6 Mar 2015 by Nick R-Negative

Hi! I need to know how to fetch entities, but only with a part of properties, not the whole entity. I used to invoke DbContext.Set().QuerySql(), but it fails to construct a proper entity since it needs ALL the entity properties in an internal data reader. How to get only partial entities?

Entity Framework. Get entity with a part of properties filled

6 Mar 2015 by Dave Kreskowiak

You don't. In EF you only get the entire entity stored in the database re-hydrated in the DbContext tacker.You can use projection to get just the properties you need copied into another object, but the database is still going to return the entire entity record and the DbContext is still...

Entity relationships design

23 Jun 2015 by Member 9168963

Which is better with Entity Framework , code first or database first ?Why and when is it better? Thank you,