C# 通过身份证查询出生日期

 private int GetAgeBycode(string b_car_code)

         {

             string birthday = "";

             //处理18位的身份证号码从号码中得到生日和性别代码

             if (b_car_code.Length == )

             {

                 birthday = b_car_code.Substring(, ) + "-" + b_car_code.Substring(, ) + "-" + b_car_code.Substring(, );

             }

             //处理15位的身份证号码从号码中得到生日和性别代码

             if (b_car_code.Length == )

             {

                 birthday = "" + b_car_code.Substring(, ) + "-" + b_car_code.Substring(, ) + "-" + b_car_code.Substring(, );

             }

             return birthday;

         }