Regular Expression Validation

Nov 23, 2008 Example Codes

I like to use regular expression validation. That is simple.
You only need to use:

Code

using System.Text.RegularExpressions

For the numeric value validation:

Code

Regex regex = new Regex(@"^[0-9]*$");
if (!regex.IsMatch(textBox1.Text))
{
MessageBox.Show("Invalid value, integer only!");
}

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	`Regex regex = new Regex(@"^[0-9]*$");`
	`if (!regex.IsMatch(textBox1.Text))`
	`{`
	`MessageBox.Show("Invalid value, integer only!");`
	`}`