Question

I’m using a TextBox to enter user’s name, here I want to validate that box only having alphabets which is starting with capital and continues with simple letters. For that I use the following code, even though its validating but if I enter a number after some alphabates it is not identifying that, please some one help me to find the problem.

if (!Regex.IsMatch(textBox3.Text, @"[a-zA-Z]"))
{
    errorProvider2.SetError(textBox3, "Only use alphabates");
}

Answer 1

This will work. Satisfies all your conditions:

@"^[A-Z]{1}[a-z]+$"

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[A-Z]{1}– Matches the first letter to uppercase and only once.
[a-z]+ – Matches only lower case letters one or more times
$ – Marks the end of string, so numbers aren’t matched any more