得到一个人的年龄 [英] Get the age of a person

问题描述

我正在使用三个下拉列表来选择下拉列表返回值的日期(1998年9月12日)

我正在尝试计算年龄，但出现错误

HI I am using three drop downs to select the date the drop downs look return the values 1998 september 12

i am trying to calculate the age but get an error

ddlMonth.DataSource = Enumerable.Range(1, 12).Select(a => new
               {
                   MonthName = DateTimeFormatInfo.CurrentInfo.GetMonthName(a),
                   MonthNumber = a
                   //DataTextField = DateTimeFormatInfo.CurrentInfo.GetMonthName(a),
                   //DataValueField = a
               }
               );

               //If this code is not working then try the above code in the loop.
               ddlMonth.DataTextField = "MonthName";
               ddlMonth.DataValueField = "MonthNumber";

               ddlMonth.DataBind();
               ddlYear.DataSource = Enumerable.Range(DateTime.Now.Year - 99, 100).Reverse();
               ddlYear.DataBind();
               ddlday.DataSource = Enumerable.Range(1, DateTime.DaysInMonth(DateTime.Now.Year, Convert.ToInt32(ddlMonth.SelectedValue)));
               ddlday.DataBind();
           }

       }
       protected void ddlMonth_SelectedIndexChanged(object sender, EventArgs e)
       {
           ddlday.DataSource = Enumerable.Range(1, DateTime.DaysInMonth(DateTime.Now.Year, Convert.ToInt32(ddlMonth.SelectedIndex + 1))); ddlday.DataBind();
       }

private int _GetAge()
      {
          //int Age = Convert.ToInt32((DateTime.Now.Subtract().TotalDays / 365.25).ToString("#"));

          //ddlYear.SelectedValue.ToString();
          //ddlMonth.SelectedValue.ToString();
          //ddlday.SelectedValue.ToString();

          string age = (ddlYear.SelectedItem.ToString() + ddlMonth.SelectedItem.ToString() + ddlday.SelectedItem.ToString());

          age.Substring(2, age.Length - 2);
          //age = age.PadRight(13, 0);

          IDValidator dateSelect = new IDValidator(age.ToString());

          if (!dateSelect.get_IsValidDate(true))
              throw new ArgumentException("Date not Valid");
          return dateSelect.get_Age(DateTime.Now);


      }

推荐答案

DateTime today = DateTime.Today;  //  08/30/2012
DateTime birthday = DateTime.MinValue;
DateTime.TryParse(age, out birthday);//  08/30/2000
string actual_age = string.Empty;
if (birthday.DayOfYear <= today .DayOfYear)
   {
       actual_age  = (today .Year-birthday.Year).ToString();
   }
   else
   {
       actual_age  = (today .Year-birthday.Year- 1).ToString();
   }

希望对您有所帮助.

Hope it helps.

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