ASP.NET 后台验证 TextBox 值是否为数字

记得最开始 using System.Text.RegularExpressions;

Regex m_regex = new System.Text.RegularExpressions.Regex("^(-?[0-9]*[.]*[0-9]{0,3})$");
            bool b =  m_regex.IsMatch("111");
            if (b == false)
            {
                Console.WriteLine("请填写数字");
                Console.ReadLine();
            }
            else
            {
                Console.WriteLine("正确的数字");
                Console.ReadLine();
            }