Return Empty String Instead of Null

Question

I am using ef core and mapster. I have some columns in my db that are nullable.

When I get them from the db, C# stores them as nulls(which makes sense). I want to return these fields are empty strings though when I send them back via my api.

public class CompanyDto
    {

        public string Website { get; set; }
    }


 public class Company
    {
        public int Id { get; set; }
        public string Website { get; set; } = "";
    }

company.Adapt<CompanyDto>()

what is the best way to make it so Website in the CompanyDto is an empty string.

What about [custom mapping](https://github.com/MapsterMapper/Mapster/wiki/Custom-mapping) and then something like `src => src ?? string.Empty`? — Peter Bons, Jul 08 '18 at 07:37

Fabio · Accepted Answer · 2018-07-09T22:17:49.380

0

Classic setter will do the job as well

public class Company
{
    public int Id { get; set; }

    private string _website;
    public string Website 
    { 
        get { return _website; }
        set { _website = value ?? string.Empty; }
    };

    public Company ()
    {
        _website = string.empty;
    }
}

edited Jul 09 '18 at 22:17

answered Jul 08 '18 at 19:03

Fabio

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This did not seem to work, I put a breakpoint and it was never triggered, so maybe it being bypassed somehow. I moved the check to the get method and that will work. – chobo2 Jul 09 '18 at 21:41
Seems like mapster simply skip property if original value is null. You can set default value in constructor. – Fabio Jul 09 '18 at 23:22

Return Empty String Instead of Null

1 Answers1