Calender的使用
ASP.NET 学习笔记_02 Calender的使用
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
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7
8 public partial class myTest_Calender : System.Web.UI.Page
9 {
10 protected void Page_Load( object sender, EventArgs e)
11 {
12 if (! IsPostBack) {
13 my_Calendar.VisibleDate = my_Calendar.TodaysDate;
14 // 将选择的日期中的月份映射到下拉框中
15 Month_List.SelectedIndex = my_Calendar.VisibleDate.Month - 1 ;
16 }
17 // 显示到标签中
18 lblTodaysDate.Text = " Today is : " + my_Calendar.TodaysDate.ToShortDateString();
19 }
20 // 选择一个日期的时候触发函数
21 protected void Calendar_Select( object sender, EventArgs e)
22 {
23 lblCountUpdate();
24 lblSelectedUpdate();
25 txtClear();
26 }
27 // 下拉框触发函数
28 protected void Month_SelectedChange( object sender, EventArgs e)
29 {
30 my_Calendar.SelectedDates.Clear();
31 lblSelectedUpdate();
32 lblCountUpdate();
33 // 重新设置时间
34 my_Calendar.VisibleDate = new DateTime(my_Calendar.VisibleDate.Year,
35 Int32.Parse(Month_List.SelectedItem.Value), 1 );
36 txtClear();
37 }
38
39 // 重构函数01-修改日期的次数
40 private void lblCountUpdate() {
41 lblCount.Text = " the Count of Selected: " + my_Calendar.SelectedDates.Count.ToString();
42 }
43 // 重构函数02-清楚数据
44 private void txtClear() {
45 txtEnd.Text = "" ;
46 txtStart.Text = "" ;
47 }
48 // 重构函数03-修改日期
49 private void lblSelectedUpdate() {
50 if (my_Calendar.SelectedDate != DateTime.MinValue)
51 lblSelctedDate.Text = " the selected day is : " +
52 my_Calendar.SelectedDate.ToShortDateString();
53 }
54 // 按钮1：显示所选月份的所有星期五
55 protected void btnTgif_Click( object sender, EventArgs e)
56 {
57 int currnetMonth = my_Calendar.VisibleDate.Month;
58 int curretnYear = my_Calendar.VisibleDate.Year;
59 // 先清除原先日历位置
60 my_Calendar.SelectedDates.Clear();
61 // 如果日期是星期五则将其添加到日历中
62 for ( int i = 1 ; i <= System.DateTime.DaysInMonth(
63 curretnYear, currnetMonth); i++ ) {
64
65 DateTime datetime = new DateTime(curretnYear, currnetMonth, i);
66 if (datetime.DayOfWeek == DayOfWeek.Friday)
67 my_Calendar.SelectedDates.Add(datetime);
68 }
69 lblSelectedUpdate();
70 lblCountUpdate();
71 }
72 // 按钮2：
73 protected void btnRange_Click( object sender, EventArgs e)
74 {
75 int currnetMonth = my_Calendar.VisibleDate.Month;
76 int curretnYear = my_Calendar.VisibleDate.Year;
77
78 DateTime StartDate = new DateTime(curretnYear, currnetMonth,Int32.Parse(txtStart.Text));
79 DateTime EndtartDate = new DateTime(curretnYear, currnetMonth, Int32.Parse(txtEnd.Text));
80 my_Calendar.SelectedDates.Clear();
81 my_Calendar.SelectedDates.SelectRange(StartDate,EndtartDate);
82
83 lblCountUpdate();
84 lblSelectedUpdate();
85 }
86 }
Calender.aspx
1 <%@ Page Language= " C# " AutoEventWireup= " true " CodeFile= " Calender.aspx.cs " Inherits= " myTest_Calender " %> 2 3 <!DOCTYPE html PUBLIC " -//W3C//DTD XHTML 1.0 Transitional//EN " " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " > 4 5 <html xmlns= " http://www.w3.org/1999/xhtml " > 6 <head runat= " server " > 7 <title>Calender Control</title> 8 </head> 9 <body> 10 <form id= " form1 " runat= " server " > 11 <div> 12 <h1>Calender Control</h1> 13 <h2></h2> 14 <asp:Calendar ID= " my_Calendar " runat= " server " 15 OnSelectionChanged= " Calendar_Select " > 16 </asp:Calendar> 17 <br /> 18 <asp:Label ID= " lblCount " runat= " server " Text= " Label " ></asp:Label> 19 <br /> 20 <asp:Label ID= " lblTodaysDate " runat= " server " Text= " Label " ></asp:Label> 21 <br /> 22 <asp:Label ID= " lblSelctedDate " runat= " server " Text= " Label " ></asp:Label> 23 24 <table> 25 <tr> 26 <td>Select a month</td> 27 <td> 28 <asp:DropDownList ID= " Month_List " runat= " server " 29 AutoPostBack= " true " 30 OnSelectedIndexChanged= " Month_SelectedChange " > 31 <asp:ListItem text= " January " Value= " 1 " /> 32 <asp:ListItem text= " February " Value= " 2 " /> 33 <asp:ListItem text= " March " Value= " 3 " /> 34 <asp:ListItem text= " April " Value= " 4 " /> 35 <asp:ListItem text= " May " Value= " 5 " /> 36 <asp:ListItem text= " June " Value= " 6 " /> 37 <asp:ListItem text= " July " Value= " 7 " /> 38 <asp:ListItem text= " Augut " Value= " 8 " /> 39 <asp:ListItem text= " September " Value= " 9 " /> 40 <asp:ListItem text= " October " Value= " 10 " /> 41 <asp:ListItem text= " November " Value= " 11 " /> 42 <asp:ListItem text= " December " Value= " 12 " /> 43 </asp:DropDownList> 44 </td> 45 <td> 46 <asp:Button ID= " btnTgif " runat= " server " 47 Text= " TGIF " 48 OnClick= " btnTgif_Click " /> 49 </td> 50 </tr> 51 <tr> 52 <td colspan= " 2 " > </td> 53 </tr> 54 <tr> 55 <td colspan= " 2 " ><b>Day Range</b></td> 56 </tr> 57 58 <tr> 59 <td >Starting Day</td> 60 <td >Ending Day</td> 61 </tr> 62 63 <tr> 64 <td > 65 <asp:TextBox ID= " txtStart " runat= " server " 66 Width= " 25 " MaxLength= " 2 " ></asp:TextBox> 67 </td> 68 <td > 69 <asp:TextBox ID= " txtEnd " runat= " server " 70 Width= " 25 " MaxLength= " 2 " ></asp:TextBox> 71 </td> 72 <td > 73 <asp:Button ID= " btnRange " runat= " server " Text= " Apply " 74 OnClick= " btnRange_Click " style= " height: 21px " /> 75 </td> 76 </tr> 77 </table> 78 </div> 79 </form> 80 </body> 81 </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
分类: .Net
作者： Leo_wl
出处： http://www.cnblogs.com/Leo_wl/
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