最近再学习一下正则表达式 写了个小工具自己测试

private void textBox2_TextChanged(object sender, EventArgs e)
{
if (textBox2.Text != "" && textBox1.Text!="")
{
if (checkBox1.Checked)
{
textBox3.Text = "";
}
try
{
MatchCollection c = Regex.Matches(textBox2.Text, textBox1.Text);
foreach (Match item in c)
{
textBox3.Text = textBox3.Text + item.Value + "\r\n";
}
}
catch (Exception ex)
{
textBox3.Text = textBox3.Text + ex.Message + "\r\n";
}
textBox3.SelectionStart = textBox3.Text.Length; //使滚动条在最下
textBox3.ScrollToCaret();
}
}

private void button1_Click(object sender, EventArgs e)
{
textBox3.Text = "";
}