Winform之TextBox输入日期格式验证yyyy-mm-dd

private void button1_click(object sender, eventargs e)
        {
            string s = textbox1.text.tostring();
            bool b = validatedatatime(s);
            string rs = "";
            if (b)
            {
                rs = "true";
            }
            else
            {
                rs = "false";
            }
            messagebox.show(rs);
        }

        //验证方法-格式为：yyyy-mm-dd
        public static bool validatedatatime(string inputstr)
        {
            if (inputstr.length >0)
            {
                if(regex.ismatch(inputstr.trim(),@"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$"))
                {
                    return true;
                }
                else
                {
                    return false;
                }

            }
            return false;
        }

 

判断yyyy-mm-dd这种格式的，基本上把闰年和2月等的情况都考虑进去了
^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$  

下面的是加了时间验证的  

^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))   (20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d$