SelectedDatesCollection.Contains(DateTime) 方法

  • 參考

定義

命名空間:
System.Web.UI.WebControls
組件:
System.Web.dll

傳回數值，表示 SelectedDatesCollection 集合是否包含指定的 DateTime 物件。

public:
 bool Contains(DateTime date);
public bool Contains (DateTime date);
member this.Contains : DateTime -> bool
Public Function Contains (date As DateTime) As Boolean

參數

date
DateTime

要在 DateTime 中搜尋的 SelectedDatesCollection。

傳回

Boolean

如果 SelectedDatesCollection 包含指定的 DateTime，則為 true，否則為 false。

範例

下列程式碼範例示範如何使用 Contains 方法來判斷集合是否 SelectedDatesCollection 包含指定的 System.DateTime 物件。

<%@ 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) 
       {
   
          int current_month = Calendar1.VisibleDate.Month;
          int current_year = Calendar1.VisibleDate.Year;
           
          Calendar1.VisibleDate = Calendar1.TodaysDate;
 
          DateTime date = new DateTime(current_year, current_month, 15);
 
          if (Calendar1.SelectedDates.Contains(date)) 
             Label1.Text = "Yes, you selected the 15th!!";
          else
             Label1.Text = "No, you didn't select the 15th!!";
             
       }
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth"/>
 
       <hr />
 
       Select dates on the Calendar and click the button below <br />
       to validate that the 15th on the month was selected <br /><br /> 
 
       <asp:Button id="Button1"
            text="Validate the 15th" 
            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)
            
            Dim current_month As Integer = Calendar1.VisibleDate.Month
            Dim current_year As Integer = Calendar1.VisibleDate.Year
            
            Calendar1.VisibleDate = Calendar1.TodaysDate
            
            Dim theDate As New DateTime(current_year, current_month, 15)
            
            If Calendar1.SelectedDates.Contains(theDate) Then
                Label1.Text = "Yes, you selected the 15th!!"
            Else
                Label1.Text = "No, you didn't select the 15th!!"
            End If 
        End Sub
 
    </script>
 
 </head>     
 <body>
 
    <form id="form1" runat="server">
 
       <asp:Calendar ID="Calendar1" runat="server"  
            SelectionMode="DayWeekMonth"/>
 
       <hr />
 
       Select dates on the Calendar and click the button below <br />
       to validate that the 15th on the month was selected <br /><br /> 
 
       <asp:Button id="Button1"
            text="Validate the 15th" 
            OnClick="Button_Click"  
            runat="server"  /> <br /><br />
 
       <asp:Label id="Label1" runat="server" />
 
    </form>
 </body>
 </html>

備註

使用這個方法來判斷集合是否 SelectedDatesCollection 包含指定的 System.DateTime 物件。

適用於

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