check at input type of user

Question

0.00/5 (No votes)

See more:

now if user enter a,b,c,0 whatever not operational choice 1,2,3,4.... then i want to show message invalid after geting user choice...how i can execute statement... hope u understand

VB

Console.WriteLine("Enter your Choice for Data Operation");
            Console.WriteLine("1. Insert Data into Table");
            Console.WriteLine("2. Update Data into Table");
            Console.WriteLine("3. Delete Data from Table");
            Console.WriteLine("4. Display All Data of Table\n");

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

            switch (choice)
            {
                case 1:
                    Console.WriteLine("\n");
                    conn.InsertData();
                    Console.WriteLine("\n");
                    conn.GetData();
                    break;

Posted 19-Sep-13 1:50am

Innocent910

Updated 19-Sep-13 2:04am

v2

Add a Solution

Comments

ZurdoDev 19-Sep-13 7:53am

What? int.Parse will return a integer. If you want to make sure they entered an integer use Int32.TryParse instead.

Innocent910 19-Sep-13 8:04am

now if user enter a,b,c,0 whatever not operational choice 1,2,3,4.... then i want to show message invalid after geting user choice...how i can execute statement... hope u understand

Innocent910 19-Sep-13 8:04am

Console.WriteLine("Enter your Choice for Data Operation");
Console.WriteLine("1. Insert Data into Table");
Console.WriteLine("2. Update Data into Table");
Console.WriteLine("3. Delete Data from Table");
Console.WriteLine("4. Display All Data of Table\n");

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

switch (choice)
{
case 1:
Console.WriteLine("\n");
conn.InsertData();
Console.WriteLine("\n");
conn.GetData();
break;

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ankita M · Answer 1 · 2013-09-19T01:52:00

Solution 1

check the ASCII value of input

Posted 19-Sep-13 1:52am

Ankita M

hypermellow · Answer 2 · 2013-09-19T01:56:00

Something like this perhaps?

C#

int choice;
if(int.TryParse(Console.ReadLine, out choice)){
    switch (choice)
            {
                case 1:
                    Console.WriteLine("\n");
                    conn.InsertData();
                    Console.WriteLine("\n");
                    conn.GetData();
                    break;

}
else{
    Console.WriteLine("PLease enter an integer value!");
}

Int.TryParse[^]