下面是一些測試代碼的東西
aspx頁面代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Temp._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">Year
<asp:DropDownList ID="_year" runat="server" onselectedindexchanged="_year_SelectedIndexChanged" AutoPostBack="true">
</asp:DropDownList>Month
<asp:DropDownList ID="_month" runat="server" onselectedindexchanged="_month_SelectedIndexChanged" AutoPostBack="true">
</asp:DropDownList>Day
<asp:DropDownList ID="_day" runat="server" onselectedindexchanged="_day_SelectedIndexChanged" AutoPostBack="true">
</asp:DropDownList>
</form>
</body>
</html>
和ASPX。 cs的文件代碼是
namespace Temp
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
_year.DataSource = GetData.getYear();
_year.DataTextField = "Year";
_year.DataBind();
_month.Items.Add(new ListItem("Select"));
_month.DataBind();
_day.Items.Add(new ListItem("Select"));
_day.DataBind();
}
}
protected void _year_SelectedIndexChanged(object sender, EventArgs e)
{
_month.Items.Clear();
_month.DataSource = GetData.getMonth();
_month.DataTextField = "MonthName";
_month.DataValueField = "MonthId";
_month.DataBind();
}
protected void _month_SelectedIndexChanged(object sender, EventArgs e)
{
_day.Items.Clear();
_day.DataSource = GetData.getDays(_month.SelectedIndex+1,GetData.isLeapYear(Convert.ToInt32(_year.SelectedValue)));
_day.DataTextField = "Day";
_day.DataBind();
}
protected void _day_SelectedIndexChanged(object sender, EventArgs e)
{
//Use selected value of _month _year and _day here
}
}
public class GetData
{
public static List<day> getDays(int monthId,bool isLeapYear)
{
int maxLimit;
if (monthId == 2)
{
if (isLeapYear) maxLimit = 29;
else maxLimit = 28;
}
else if (monthId == 1 || monthId == 3 || monthId == 5 || monthId == 7 || monthId == 8 || monthId == 10 || monthId == 12)
maxLimit = 31;
else maxLimit = 30;
List<day> days = new List<day>();
for (int i = 1; i <= maxLimit; i++)
{
days.Add(new day { Day = i });
}
return days;
}
public static List<year> getYear()
{
//Set here min and max range of year
int minLimit = 1950;
int maxLimit = DateTime.Now.Year;
List<year> years = new List<year>();
for (int i = minLimit; i <= maxLimit; i++)
{
//You can modify code for bind year dropdown
//respectively change in date or month
/*if (isLeapYear)
{
if(i%4==0)
years.Add(new year { Year = i });
}
else*/
years.Add(new year { Year = i });
}
return years;
}
public static List<month> getMonth()
{
List<month> months=new List<month>();
months.Add(new month { MonthId = 1, MonthName = "Jan" });
months.Add(new month { MonthId = 2, MonthName = "Frb" }); months.Add(new month { MonthId = 3, MonthName = "Mar" });
months.Add(new month { MonthId = 4, MonthName = "Apr" }); months.Add(new month { MonthId = 5, MonthName = "May" });
months.Add(new month { MonthId = 6, MonthName = "Jun" }); months.Add(new month { MonthId = 7, MonthName = "July" });
months.Add(new month { MonthId = 8, MonthName = "Aug" });
months.Add(new month { MonthId = 9, MonthName = "Sep" }); months.Add(new month { MonthId = 10, MonthName = "Oct" });
months.Add(new month { MonthId = 11, MonthName = "Nov" });months.Add(new month { MonthId = 12, MonthName = "Dec" });
return months;
}
internal static bool isLeapYear(int p)
{
if (p % 4 == 0)
return true;
else return false;
}
}
public class month
{
public string MonthName { get; set; }
public int MonthId { get; set; }
}
public class day
{
public int Day { get; set; }
}
public class year
{
public int Year { get; set; }
}
}
來源
2013-10-10 22:30:40
Sam
你如何將下拉菜單連接到事件處理程序？ –
您能否澄清一下這是什麼意思「這是我所做的，但它沒有效果」？還請注意，您在if（ddlmonth.SelectedIndex.Equals（6））中加入前兩個表達式 – Alezis
我在月DDL的SelectedIndexChanged事件中編寫了第一段代碼，以便當我更改月份DDL的索引時，日期DDL中的項目相應地發生變化，即相應月份爲30天或31天等，第二段代碼寫入Page_Load事件中。感謝您指出雙重表達。 – Hassan