validate a textbox-error provider

Violeta Popa

Hi! i want to validate a textbox, where the email is introduces. First i check if the email is too short, and it works, then i try to check if it ends with @yahoo.com or @gmail.com but it doesn't work fine. I guess it's a problem with Substring. Any help? thks.

private void emailTxt_Validating(object sender, CancelEventArgs e)

{

string mesaj = null;

string email = emailTxt.Text;

int lungime = email.Length;

if (lungime < 11)

{

mesaj = "E-mail prea scurt!";

this.errorProvider1.SetError(this.emailTxt, mesaj);

}

else

{

string text = email.Substring(lungime - 12, 10);

if (text != "@yahoo.com" || text != "@gmail.com")

{

mesaj = "E-mail: [email protected] sau [email protected]!";

this.errorProvider1.SetError(this.emailTxt, mesaj);

}

1 Reply

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Vulpes13y ago
Accepted answer
I can see a couple of issues there.

Try this instead:

private void emailTxt_Validating(object sender, CancelEventArgs e)
{
string mesaj = null;
string email = emailTxt.Text.Trim();
int lungime = email.Length;

if (lungime < 11)
{
mesaj = "E-mail prea scurt!";
this.errorProvider1.SetError(this.emailTxt, mesaj);
}
else
{
if (!email.EndsWith("@yahoo.com") && !email.EndsWith("@gmail.com"))
{
mesaj = "E-mail: [email protected] sau [email protected]!";
this.errorProvider1.SetError(this.emailTxt, mesaj);
}
}
}