forcing to ignore some url parameters

Question

I am making an iPhone app where I am using .NET webservice.

Let's say below is the URL I have.

http://www.myweb.com/wser.asmx/listOfStudents?class=12

Here I was getting list of students with below fields in it.

Name
Roll Number
Class

Now client asked to make arabic version. So we update the query to below.

http://www.myweb.com/wser.asmx/listOfStudents?class=12&appLang=ar
                                                      ^^^^^^^^^^^^

For testing we update webservice on another server & checked and all is working fine.

Now while uploading app on App store, I noticed if I update actual webservice current app won't work as appLang variable is missing in current app that is there on app store.

If I don't update webservice & apple go in testing, the app will crash as it will throw error of missing parameter appLang.

So what I was thinking is,

I will upload new webservice, BUT appLang will be arabic BY-DEFAULT.

Like if I execute url http://www.myweb.com/wser.asmx/listOfStudents?class=12 with updated webservice (appLang added in webservice but not in url), it will not throw error of parameter missing appLang?

Is there any way to make default parameter?

Answer 1

while using GET isn't that pretty in this case (POST could be more suitable), you could do this :

//by specifying a messageName, you can do overloading with webmethods
[WebMethod (MessageName = "listOfStudentsDefault")]  
[ScriptMethod(UseHttpGet=true)]
public string listOfStudents(int class, string appLang)
{
    // code here...
}

[WebMethod (MessageName = "listOfStudents")]  
[ScriptMethod(UseHttpGet=true)]
public string listOfStudents(int class)
{
    return listOfStudents(class, "ar");
}