CODEWITHSUNDEEP
c#
Mehdi Souregi
Mehdi Souregi

Reputation: 3265

Creating an anonymous object depending on parameters

To simplify the problem, I suppose that I have a method with two boolean parameters getParamA and getParamB.

public JsonResult MyMethod(bool getParamA, bool getParamB)

Is There a way like a ternary operator or something to say if getParamA == true and getParamB == false for example, I create an anonymous object like this :

//this is an entityframework query 
var result = entityContext.MyTable.Select(r=> new 
{ 
      paramA = r.paramA // because getParamA = true
      // don't create paramB because getParamB is false  
});

I know it is easy to implement this using two parameters (using if else condition) but things are getting complicated if we have more than 5 paramters (because you need to do all the testing)...

Upvotes: 1

Views: 79

Answers (1)

Patrick Hofman
Patrick Hofman

Reputation: 157116

You can, but it isn't really efficient code. It makes your code a complete mess:

.Select( r => getParamA && getParamB
              ? (object)new { A = r.A, B = r.B }
              : (getParamA ? new { A = r.A }
                           : (getParamB ? new { B = r.B }
                                        : null
                             )
                )
       );

A better option might be the ExpandoObject, which uses a dictionary internally to store its properties and values.

dynamic eo = new ExpandoObject();

if (getParamA)
{
    eo.A = r.A;
}

if (getParamB)
{
    eo.B = r.B;
}

Upvotes: 1

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