Entity Framework 6 not updating from database correctly in VS 2019

Entity Data Model in Ado.Net Isn't Updating Correctly

I had a similar problem. The reason was pretty simple. I've forgotten to set a primary key in one of my tables. Hope it helps.

How do you properly update an Entity Model following a database schema change?

I've made some changes in the table structure and especially the relationships between tables in my SQL Server database. Now I want to update my Entity model based on this new database structure....Right clicking on the edmx file I find the option "Update model from database". But when I do this I get kind of a 50% update: The new columns appear in...

Linq to Entities vs. Linq to SQL vs. Entity Framework

There are two ways of writing queries with Entity Framework:...Linq to Entities ( ...http://msdn.microsoft.com/en-us/library/bb386964.aspx... )...Entity SQL ( ...http://msdn.microsoft.com/en-us/library/bb387145.aspx... )...L2E is not a separate technology, but rather a part of EF....Have a look at this article for a comparison: ...http://thedatafar...

Entity Framework foreign keys are not updated appropriately.

I am having trouble with foreign key relationships in the entity framework. I have two tables: ...Persons... and ...Countries.... ...Persons... has a foreign key column to ...CountryId.......As the ...Countries... table rarely changes, I want to fetch its data only once, dispose the ...DatabaseContext..., and keep the list of ...Countries... cached...

Database upgrade problem with DevExpress XPO, NHibernate, and Entity Framework

What is the best practice for upgrading the database using ...ORM... (...DevExpress XPO..., ...NHibernate... or ...MS Entity Framework...)?...I'm starting a new project and have to pick an ...ORM.... The development process requires of releasing intermediate test builds quite often and likely that each build will have changes in the database struct...

VS 2012 - EF 5.0 - Update Model from Database - Not picking up table changes

In Visual Studio 2010 EF 4, I could add a new column to a database table, then click 'Update Model from Database' on my .edmx and all was good in the world....In Visual Studio 2012 EF 5, I alter a table, and then click 'Update Model from Database' and it does not pick up the changes to individual tables anymore....Am I missing something ... or is t...

Entity Framework - CreateQuery VS ExecuteFunction VS ExecuteStoreQuery VS ExecuteStoreCommand

Very similar to ...CreateQuery... would be following:...var id = 42; using(var ctx = new Entities()){ var query = ctx.Companies.Where(o=>o.Id==id); var result = query.First(); } ...Before I call First() query is just a query. Nothing has been sent to the database. Only when data is asked will the query get executed and data retrieved. ...Writin...

error 2019: Member Mapping specified is not valid using Entity Framework Code First

Change your property to:...[Column(TypeName = "bit")] public bool status { get; set; } ...The native C# type ...bool... is specifically created to store true and false values. The ...bool... datatype maps to the SQL ...bit... datatype. ...The ...binary... SQL datatype is meant to store binary data like files or images. If you want to map to a C# pr...

update-database -force command is not updating the base in entity framework code -first

Using an Existing Database...Depending on the state of your context you need to the one of the following......IF YOUR DATABASE CONTEXT CONTAINS ONLY YOUR EXISTING TABLES AND NO CUSTOM CHANGES DO THE FOLLOWING...Add-Migration Initial -IgnoreChanges ...This will create a blank migration script...update-database ...This will update the database to thi...

In SQL Server, Entity Framework 6 vs. Dapper vs. stored procedures vs. requests

Code using EF exhibiting performance issues will not magically run faster with Dapper or ADO + Sprocs. To get to the bottom of the performance problem you need to investigate and eliminate the causes of the performance issues....At the top level, these performance issues stem from two core problems....Loading too much data....Loading data too often...