使用正则表达式验证邮箱格式

实现效果:

  

知识运用:(下图中好像多了个'(' )

  

 实现代码:

        private void button1_Click(object sender, EventArgs e)
        {
            if (validate(textBox1.Text))
                textBox1.BackColor = Color.Green;
            else
                textBox1.BackColor = Color.Red;
        }
        public bool validate(string str_email) { 
            return System.Text.RegularExpressions.Regex.
                IsMatch(textBox1.Text,
            @"^(([w.]+)@([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}])|((w+.?)+)@([a-zA-Z]{2,4}|[0-9]{1,3})(.[a-zA-Z]{2,4}))$");
        }
原文地址:https://www.cnblogs.com/feiyucha/p/10052886.html