1、介绍
(1、在Calender中,所有可选择的符号会显示下划线,这是因为它们在浏览器都会呈现为链接。
如果让用户可以选择某天、月、周,必须设置SelectionMode属性(Day、 DayWeek、DayWeekMonth)
(2 控件事件 当用户选择了某一天或者月,可以用OnSelectionChanged来触发
通过 Calendar1.SelectedDate.ToShortDateString();来获取所选择的时间点
通过 Calendar1.SelectedDate.Count.ToString();来获取所选择的天数
2、实例
现在通过一个实例来加深对日历控件的理解:
当点击TGIF时,会在日历上显示所选月份的所有星期五
当点击Apply时,会在日历上显示开始到结束的日期
Calender.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class myTest_Calender : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) {
my_Calendar.VisibleDate = my_Calendar.TodaysDate;
//将选择的日期中的月份映射到下拉框中
Month_List.SelectedIndex = my_Calendar.VisibleDate.Month - 1;
}
//显示到标签中
lblTodaysDate.Text = \"Today is :\" + my_Calendar.TodaysDate.ToShortDateString();
}
//选择一个日期的时候触发函数
protected void Calendar_Select(object sender, EventArgs e)
{
lblCountUpdate();
lblSelectedUpdate();
txtClear();
}
//下拉框触发函数
protected void Month_SelectedChange(object sender, EventArgs e)
{
my_Calendar.SelectedDates.Clear();
lblSelectedUpdate();
lblCountUpdate();
//重新设置时间
my_Calendar.VisibleDate = new DateTime(my_Calendar.VisibleDate.Year,
Int32.Parse(Month_List.SelectedItem.Value), 1);
txtClear();
}
//重构函数01-修改日期的次数
private void lblCountUpdate() {
lblCount.Text = \"the Count of Selected:\" + my_Calendar.SelectedDates.Count.ToString();
}
//重构函数02-清楚数据
private void txtClear() {
txtEnd.Text = \"\";
txtStart.Text = \"\";
}
//重构函数03-修改日期
private void lblSelectedUpdate() {
if (my_Calendar.SelectedDate != DateTime.MinValue)
lblSelctedDate.Text = \"the selected day is :\" +
my_Calendar.SelectedDate.ToShortDateString();
}
//按钮1:显示所选月份的所有星期五
protected void btnTgif_Click(object sender, EventArgs e)
{
int currnetMonth = my_Calendar.VisibleDate.Month;
int curretnYear = my_Calendar.VisibleDate.Year;
//先清除原先日历位置
my_Calendar.SelectedDates.Clear();
//如果日期是星期五则将其添加到日历中
for (int i = 1; i <= System.DateTime.DaysInMonth(
curretnYear, currnetMonth); i++) {
DateTime datetime = new DateTime(curretnYear, currnetMonth, i);
if (datetime.DayOfWeek == DayOfWeek.Friday)
my_Calendar.SelectedDates.Add(datetime);
}
lblSelectedUpdate();
lblCountUpdate();
}
//按钮2:
protected void btnRange_Click(object sender, EventArgs e)
{
int currnetMonth = my_Calendar.VisibleDate.Month;
int curretnYear = my_Calendar.VisibleDate.Year;
DateTime StartDate = new DateTime(curretnYear, currnetMonth,Int32.Parse(txtStart.Text));
DateTime EndtartDate = new DateTime(curretnYear, currnetMonth, Int32.Parse(txtEnd.Text));
my_Calendar.SelectedDates.Clear();
my_Calendar.SelectedDates.SelectRange(StartDate,EndtartDate);
lblCountUpdate();
lblSelectedUpdate();
}
}
Calender.aspx
<%@ Page Language=\"C#\" AutoEventWireup=\"true\" CodeFile=\"Calender.aspx.cs\" Inherits=\"myTest_Calender\" %>
<!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>Calender Control</title>
</head>
<body>
<form id=\"form1\" runat=\"server\">
<div>
<h1>Calender Control</h1>
<h2></h2>
<asp:Calendar ID=\"my_Calendar\" runat=\"server\"
OnSelectionChanged=\"Calendar_Select\">
</asp:Calendar>
<br />
<asp:Label ID=\"lblCount\" runat=\"server\" Text=\"Label\"></asp:Label>
<br />
<asp:Label ID=\"lblTodaysDate\" runat=\"server\" Text=\"Label\"></asp:Label>
<br />
<asp:Label ID=\"lblSelctedDate\" runat=\"server\" Text=\"Label\"></asp:Label>
<table>
<tr>
<td>Select a month</td>
<td>
<asp:DropDownList ID=\"Month_List\" runat=\"server\"
AutoPostBack=\"true\"
OnSelectedIndexChanged=\"Month_SelectedChange\">
<asp:ListItem text=\"January\" Value=\"1\" />
<asp:ListItem text=\"February\" Value=\"2\" />
<asp:ListItem text=\"March\" Value=\"3\" />
<asp:ListItem text=\"April\" Value=\"4\" />
<asp:ListItem text=\"May\" Value=\"5\" />
<asp:ListItem text=\"June\" Value=\"6\" />
<asp:ListItem text=\"July\" Value=\"7\" />
<asp:ListItem text=\"Augut\" Value=\"8\" />
<asp:ListItem text=\"September\" Value=\"9\" />
<asp:ListItem text=\"October\" Value=\"10\" />
<asp:ListItem text=\"November\" Value=\"11\" />
<asp:ListItem text=\"December\" Value=\"12\" />
</asp:DropDownList>
</td>
<td>
<asp:Button ID=\"btnTgif\" runat=\"server\"
Text=\"TGIF\"
OnClick=\"btnTgif_Click\"/>
</td>
</tr>
<tr>
<td colspan=\"2\"> </td>
</tr>
<tr>
<td colspan=\"2\"><b>Day Range</b></td>
</tr>
<tr>
<td >Starting Day</td>
<td >Ending Day</td>
</tr>
<tr>
<td >
<asp:TextBox ID=\"txtStart\" runat=\"server\"
Width=\"25\" MaxLength=\"2\"></asp:TextBox>
</td>
<td >
<asp:TextBox ID=\"txtEnd\" runat=\"server\"
Width=\"25\" MaxLength=\"2\"></asp:TextBox>
</td>
<td >
<asp:Button ID=\"btnRange\" runat=\"server\" Text=\"Apply\"
OnClick=\"btnRange_Click\" style=\"height: 21px\"/>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
总结:
(1 采用一些重构,将一些函数方法分离出去,这一块有一些还没分离完全
(2 日期控件还有VisiblMonthChanged事件来处理日历是否被用户更改了月份, e.NewDate.Year 和e.PreviousDate.Year诸如此类的比较
(3 DayRender事件,可以通过cell和Day来呈现日期的特殊性,例如周末和节假日的颜色,
e.Day.IsOtherMOnth e.Day.IsWeekend 等