Why would this code display error even when it shouldn't?

August 9, 2022

I am sort of new to programming and I cannot get this simple looking code to work
What I am trying to do is make a login system that works on an array so its easier to edit and add new people onto the list.

string[] UserCodes = { "admin", "testcode" }; //these are the arrays
string[] UserWords = { "123", "testword" };

public void Button_Clicked(object sender, EventArgs e)
{
    for (int i = 0; i < UserCodes.Length; i++)
        if (UserCode.Text.Equals(UserCodes[i])  && UserWord.Text.Equals(UserWords[i]))
        {
            Navigation.PushAsync(new HomePage());
        }
    for (int i = 0; i < UserCodes.Length; i++)    
        if (UserCode.Text != (UserCodes[i]) || UserWord.Text !=(UserWords[i]))
        {
            DisplayAlert("Something Went Wrong", "Incorrect Password or Username", "Try Again");
        }   
}                   // And this is the "main" code

I believe the main problem arises from the second part, where it displays an error, because if I don’t enter the password correctly it works as it should but if I do enter correctly It sends me to the home page while still displaying the error. I have tried using else if, and i tried to use (!command.Equals(Array[i])). I am extremely confused as to why its acting this way.

>Solution :

Step through this code in the debugger. If you type in a correct UserCode and UserWord you will call Navigation.PushAsync(new HomePage())… and then keep going.

You next check if any UserWord or UserCode is not what you typed, and it will be, then show your error message.

You probably want to call return after Navigation.PushAsync(new HomePage()), or skip over the second for statement.