SelectedDatesCollection.Count 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取 SelectedDatesCollection 集合中 DateTime 对象的数目。

public:
 property int Count { int get(); };
public int Count { get; }
member this.Count : int
Public ReadOnly Property Count As Integer

属性值

Int32

DateTime 中 SelectedDatesCollection 对象的数目。

实现

Count

示例

下面的代码示例演示如何使用 属性 Count 来确定集合中的 SelectedDatesCollection 日期数。 请注意， SelectedDates 控件的 Calendar 属性是 类的 SelectedDatesCollection 实例。

<%@ 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 language="C#" runat="server">
 
       void Button_Click(Object sender, EventArgs e) 
       {
 
          if (Calendar1.SelectedDates.Count > 0)
          {
 
             Label1.Text = "Selected date(s) are: ";
 
             for (int i = 0; i < Calendar1.SelectedDates.Count; i++)
             {
                Label1.Text += " " + Calendar1.SelectedDates[i].Day.ToString();
             } 
 
          }
          else
             Label1.Text = "No dates selected!!";
       }
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth"/>
 
       <hr />
 
       <asp:Button id="Button1"
            text="Display Selected Dates" 
            OnClick="Button_Click"  
            runat="server"  /> <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 language="VB" runat="server">
 
        Sub Button_Click(sender As Object, e As EventArgs)
            
            If Calendar1.SelectedDates.Count > 0 Then
                
                Label1.Text = "Selected date(s) are: "
                
                Dim i As Integer
                For i = 0 To Calendar1.SelectedDates.Count - 1
                    Label1.Text &= " " &+ Calendar1.SelectedDates(i).Day.ToString()
                Next i
                
            Else
            
                Label1.Text = "No dates selected!!"
                
            End If
        End Sub
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth"/>
 
       <hr />
 
       <asp:Button id="Button1"
            text="Display Selected Dates" 
            OnClick="Button_Click"  
            runat="server"  /> <br /><br />
 
       <asp:Label id="Label1" runat="server" />
 
    </form>
 </body>
 </html>

注解

使用此属性可确定集合中的 SelectedDatesCollection 日期数。 在 Count 循环访问集合以确定上限时，通常会使用 属性。

适用于

另请参阅