Question

In my application I am making a custom command line. I am looking for the best way to check user entered commands and argument agains the arguments I have defined. Take the following example command (which works if user enter it right and in order)

do>Drawer /X:Time /Y:Current /N:Window NAme /D:Description

Now I want to have a method to does the checking for me:

private string CheckDrawerArgs(string[] args)
{
    var mustExist = new string[4]{"X:", "Y:", "N:", "D:"};

    if(args.Length != mustExist.Length)
    {
        return "Arguments are not completly defined. use 'Drawer /?' for help.";
    }

    var argsAreRight = false;

    var flat = from s1 in args
               from s2 in mustExist
               where s1.StartsWith(s2) 

        //how to check if all elements provided 
        // in args does look 
        // like (Starts with) elements in mustExist

        ;
    if(argsAreRight == false)
    {
        return "Bad arguments";
    }

    //Proceed with rest...
}

So what I am looking for, is to check if required arguments which are provided by user, are in the args also they are not duplicated while the order of them would not effect the checking…

Looking forward for tips!

Answer 1

Further to Henk’s answer following is tested and working

 var allpresent = args.Length == mustExist.Length && args.All(c =>
                                                     mustExist.Any(e =>
                                                     c.ToString().StartsWith(e)));