winforms text box that accepts max 5 characters and the first letter must be the alphabet 'a'

Why dont you use Regular Expression ?

Use

"[Aa]\w{0,4}"

Check this on Keypress/textchanged or any event of a textbox.

www.abhisheksur.com

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Abi can you give him a full detail example , because i suspect he does not know how to do what you said

Thank you for posting at Dotnetfunda
[Administrator]

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I think you are right.

Regex expression = new Regex("[Aa]\w{0,4}");

return expression.Match(Textbox1.Text);

I think something like this is he require.

I am still waiting for the user to get back with this. :)
I dont know if the user already found the solution or not, and what event the user is handling etc.

www.abhisheksur.com

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Hi,
use the following code to check the Length and character in winforms based on your condition..

private void button1_Click(object sender, EventArgs e)
{
string txtvalue = textBox1.Text;
if (txtvalue.Length < 5 || txtvalue.Length >5)
{
MessageBox.Show("Text Lenght should be 5 characters");



}
if (!char .IsLetter (txtvalue [0]))
{
MessageBox.Show("First Letter should be character");
}

}

Syed Shakeer Hussain

Kishore, if this helps please login to Mark As Answer. | Alert Moderator

This is very manual..
Though it works, but its not Smart coding .. :D :D

www.abhisheksur.com

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