How can I iterate through each variable in a model object.

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I have a frontend that sends a model to a API which I catch with a endpoint in a controller, lets call this the updated model. I then use the id send with the model to get the original model from the db using a Repo. My questions is, is there a way to iterate through each variable (using a loop) in the model in order for me to assign the updated model info to the original model in order to do a DBContext.SaveChanges().

What I have tried:

What works is:

C#

originalModel.name = updatedModel.name;

And also

C#

originalModel.Settings.maxVolt = updatedModel.Settings.maxVolt;

.
What does not work is:

C#

originalModel = updatedModel;

Posted 1-Oct-21 1:51am

W3Tronics

Updated 3-Oct-21 20:40pm

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2 solutions

Solution 1

I expect you'll need to write a Model.SetFrom(Model src) method to perform a deep copy. Also see MemberwiseClone()[^]. Simply copying a reference doesn't perform a deep copy.

Remember, MemberwiseClone() performs a shallow copy of each member.

/ravi

Posted 1-Oct-21 10:13am

Ravi Bhavnani

Updated 1-Oct-21 10:15am

v2

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W3Tronics · Accepted Answer · 2021-10-03T20:40:00

Solution 2

At the end of the day I just used

C#

dbContext.Update(T entity)

in the Repo, passing the updated model. Since the updated model and the original model have the same id, entity framework could track it. Then after the update I did a save the db.

C#

dbContext.SaveChanges();

Posted 3-Oct-21 20:40pm

W3Tronics