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)

                            ASP.NET 学习笔记_02 Calender的使用

 

(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

                    ASP.NET 学习笔记_02 Calender的使用

 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">&nbsp;</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

 

 

 

 

 

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