Question

I have an object with 2 properties:

public class Request
{
    public int TypeId { get; set; }
    public bool isApproved { get; set; }
}

What I wish to happen is, if TypeId equals 1, I want isApproved to equal false, otherwise I want it to equal true when I create a new object. I tried the following but it was set to true for both of my objects, where I do the rule in the constructor:

public Request() {
    if(this.TypeId == 1) {
        this.isApproved = false;
    }
    this.isApproved = true;
}

var request = new Request() {
    TypeId = 1
}

var request2 = new Request() {
    TypeId = 2
}

I know why this occurred, its because TypeId hasn’t been set when the constructor is called, so it defaults to true. Is there anyway I can set this automatically once TypeId has been set on a newly created object?

Edit

I’d also like to have the option to change isApproved manually at a later date, so if it was set to false I can change it to true without the automatic rule I set affecting it

Answer 1

Try changing

public int TypeId { get; set; }

to

public int _typeId;

public int TypeId 
{
    get
    {
        return _typeId;
    }
    set
    {
        _typeId = value;
        isApproved = value != 1;
    }
}