How to track which entities are updated in Entity Framework

Question

I am working on an eCommerce based web application with MVC and Entity Framework. I just want to track/know which entities are updated. For example, when the user changes the stock and price for any product and clicks the Save button, I want to track that these two entities are updated with their ProductId .

Is there any way to achieve this?

Thanks.

Answer 1

Disclaimer : I'm the owner of the project Entity Framework Plus

This project allows to audit / track everything what's is modified. There is a lot of options available if you only want to access modified entities.

// using Z.EntityFramework.Plus; // Don't forget to include this.

var ctx = new EntityContext();
// ... ctx changes ...

var audit = new Audit();
audit.CreatedBy = "ZZZ Projects"; // Optional
ctx.SaveChanges(audit);

// Access to all auditing information
var entries = audit.Entries;
foreach(var entry in entries)
{
    foreach(var property in entry.Properties)
    {
    }
}

Documentation: EF+ Audit

NuGet: https://www.nuget.org/packages/Z.EntityFramework.Plus.EF6/

Answer 2

You can use rowversion if it is not in the same http request.

http://www.asp.net/mvc/overview/older-versions/getting-started-with-ef-5-using-mvc-4/handling-concurrency-with-the-entity-framework-in-an-asp-net-mvc-application

Answer 3

Yes you can with this

//let 'myObj' is entity instance
//let db is your context instance
if ( db.Entry(myObj).State == System.Data.EntityState.Modified )
{
 //Try your code here
}