View.Deactivate Gebeurtenis
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Treedt op wanneer het huidige actieve besturingselement View inactief wordt.
public:
event EventHandler ^ Deactivate;public event EventHandler Deactivate;member this.Deactivate : EventHandler Public Custom Event Deactivate As EventHandler Gebeurtenistype
Voorbeelden
In het volgende codevoorbeeld ziet u hoe u een gebeurtenis-handler opgeeft en codeert voor de Deactivate gebeurtenis van een View besturingselement. Wanneer de actieve weergave wordt gewijzigd, wordt een bericht weergegeven aan de gebruiker die het besturingselement opgeeft dat de ViewActivate gebeurtenis heeft gegenereerd en het View besturingselement dat de Deactivate gebeurtenis heeft gegenereerd.
<%@ Page Language="C#" %>
<!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>View.Activate Event Example</title>
<script runat="server">
protected void Index_Changed(object sender, EventArgs e)
{
// Set the active view to
// the view selected by the user.
String str = ViewListBox.SelectedItem.Text;
switch (str)
{
case "DefaultView":
MultiView1.SetActiveView(DefaultView);
break;
case "NewsView":
MultiView1.SetActiveView(NewsView);
break;
case "ShoppingView":
MultiView1.SetActiveView(ShoppingView);
break;
}
}
// The handler for the DefaultView's Activate event.
protected void DefaultView_Activate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the DefaultView.";
}
// The handler for the DefaultView's Deactivate event.
protected void DefaultView_Deactivate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the DefaultView.";
}
// The handler for the ShoppingView's Activate event.
protected void ShoppingView_Activate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the ShoppingView.";
}
// The handler for the ShoppingView's Deactivate event.
protected void ShoppingView_Deactivate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the ShoppingView.";
}
// The handler for the NewsView's Activate event.
protected void NewsView_Activate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the NewsView.";
}
// The handler for the NewsView's Deactivate event.
protected void NewsView_Deactivate(object sender, EventArgs e)
{
// Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the NewsView.";
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
MultiView1.SetActiveView(DefaultView);
}
}
</script>
</head>
<body>
<form id="Form1" runat="server">
<h3>
View Activate and Deactivate Events Example</h3>
<h4>
Select a view to display in a MultiView control:</h4>
<asp:ListBox ID="ViewListBox" Rows="1" SelectionMode="Single" AutoPostBack="True"
OnSelectedIndexChanged="Index_Changed" runat="Server">
<asp:ListItem Value="0">DefaultView</asp:ListItem>
<asp:ListItem Value="1">NewsView</asp:ListItem>
<asp:ListItem Value="2">ShoppingView</asp:ListItem>
</asp:ListBox><br />
<br />
<hr />
<asp:MultiView ID="MultiView1" runat="Server">
<asp:View ID="DefaultView" OnActivate="DefaultView_Activate" OnDeactivate="DefaultView_Deactivate"
runat="Server">
<asp:Panel ID="DefaultPanel1" Width="250px" BackColor="#C0C0FF" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="DefaultLabel1" Font-Bold="true" Font-Size="20" Text="The Default View"
runat="Server" AssociatedControlID="DefaultView">
</asp:Label>
</asp:Panel>
</asp:View>
<asp:View ID="NewsView" OnActivate="NewsView_Activate" OnDeactivate="NewsView_Deactivate"
runat="Server">
<asp:Panel ID="NewsPanel1" Width="250px" BackColor="#C0FFC0" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="NewsLabel1" Font-Bold="true" Font-Size="20" Text="The News View" runat="Server"
AssociatedControlID="NewsView">
</asp:Label>
</asp:Panel>
</asp:View>
<asp:View ID="ShoppingView" OnActivate="ShoppingView_Activate" OnDeactivate="ShoppingView_Deactivate"
runat="Server">
<asp:Panel ID="ShoppingPanel1" Width="250px" BackColor="#FFFFC0" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="ShoppingLabel1" Font-Bold="true" Font-Size="20" Text="The Shopping View"
runat="Server" AssociatedControlID="ShoppingView">
</asp:Label>
</asp:Panel>
</asp:View>
</asp:MultiView><br />
<br />
<asp:Label ID="ActivateLabel" BackColor="#ffff66" runat="Server">
</asp:Label><br />
<asp:Label ID="DeactivateLabel" BackColor="#ffff66" runat="Server">
</asp:Label>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<!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>View.Activate Event Example</title>
<script runat="server">
Sub Index_Changed(ByVal Sender As Object, ByVal e As EventArgs)
' Set the active view to
' the view selected by the user.
Dim str As String = ViewListBox.SelectedItem.Text
Select Case (str)
Case "DefaultView"
MultiView1.SetActiveView(DefaultView)
Case "NewsView"
MultiView1.SetActiveView(NewsView)
Case "ShoppingView"
MultiView1.SetActiveView(ShoppingView)
End Select
End Sub
' The handler for the DefaultView's Activate event.
Sub DefaultView_Activate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the DefaultView."
End Sub
' The handler for the DefaultView's Deactivate event.
Sub DefaultView_Deactivate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the DefaultView."
End Sub
' The handler for the ShoppingView's Activate event.
Sub ShoppingView_Activate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the ShoppingView."
End Sub
' The handler for the ShoppingView's Deactivate event.
Sub ShoppingView_Deactivate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the ShoppingView."
End Sub
' The handler for the NewsView's Activate event.
Sub NewsView_Activate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
ActivateLabel.Text = "The Activate event was raised for the NewsView."
End Sub
' The handler for the NewsView's Deactivate event.
Sub NewsView_Deactivate(ByVal sender As Object, ByVal e As EventArgs)
' Notify the user that the event was raised.
DeactivateLabel.Text = "The Deactivate event was raised for the NewsView."
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
If Not (IsPostBack) Then
MultiView1.SetActiveView(DefaultView)
End If
End Sub
</script>
</head>
<body>
<form id="Form1" runat="server">
<h3>
View Activate and Deactivate Events Example</h3>
<h4>
Select a view to display in a MultiView control:</h4>
<asp:ListBox ID="ViewListBox" Rows="1" SelectionMode="Single" AutoPostBack="True"
OnSelectedIndexChanged="Index_Changed" runat="Server">
<asp:ListItem Value="0">DefaultView</asp:ListItem>
<asp:ListItem Value="1">NewsView</asp:ListItem>
<asp:ListItem Value="2">ShoppingView</asp:ListItem>
</asp:ListBox><br />
<br />
<hr />
<asp:MultiView ID="MultiView1" runat="Server">
<asp:View ID="DefaultView" OnActivate="DefaultView_Activate" OnDeactivate="DefaultView_Deactivate"
runat="Server">
<asp:Panel ID="DefaultPanel1" Width="250px" BackColor="#C0C0FF" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="DefaultLabel1" Font-Bold="true" Font-Size="20" Text="The Default View"
runat="Server" AssociatedControlID="DefaultView">
</asp:Label>
</asp:Panel>
</asp:View>
<asp:View ID="NewsView" OnActivate="NewsView_Activate" OnDeactivate="NewsView_Deactivate"
runat="Server">
<asp:Panel ID="NewsPanel1" Width="250px" BackColor="#C0FFC0" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="NewsLabel1" Font-Bold="true" Font-Size="20" Text="The News View" runat="Server"
AssociatedControlID="NewsView">
</asp:Label>
</asp:Panel>
</asp:View>
<asp:View ID="ShoppingView" OnActivate="ShoppingView_Activate" OnDeactivate="ShoppingView_Deactivate"
runat="Server">
<asp:Panel ID="ShoppingPanel1" Width="250px" BackColor="#FFFFC0" BorderColor="#404040"
BorderStyle="Double" runat="Server">
<asp:Label ID="ShoppingLabel1" Font-Bold="true" Font-Size="20" Text="The Shopping View"
runat="Server" AssociatedControlID="ShoppingView">
</asp:Label>
</asp:Panel>
</asp:View>
</asp:MultiView><br />
<br />
<asp:Label ID="ActivateLabel" BackColor="#ffff66" runat="Server">
</asp:Label><br />
<asp:Label ID="DeactivateLabel" BackColor="#ffff66" runat="Server">
</asp:Label>
</form>
</body>
</html>
Opmerkingen
De Deactivate gebeurtenis wordt gegenereerd wanneer het huidige actieve View besturingselement inactief wordt. Een View besturingselement wordt inactief wanneer de waarde van de ActiveViewIndex eigenschap verandert of de SetActiveView methode wordt aangeroepen om een ander View besturingselement op te geven. Als het bijvoorbeeld View1 de actieve weergave binnen een MultiView besturingselement is, wanneer de ActiveViewIndex eigenschap wordt gewijzigd om op te geven View2, wordt de Deactivate gebeurtenis gegenereerd voor View1 en wordt de Activate gebeurtenis gegenereerd voor View2.
