Using entity framework database first, where should I create a simple column calculation?

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Hi,

I'm developing a C# application using Entity Framework database first, since I already have an existing database which I want to analyze.

The table that I'm using has a "Target" column and a "Actual" column and I need to determine the progress, which would be Actual/Target.

Where should this data be? Should I create a new column with this formula in my database (SQL Server btw), or should I do this calculation in my code? If the latter option is the best one, then how would I change my model that was created automatically by entity framework?

What I have tried:

Creating a formula column, but don't know if it's best practice

Posted 29-May-19 7:56am

RuiBarreiros

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Richard Deeming 29-May-19 14:01pm

Will you be trying to query this calculated property? (Filter, sort, etc.)

If so, then it will need to be a calculated column in the database.

If not, a custom read-only property in your C# class would work. The entities generated from your database will be in partial classes, so you can create a separate file to hold your custom code which won't be overwritten by the designer.

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