C#中使用正则

using System.Text.RegularExpressions;

private void button1_Click(object sender, EventArgs e)

{

string regPartten = textBox1.Text;

Regex reg = new Regex(regPartten, RegexOptions.IgnoreCase | RegexOptions.Multiline);

Match m = reg.Match(textBox2.Text);

if (m.Success)

{

textBox3.Text = m.Groups[1].Value;

}