SelectedDatesCollection.Contains Method
Returns a value indicating whether the SelectedDatesCollection contains the specified System.DateTime.
[Visual Basic] Public Function Contains( _ ByVal date As DateTime _ ) As Boolean [C#] public bool Contains( DateTime date ); [C++] public: bool Contains( DateTime date ); [JScript] public function Contains( date : DateTime ) : Boolean;
Parameters
- date
- The System.DateTime to search for in the SelectedDatesCollection.
Return Value
true if the SelectedDatesCollection contains the specified System.DateTime; otherwise, false.
Remarks
Use this method to determine whether the SelectedDatesCollection contains the specified System.DateTime.
Example
[Visual Basic, C#] The following example demonstrates how to use the Contains method to determine whether the SelectedDatesCollection contains the specified System.DateTime.
[Visual Basic] <%@ Page Language="VB" AutoEventWireup="True" %> <html> <head> <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 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> [C#] <%@ Page Language="C#" AutoEventWireup="True" %> <html> <head> <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 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>
[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family
See Also
SelectedDatesCollection Class | SelectedDatesCollection Members | System.Web.UI.WebControls Namespace | System.DateTime | SelectedDates | Calendar