Entity Framework - am I right?

“Conversion overflow” when reading numeric data from MS SQL database using Entity Framework

This article explains how to fix a weird situation where your .NET application utilizing Entity Framework or Entity Framework Core simply crashes without any way to recover or catch the Exception. You only get errors somewhere along the lines of “conversion overflow”. Ah – what a fun little issue! Problem So when you’re trying to instantiate an entity with a property of type decimal, you’ll get one of the 2 following exceptions with varying Call Stacks: Conversion overflow or: Arithmetic overflow error converting numeric to data type numeric…Continue reading “Conversion overflow” when reading numeric data from MS SQL database using Entity Framework

One does not simply use just one DbContext with multiple ConnectionStrings in Entity Framework Core.

How to implement multiple Connection Strings for one DbContext in EF Core?

Recently, while building an app service to host a .NET Core API, I had to implement the logic for using both Read-Only and Read-Write Database Contexts for Entity Framework Core. In this particular case, it was the same database – just different contexts, because depending on the location of the app service the app was deployed in, read and write operations might actually go to different database instances, That’s really easy, right? Well… Yes and no. Essentially, it’s easy to spin up, but comes with…Continue reading How to implement multiple Connection Strings for one DbContext in EF Core?

C# & .NET

How to get the EF Core Connection String?

This article describes how to access and extract the connection strings from your Entity Framework (Core) database context objects. This is quite convenient if you need to display or log the connection string used for your current DbContext for some reason – or if you somehow form your DbContext objects dynamically, and need to verify which connection string you’re using. I’m sure there are other use cases, too. You probably have an interesting one, if you landed on this page! Problem A while ago, I…Continue reading How to get the EF Core Connection String?

Miina (@minepupper) is fixing them bugs

EF Core returns null for a Navigation property

This article describes how to fix a situation, where you can’t use any of the navigation properties of your Entity Framework Core entities, since they are all null, despite data being in the database for sure. So, another day, another error. This time I can’t blame SharePoint, since I just messed up with ASP.NET Core and Entity Framework Core. :) Symptoms No matter what I’d do, I was getting null values for my navigation properties on my entities. They’d would always be null during runtime…Continue reading EF Core returns null for a Navigation property