I want to check if the user input is in my array. If it's not it shall write "Invalid input". The line reading already works. I just want to check this. But like I did it, it doesn't work. I heard that I shall use a for loop. But how?
[...]
char[] menuChars = { 'e', 'E', 'l', 'L', 'k', 'K', 't', 'T', 's', 'S', 'b', 'B' };
if (userKeyPress == !menuChars)
{
Console.WriteLine("Please insert a valid char: ");
}
Console.ReadLine()
[...]
I'd rather change the collection type from array to HashSet<Char>:
HashSet<Char> menuChars = new HashSet<Char>() {
'e', 'E', 'l', 'L', 'k', 'K', 't', 'T', 's', 'S', 'b', 'B'
};
...
Char userKeyPress;
// and condition check from "if" to "do..while"
// in order to repeat asking user until valid character has been provided
do {
Console.WriteLine("Please insert a valid char: ");
// Or this:
// userKeyPress = Console.Read();
userKeyPress = Console.ReadKey().KeyChar;
}
while (!menuChars.Contains(userKeyPress));
Console.Read(); or Console.ReadKey().KeyChar;; I'm sorry for typo.Try:
using System.Linq;
...
if (!menuChars.Contains(userKeyPress))
...
You can try lik ethis:
if(menuChars.Contains(userKeyPress))
{
Console.WriteLine("Found");
}
else
{
Console.WriteLine("Not Found");
}
or like this:
if(Array.IndexOf(menuChars, userKeyPress) > -1)
{
Console.WriteLine("Found");
}
else
{
Console.WriteLine("Not Found");
}
if(!menuChars.Contains(userKeyPress))?menuCharsis a one-dimensional zero-indexed array, you will have to do eitherif (Array.IndexOf(menuChars, userKeyPress) == -1)orif (!((ICollection<char>)menuChars).Contains(userKeyPress)). Those are the .NET 2.0 ways.