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;         }