View.Deactivate Událost
Definice
Důležité
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Nastane, když se aktuální aktivní View ovládací prvek stane neaktivním.
public:
event EventHandler ^ Deactivate;public event EventHandler Deactivate;member this.Deactivate : EventHandler Public Custom Event Deactivate As EventHandler Event Type
Příklady
Následující příklad kódu ukazuje, jak určit a kód obslužné rutiny události pro Deactivate událost View ovládacího prvku. Když se aktivní zobrazení změní, zobrazí se uživateli zpráva s určením View ovládacího prvku, který událost vyvolal Activate , a View ovládacího prvku, který událost vyvolal Deactivate .
<%@ 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>
Poznámky
Událost Deactivate je vyvolána, když se aktuální aktivní View ovládací prvek stane neaktivním. Ovládací View prvek se stane neaktivní, když se změní hodnota ActiveViewIndex vlastnosti nebo SetActiveView je volána metoda pro určení jiného View ovládacího prvku. Pokud je například View1 aktivní zobrazení v rámci MultiView ovládacího prvku, když ActiveViewIndex se vlastnost změní na zadat View2, Deactivate událost se vyvolá pro View1 a Activate událost je vyvolána pro View2.
Platí pro
Viz také
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