MonthChangedEventArgs 类
为 Calendar 控件的 VisibleMonthChanged 事件提供数据。
**命名空间:**System.Web.UI.WebControls
**程序集:**System.Web（在 system.web.dll 中）
语法
声明
Public Class MonthChangedEventArgs
用法
Dim instance As MonthChangedEventArgs
public class MonthChangedEventArgs
public ref class MonthChangedEventArgs
public class MonthChangedEventArgs
public class MonthChangedEventArgs
备注
当用户单击 Calendar 导航控件以显示下个月或上个月时，将引发 VisibleMonthChanged 事件。
有关 MonthChangedEventArgs 的实例的初始属性值列表，请参见 MonthChangedEventArgs 构造函数。
有关处理事件的更多信息，请参见 事件和委托。
示例
下面的代码示例演示如何为 VisibleMonthChanged 事件指定和编写处理程序，以在 Label 控件中显示 Calendar 控件是向前移动了一个月还是向后移动了一个月。
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Sub MonthChange(sender As Object, e As MonthChangedEventArgs)
If e.NewDate.Month > e.PreviousDate.Month Then
Message.Text = "You moved forward one month."
Else
Message.Text = "You moved backwards one month."
End If
End Sub
</script>
</head>
<body>
<form runat="server">
<h3> Calendar VisibleMonthChanged Example </h3>
Select a different month on the calendar.
<br><br>
<asp:Calendar id="Calendar1" runat="server"
OnVisibleMonthChanged="MonthChange">
<WeekendDayStyle BackColor="gray">
</WeekendDayStyle>
</asp:Calendar>
<hr>
<table border="1">
<tr bgcolor="Silver">
<th>
Month navigation direction
</th>
</tr>
<tr>
<td>
<asp:Label id="Message"
Text="Starting Month."
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void MonthChange(Object sender, MonthChangedEventArgs e)
{
if (e.NewDate.Month > e.PreviousDate.Month)
{
Message.Text = "You moved forward one month.";
}
else
{
Message.Text = "You moved backwards one month.";
}
}
</script>
</head>
<body>
<form runat="server">
<h3> Calendar VisibleMonthChanged Example </h3>
Select a different month on the calendar.
<br><br>
<asp:Calendar id="Calendar1" runat="server"
OnVisibleMonthChanged="MonthChange">
<WeekendDayStyle BackColor="gray">
</WeekendDayStyle>
</asp:Calendar>
<hr>
<table border="1">
<tr bgcolor="Silver">
<th>
Month navigation direction
</th>
</tr>
<tr>
<td>
<asp:Label id="Message"
Text="Starting month."
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Sub MonthChange(sender As Object, e As MonthChangedEventArgs)
If e.NewDate.Month > e.PreviousDate.Month Then
Message.Text = "You moved forward one month."
Else
Message.Text = "You moved backwards one month."
End If
End Sub
Sub Page_Load(sender As Object, e As EventArgs)
' Manually register the event-handling method for the
' VisibleMonthChanged event of the Calendar control.
AddHandler Calendar1.VisibleMonthChanged, AddressOf MonthChange
End Sub
</script>
</head>
<body>
<form runat="server">
<h3> Calendar VisibleMonthChanged Example </h3>
Select a different month on the calendar.
<br><br>
<asp:Calendar id="Calendar1" runat="server">
<WeekendDayStyle BackColor="gray">
</WeekendDayStyle>
</asp:Calendar>
<hr>
<table border="1">
<tr bgcolor="Silver">
<th>
Month navigation direction
</th>
</tr>
<tr>
<td>
<asp:Label id="Message"
Text="Starting Month."
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void MonthChange(Object sender, MonthChangedEventArgs e)
{
if (e.NewDate.Month > e.PreviousDate.Month)
{
Message.Text = "You moved forward one month.";
}
else
{
Message.Text = "You moved backwards one month.";
}
}
void Page_Load(Object sender, EventArgs e)
{
// Manually register the event-handling method for the
// VisibleMonthChanged event of the Calendar control.
Calendar1.VisibleMonthChanged +=
new MonthChangedEventHandler(this.MonthChange);
}
</script>
</head>
<body>
<form runat="server">
<h3> Calendar VisibleMonthChanged Example </h3>
Select a different month on the calendar.
<br><br>
<asp:Calendar id="Calendar1" runat="server">
<WeekendDayStyle BackColor="gray">
</WeekendDayStyle>
</asp:Calendar>
<hr>
<table border="1">
<tr bgcolor="Silver">
<th>
Month navigation direction
</th>
</tr>
<tr>
<td>
<asp:Label id="Message"
Text="Starting month."
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
.NET Framework 安全性
- AspNetHostingPermission 用于在宿主环境中进行操作。要求值：LinkDemand；权限值：Minimal。
- AspNetHostingPermission 用于在宿主环境中进行操作。要求值：InheritanceDemand；权限值：Minimal。
继承层次结构
System.Object
System.Web.UI.WebControls.MonthChangedEventArgs
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
请参见
参考
MonthChangedEventArgs 成员
System.Web.UI.WebControls 命名空间
Calendar 类
Calendar.VisibleMonthChanged 事件
MonthChangedEventHandler