Updating Entity Framework Objects with Changed Data

Updating Entity Framework Objects with Changed Data

You've got a class that accepts an object from a client (perhaps, that class is an ASP.NET MVC Controller). Here's the simplest way to update the related Entity Framework object with the client's data before saving it to your database.

Assuming you're using the latest version of Entity Framework, the easiest way to update your database is to use DbContext's Entry class: It's just two lines of code no matter how many properties your object has.

As an example, here's some code that accepts an object holding updated Customer data, retrieves the corresponding Customer entity object from the database, and then gets the DbEntityEntry object for that Customer object:

public void UpdateCustomer(Customer custDTO)
{
   CustomerEntities ce = new CustomerEntities();
   Customer cust = ce.Customers.Find(custDTO.Id);
   if (cust != null)
   {
    DbEntityEntry<Customer> ee = ctx.Entry(cust);

Now that you have the Entry object for the object you retrieved from the database, you can update the current values on that retrieved entity object with the data sent from the client:

ee.CurrentValues.SetValues(CustomerDTO);

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