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Accepts one of 1, 2, x or X, or nothing

Richard Holm answered on May 7, 2022 Popularity 1/10 Helpfulness 1/10

answer Accepts one of 1, 2, x or X, or nothing

Accepts one of 1, 2, x or X, or nothing

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private Boolean patternIsMatch(String text) {
	// Alternatives; one of 1, 2, x or X, or nothing is accepted pattern.
	Regex pattern = new Regex(@"^([12xX]{1}|^)$");
	return pattern.IsMatch(text);
}
private void textBoxAnswer_TextChanged(object sender, EventArgs e) {
	if (!patternIsMatch(textBoxAnswer.Text)) {                
		MessageBox.Show(textBoxAnswer.Text + " = Felaktigt värde");
		textBoxAnswer.Text = "";
	}
}

Popularity 1/10 Helpfulness 1/10 Language csharp

Source: Grepper

Tags: c# nothing

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Contributed on May 07 2022

Richard Holm

0 Answers Avg Quality 2/10

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Accepts one of 1, 2, x or X, or nothing

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