SelectedDatesCollection.GetEnumerator 方法

定义

返回一个实现了 IEnumerator 的对象,其中包含 DateTime 集合内的所有 SelectedDatesCollection 对象。Returns an IEnumerator-implemented object that contains all DateTime objects within the SelectedDatesCollection collection.

public:
 virtual System::Collections::IEnumerator ^ GetEnumerator();
public System.Collections.IEnumerator GetEnumerator ();
abstract member GetEnumerator : unit -> System.Collections.IEnumerator
override this.GetEnumerator : unit -> System.Collections.IEnumerator
Public Function GetEnumerator () As IEnumerator

返回

一个实现了 IEnumerator 的对象,其中包含 DateTime 内的所有 SelectedDatesCollection 对象。An IEnumerator-implemented object that contains all DateTime objects within the SelectedDatesCollection.

实现

示例

下面的代码示例演示如何使用GetEnumerator方法创建一个System.Collections.IEnumerator实现了的对象, 该对象将循环访问以显示Calendar控件中的选定日期。The following code example demonstrates how to use the GetEnumerator method to create an System.Collections.IEnumerator-implemented object that is iterated through to display the selected dates from the Calendar control.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
    <title>ASP.NET Example</title>
<script runat="server">
 
       void Select_Change(Object sender, EventArgs e) 
       {
          
          DateTime current_date;
 
          // Create IEnumerator.
          IEnumerator myEnum = Calendar1.SelectedDates.GetEnumerator();      
  
          Label1.Text = "The dates selected are: ";
 
          // Loop through the IEnumerator and display the contents.
          while (myEnum.MoveNext()) 
          {
          
             current_date = (DateTime)myEnum.Current;
             Label1.Text += " " + current_date.Day.ToString();
 
          }
          
       }
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth" 
            OnSelectionChanged="Select_Change"/>
 
       <hr />
 
       Select dates from the Calendar.<br /><br />
 
       <asp:Label id="Label1" runat="server" />
 
    </form>
 </body>
 </html>
    
<%@ Page Language="VB" AutoEventWireup="True" %>
<!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>
    <title>ASP.NET Example</title>
<script runat="server">

        Sub Select_Change(sender As Object, e As EventArgs)
            
            Dim current_date As DateTime
            
            ' Create IEnumerator.
            Dim myEnum As IEnumerator = Calendar1.SelectedDates.GetEnumerator()
            
            Label1.Text = "The dates selected are: "
            
            ' Loop through the IEnumerator and display the contents.
            While myEnum.MoveNext()
            
                current_date = CType(myEnum.Current, DateTime)
                Label1.Text &= " " & current_date.Day.ToString()
                
            End While 
        End Sub
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth" 
            OnSelectionChanged="Select_Change"/>
 
       <hr />
 
       Select dates from the Calendar.<br /><br />
 
       <asp:Label id="Label1" runat="server" />
 
    </form>
 </body>
 </html>
    

注解

使用此方法创建一个实现System.Collections.IEnumerator了的对象, 该对象可以轻松地循环访问以获取集合中SelectedDatesCollection的每个项。Use this method to create an System.Collections.IEnumerator-implemented object that can be easily iterated through to get each item in the SelectedDatesCollection collection.

IEnumerator.Current使用属性可获取集合中当前指向的项。Use the IEnumerator.Current property to get the item currently pointed to in the collection.

IEnumerator.MoveNext使用方法移动到集合中的下一项。Use the IEnumerator.MoveNext method to move to the next item in the collection.

IEnumerator.Reset使用方法可将枚举数移回初始位置。Use the IEnumerator.Reset method to move the enumerator back to the initial position.

备注

需要IEnumerator.MoveNextSystem.Collections.IEnumerator创建实现的对象之后调用该方法,或使用方法将枚举数移到集合中的IEnumerator.Reset第一项。The IEnumerator.MoveNext method needs to be called after creating an System.Collections.IEnumerator-implemented object or using the IEnumerator.Reset method to move the enumerator to the first item in the collection. 否则, 由IEnumerator.Current属性表示的项是不确定的。Otherwise, the item represented by the IEnumerator.Current property is undefined.

适用于

另请参阅