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}))$");
        }

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转载自www.cnblogs.com/feiyucha/p/10052886.html