Question

it’s my first time to use this kind of action …using a loops with methods and stuff like that.

i would like to be able to loop through all parameters passed to ExcludeUsers()

say i have a few string type values ,

string user1 = "Anna";
string user2 = "Brenda";
string user3 = "John";
string user4 = "Warren";


      public bool ExcludeUsers(string OmittedUser1, string OmittedUser2, string OmittedUser3)
      {
          string userName = "John";


          //  i want to loop through all parameters passed in ...
          //  something like this 
          foreach (string param in params)
          {
              if(userName ==  param)
                return false;
          }
          return true;
     }

then i want to be able using

if(ExcludeUsers(user1, user2, user3))
//do some work

Answer 1

then you should pass it in as OmittedUsers[], an Array of string values instead

public bool ExcludeUsers(string[] OmittedUsers)
{
          string userName = "John";

          bool ConditionMet = true;

              foreach (string userToOmmit in OmittedUsers)
              {
                  ConditionMet =  string.Compare(userName, userToOmmit) == 0;

                          if (ConditionMet)
                          return false;
              }

    return ConditionMet;
}

Then you might want to use it like This:

if(ExcludeUsers(new string[]
                           {
                                user1,
                                user2,
                                user3,
                                user4
                           }
               )
  )
{

//do some work here...

}

you also want to consider if the strings that you try to compare
will also (might) have capital letters,

so you should be using .ToLower() when comparing string values
in general ..

though it really depends if the string should be case sensitive.

for example

if the scenario is that “abc” is valid being “ABC” or “Abc” (meaning your string is case Insensitive)

then you should, in that case the use :

//when "abc" = "ABC" is valid (case Insensitive)
ConditionMet =  string.Compare(userName.ToLower(), userToOmmit.ToLower())== 0;

if string values should be case sensitive :

//if the string "abc" = "Abc" is NOT the same for you, then
ConditionMet =  string.Compare(userName, userToOmmit) == 0;

which in your case seem to me that a username is case sensitive

… so you know your options.