Question

C#中怎样判断textbox中输入的值为正实数

Regex reg_xingcheng = new Regex(@"^[0-9]+(.[0-9]{1,3})?$");这个代码不行，望高手指点一下，谢谢

Answer 1

            string text = this.textBox1.Text.Trim();
            double d = 0d;
            if (double.TryParse(text, out d))
            {
                if (d > 0)
                {
                    //正实数
                }
            }
            else
            {
                //非法输入
            }

Answer 2

正实数正则表达式：^\d+?\d+(\.\d+)?$