asp.net web api - How do I Get with using string parameter? -

i have web api method using ef6 , accepting int parameter called serial. instead of primary key serial want find extserial uri.

here have localhost/api/ah?serial=1

// api/ah/5         [responsetype(typeof(transmital))]         public ihttpactionresult gettransmital(int serial)         {             transmital transmital = db.transmitals.find(serial);             if (transmital == null)             {                 return notfound();             }              return ok(transmital);         } 

i need have localhost/api/ah?extserial=abc123

for reason won't take following

// api/ah/5         [responsetype(typeof(transmital))]         public ihttpactionresult gettransmital(string extserial) //or [fromuri]string extserial         {             transmital transmital = db.transmitals.find(extserial);             if (transmital == null)             {                 return notfound();             }              return ok(transmital);         } 

you should use ihttpactionresult interface.

try this:

public ihttpactionresult gettransmitalsextserial([fromuri] string extserial)         {             //return ok(extserial.tostring());             return ok(db.transmitals.where(exs => exs.extserial == extserial));         }