C#•3y ago

❔ How do I restrict user from using numbers in Name

bool newSt = true;


while (newSt)
    try
    {


        Console.WriteLine("Please enter the number of users you want to enter");


        int iUsers = Convert.ToInt32(Console.ReadLine());



        string[,] array = new string[iUsers, 3];
        for (int i = 0; i < iUsers; i++)
        {
            Console.Write("Please enter your name: ");
            string sUsrName = Console.ReadLine();
            Console.Write("Please enter your nationality: ");
            String sUsrNationality = Console.ReadLine();

            Console.Write("Please enter your city: ");
            string sUsrHome = Console.ReadLine();

            array[i, 0] = sUsrName;
            array[i, 1] = sUsrNationality;
            array[i, 2] = sUsrResidence;
            Console.WriteLine($"Name: {array[i, 0]}\nNationality: {array[i, 1]}\nCity: {array[i, 2]}");
            newSt = false;
        }
    }
    catch (SystemException)
    {
        Console.WriteLine("\n----Incorrect input, please try again----\n");
        
    }

bool newSt = true;


while (newSt)
    try
    {


        Console.WriteLine("Please enter the number of users you want to enter");


        int iUsers = Convert.ToInt32(Console.ReadLine());



        string[,] array = new string[iUsers, 3];
        for (int i = 0; i < iUsers; i++)
        {
            Console.Write("Please enter your name: ");
            string sUsrName = Console.ReadLine();
            Console.Write("Please enter your nationality: ");
            String sUsrNationality = Console.ReadLine();

            Console.Write("Please enter your city: ");
            string sUsrHome = Console.ReadLine();

            array[i, 0] = sUsrName;
            array[i, 1] = sUsrNationality;
            array[i, 2] = sUsrResidence;
            Console.WriteLine($"Name: {array[i, 0]}\nNationality: {array[i, 1]}\nCity: {array[i, 2]}");
            newSt = false;
        }
    }
    catch (SystemException)
    {
        Console.WriteLine("\n----Incorrect input, please try again----\n");
        
    }

7 Replies

Slem POP•3y ago

now in the part where i ask for name nationality and residence how do i restrict user from entering numbers?

LPeter1997•3y ago

Once the user pressed return, you need to run a validation method on it to check that it only contains what you want. If invalid, you prompt that to the user and re-ask them for the data.

Slem POP•3y ago

Thanks but how tho. Couldnt find any useful guide online.

LPeter1997•3y ago

The general scheme is

string name;
do
{
    Console.Write("Enter a name: ");
    name = Console.ReadLine();
} while (!IsValidName(name));

string name;
do
{
    Console.Write("Enter a name: ");
    name = Console.ReadLine();
} while (!IsValidName(name));

You need to write IsValidName based on your requirements If you need to check if a string contains no numbers, you can use char.IsDigit on each letter in the string

Slem POP•3y ago

Ok I'm done for today. Thank you tho.

ero•3y ago

name.Any(char.IsDigit) when

Accord•3y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How do I restrict user from using numbers in Name