利用正则表达式验证手机或电话号码

privatevoid btnTest_Click(object sender, EventArgs e)
        {
            //using System.Text.RegularExpressions;　先using这一段

            string _Result= "";
            string _Pattern= @"(?:13\d|15[89])-?\d{5}(\d{3}|\*{3})";
             Match m= Regex.Match(txtMobile.Text, _Pattern);           

            if (m.Groups.Count> 1)//表示能匹配到有效的手机号码 比如为:13016752109 不包含区号　
          {
                 _Result= m.Groups[0].Value;
             }
            else
           {
                 _Pattern= @"(([0\+]\d{2,3}-)?(0\d{2,3})-)(\d{7,8})(-(\d{3,5}))?";
                 m= Regex.Match(txtMobile.Text, _Pattern);
                if (m.Groups.Count> 1)//表示能匹配到有效电话号码 有效格式为:区号(2-3位)-电话号码(7-8位)-分机号(3-5位)　分机号可选
              {
                     _Result= m.Groups[0].Value;
                 }
             }

            if (_Result!= "")
          {
                 MessageBox.Show("有效的电话/手机号为:"+ _Result);
             }
            else
          {
                 MessageBox.Show("无效的电话/手机号码,请重新输入");
             }
           
         }