How to remove an object property from an list/array?

Question

How can I remove a property from an list/array of a object?

My model contains:

 public string FirstName { get; set; }
 public string LastName { get; set; }
 public string Age { get; set; }
 public string Size { get; set; }

And i'm converting this to JSON with

string json = JsonConvert.SerializeObject(client);

And all works fine... I got all propertys of the object in JSON.

But I need to create two levels of acess, and show all info in one level, and the other level, fewer propertys...

My question is: Can I remove a property of an object?

Someting like this:

List<Customer> customers = new List<Customer>();
//(and this have 100 clients inner)

customer.removeProperty(Age, Size); // Can I have someting like this?

Do you want to remove the property from the model or only from the JSON? If the latter: you can use the attribute `JsonIgnore`([see here](https://www.newtonsoft.com/json/help/html/PropertyJsonIgnore.htm)) — mu88, Nov 14 '19 at 13:27
check this. Hope it is duplicate https://stackoverflow.com/questions/10169648/how-to-exclude-property-from-json-serialization — Jayakumar Thangavel, Nov 14 '19 at 13:27
https://learn.microsoft.com/en-us/dotnet/api/system.web.script.serialization.scriptignoreattribute?redirectedfrom=MSDN&view=netframework-4.8 — Jayakumar Thangavel, Nov 14 '19 at 13:30
Does this answer your question? [How to exclude property from Json Serialization](https://stackoverflow.com/questions/10169648/how-to-exclude-property-from-json-serialization) — Arijit Mukherjee, Nov 14 '19 at 13:35

Ross Gurbutt · Accepted Answer · 2019-11-14T13:48:42.560

3

Try using the json ignore tag above the property. E.g.:

[JsonIgnore]
public string Age { get; set; }

If you want to be able to serialise both with and without certain properties, without altering the structure of your actual classes, you could try using the example here.

edited Nov 14 '19 at 13:48

answered Nov 14 '19 at 13:24

Ross Gurbutt

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One question, this wont go ignore in the two cases? (two access) – Drakron Nov 14 '19 at 13:37
Sorry, misread your question, I've edited my answer to include an example of how to do it dynamically without altering the existing classes. – Ross Gurbutt Nov 14 '19 at 13:38

score 0 · Answer 2 · answered Nov 14 '19 at 13:27

Create a new model with your fewer properties. Make two lists, one with all the properties and the other with the properties you want removed.

For example

public YourModelNow
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Age { get; set; }
    public string Size { get; set; }
}

public YourModelNowFiltered
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

This is assuming you need two file.json with the different properties. If you just need to ignore the properties use Ross Gurburts approach.

I thought about that :/ but i'm in the deadline day and the real code are really complex with more than 100 propertys... and to populate again all this will gonna be really hard :/ — Drakron, Nov 14 '19 at 13:33

score 0 · Answer 3 · answered Nov 14 '19 at 13:52

i would suggest using AutoMapper

you will need to create a DTO [Data Transfer Object] class which would have the properties that you would like to expose

the usage is pretty simple:

in the config:

var config = new MapperConfiguration(cfg => {
            cfg.CreateMap<YourModel, YourModelDTO>();
        });

in the actual usage:

IMapper iMapper = config.CreateMapper();
var source = new YourModel();
var destination = iMapper.Map<YourModel, YourModelDTO>(source);

for more information and example of what AutoMapper could do read here

How to remove an object property from an list/array?

3 Answers3