REST WCF Service - Consume QueryString Parameters

I have this REST WCF service.

[WebInvoke(UriTemplate = "/GetNames/{Category}?order=asc", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)] 
public List<Names> GetNames(string Category)
{
    //Code to retrieve Names by category.
}

The Category parameter is mapped to {Category} in the Uri.

But how can I map the order query string in the Uri to this method?

Adding the order as a parameter method is not worki开发者_Go百科ng.

please help. thanks in advance.

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Have you tried - "/GetNames/{Category}?order={ordering}" in the Uritemplate and in the function

public List<Names> GetNames(string Category, string ordering)
{
  //Code to retrieve Names by category.
}