How to send NULL in HTTP query string?

Question

I\'m developing an API that can accept the main three data types as values to query string parameters: boolean, string & numeric (

Answer 1

Send a URLEncoded NUL value (%00) for any thing that you're specifically setting to null. It should be correctly URL Decoded.

Answer 2

or just don't send any value. leave query param value empty in your get request url.. like -

API URL/?foo=&some_other_param=value

in the API foo will be received as null

Answer 3

With IIS and C#, I send it this way:

?param=#