How to update not every fields of an object using Entity Framework and EntityState.Modified

by

Let’s assume that you have a collection of the properties to be excluded:

var excluded = new[] { "property1", "property2" };

With EF5 on .NET 4.5 you can do this:

var entry = context.Entry(obj);
entry.State = EntityState.Modified;
foreach (var name in excluded)
{
    entry.Property(name).IsModified = false;
}

This uses a new feature of EF5 on .NET 4.5 which allows a property to be set as not modified even after it has been previously set to modified.

When using EF 4.3.1 or EF5 on .NET 4 you can do this instead:

var entry = context.Entry(obj);
foreach (var name in entry.CurrentValues.PropertyNames.Except(excluded))
{
    entry.Property(name).IsModified = true;
}

More Related Contents:

  1. Code-first vs Model/Database-first [closed]
  2. The relationship could not be changed because one or more of the foreign-key properties is non-nullable
  3. Should I enable or disable dynamic proxies with entity framework 4.1 and MVC3?
  4. How do I detach objects in Entity Framework Code First?
  5. ADO.NET DbContext Generator vs. ADO.NET Poco Entity Generator (ObjectContext)
  6. How to include a child object’s child object in Entity Framework 5
  7. Order navigation properties when using Include and/or Select methods with EF 4.1 Code-First?
  8. Entity framework code-first null foreign key
  9. How do you ensure Cascade Delete is enabled on a table relationship in EF Code first?
  10. Ramifications of DbSet.Create versus new Entity()
  11. Entity Framework 4.1 default eager loading
  12. How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?
  13. EF Code First DBContext and Transactions
  14. Entity Framework Code First : Setting up One-To-One foreign key association using Annotations
  15. EF 4.1 loading filtered child collections not working for many-to-many
  16. Entity Framework Validation confusion – maximum string length of ‘128’
  17. Using the Entry().CurrentValues.SetValues() is not updating collections
  18. Entity Framework Code First Many to Many Setup For Existing Tables
  19. ASP.NET MVC 2.0 Implementation of searching in jqgrid
  20. Unique Key constraints for multiple columns in Entity Framework
  21. Database first create entity framework 6.1.1 model using system.data.sqlite 1.0.93
  22. “like” queries in Entity Framework
  23. Entity framework PostgreSQL
  24. EF can’t infer return schema from Stored Procedure selecting from a #temp table
  25. MetadataException when using Entity Framework Entity Connection [duplicate]
  26. Keyword not supported: “data source” initializing Entity Framework Context
  27. How to map Table per Type (TPT) inheritance in Entity designer?
  28. Entity Framework: Inheritance and Include
  29. Entity Framework – Get List of Tables
  30. Entity framework code first delete with cascade

Leave a Comment