CODEWITHSUNDEEP
c#-4.0boolean.net-4.5optional-parameters
GilliVilla
GilliVilla

Reputation: 5090

Conditional usage of Optional Parameter

I have the classes : 

public class Result{
    public string Name {get; set;}
    public string Category {get; set;}
    }

public SearchResults {
    public string PageNum {get; set;}
    public string PageSize {get; set;}
    public string TotalCount {get; set;}
    public IEnumerable<Result> Results {get; set;)
    }

I have the method: 

public SearchResults GetSearchResults(bool full = false)
{
    return new SearchResults {
       PageNum = 1,
       PageSize = 25,
       TotalCount = 100,
       Results = new[] {new Result {Name="Alpha", Category="Bravo"}}
      // return Results only if parameter [full] is true ???How
    };
}

In the above method, I want to return [Results] only if the [full] parameter is true. And by default not return it.

Upvotes: 0

Views: 35

Answers (1)

Habib
Habib

Reputation: 223292

You can use Conditional operator and return null for result like:

Results = full ? new[] { new Result { Name = "Alpha", Category = "Bravo" } } : null,

By default since Result is a property it will be assigned null (default).

So your method would be like:

public SearchResults GetSearchResults(bool full = false)
{
    return new SearchResults
    {
        PageNum = 1,
        PageSize = 25,
        TotalCount = 100,
        Results = full ? new[] { new Result { Name = "Alpha", Category = "Bravo" } } : null,
    };
}

Upvotes: 1

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