MultiView.OnActiveViewChanged(EventArgs) Methode

  • Referenz

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Löst das ActiveViewChanged-Ereignis eines MultiView-Steuerelements aus.

protected:
 virtual void OnActiveViewChanged(EventArgs ^ e);
protected virtual void OnActiveViewChanged (EventArgs e);
abstract member OnActiveViewChanged : EventArgs -> unit
override this.OnActiveViewChanged : EventArgs -> unit
Protected Overridable Sub OnActiveViewChanged (e As EventArgs)

Parameter

e
EventArgs

Ein EventArgs, das die Ereignisdaten enthält.

Beispiele

Im folgenden Beispiel wird veranschaulicht, wie sie einen Ereignishandler für das ActiveViewChanged Ereignis eines MultiView Steuerelements angeben und codieren. Wenn sich die aktive Ansicht ändert, wird eine Meldung in einem Label -Steuerelement auf der Seite angezeigt.

Hinweis

Im folgenden Codebeispiel wird das Einzeldateicodemodell verwendet. Es funktioniert möglicherweise nicht ordnungsgemäß, wenn es direkt in eine CodeBehind-Datei kopiert wird. Dieses Codebeispiel muss in eine leere Textdatei mit einer .aspx-Erweiterung kopiert werden. Weitere Informationen zum Web Forms-Codemodell finden Sie unter ASP.NET Web Forms-Seitencodemodell.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    protected void MultiView1_ActiveViewChanged(object sender, EventArgs e)
    {
        String activeView;
        activeView = MultiView1.GetActiveView().ID;
        ActiveViewLabel.Text = "The ActiveViewChanged event was raised." +
                               "<br/>" + "The active view is set to " + activeView;
    }

    protected void LinkButton_Command(object sender, CommandEventArgs e)
    {
        // Determine which link button was clicked
        // and set the active view to
        // the view selected by the user.
        switch (e.CommandArgument.ToString())
        {
            case "DefaultView":
                MultiView1.SetActiveView(DefaultView);
                break;
            case "News":
                MultiView1.SetActiveView(NewsView);
                break;
            case "Shopping":
                MultiView1.SetActiveView(ShoppingView);
                break;
        }
        
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>MultiView.ActiveViewChangedEvent Example</h3>

         <asp:MultiView id="MultiView1"
            ActiveViewIndex="0"
            OnActiveViewChanged="MultiView1_ActiveViewChanged"
            runat="Server">

            <asp:View id="DefaultView" 
                runat="Server">                

                <asp:Panel id="DefaultViewPanel" 
                    Width="330px" 
                    BackColor="#C0C0FF" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">  

                    <asp:Label id="DefaultLabel1" 
                        Font-bold="true"
                        Font-size="14" 
                        Text="The Default View"
                        runat="Server"
                        AssociatedControlID="DefaultView">
                    </asp:Label>                  

                    <asp:BulletedList id="DefaultBulletedList1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Weather</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Stock Quotes</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's News Headlines</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Featured Shopping</asp:ListItem>
                    </asp:BulletedList>

                    <hr />

                    <asp:Label id="DefaultLabel2"                      
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />
                
                    <asp:LinkButton id="Default_NewsLink" 
                        Text="Go to News View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="News" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="Default_ShoppingLink"
                        Text="Go to Shopping View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="Shopping" 
                        CommandName="Link"
                        Width="150px"
                        runat="server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

            <asp:View id="NewsView" 
                runat="Server">

                <asp:Panel id="NewsPanel1" 
                    Width="330px" 
                    BackColor="#C0FFC0" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">

                    <asp:Label id="NewsLabel1" 
                        Font-bold="true"
                        Font-size="14"
                        Text="The News View"
                        runat="Server"
                        AssociatedControlID="NewsView">                    
                    </asp:Label>

                    <asp:BulletedList id="NewsBulletedlist1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem Value="http://www.microsoft.com">Today's International Headlines</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Today's National Headlines</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Today's Local News</asp:ListItem>
                    </asp:BulletedList>
                    
                    <hr />

                    <asp:Label id="NewsLabel2"                      
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />

                    <asp:LinkButton id="News_DefaultLink" 
                        Text="Go to the Default View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="DefaultView" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="News_ShoppingLink" 
                        Text="Go to Shopping View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="Shopping" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

            <asp:View id="ShoppingView" 
                runat="Server">

                <asp:Panel id="ShoppingPanel1" 
                    Width="330px" 
                    BackColor="#FFFFC0" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">

                    <asp:Label id="ShoppingLabel1" 
                        Font-Bold="true"
                        Font-size="14"                         
                        Text="The Shopping View"
                        runat="Server"
                        AssociatedControlID="ShoppingView">
                    </asp:Label>

                    <asp:BulletedList id="ShoppingBulletedlist1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Home and Garden </asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Women's Fashions</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Men's Fashions</asp:ListItem>
                    </asp:BulletedList>
                    
                    <hr />

                    <asp:Label id="ShoppingLabel2" 
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />

                    <asp:LinkButton id="Shopping_DefaultLink" 
                        Text="Go to the Default View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="DefaultView" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="Shopping_NewsLink"
                        Text="Go to News View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="News" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

        </asp:MultiView>
        
        <hr />
        
        <asp:Label id="ActiveViewLabel"             
            BorderStyle="None"
            Font-Size="Small"
            BackColor="#ffff66"
            runat="Server" > 
        </asp:Label>
    
    </div>
    </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">

<script runat="server">
    
    Sub MultiView1_ActiveViewChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim activeView As String
        activeView = MultiView1.GetActiveView().ID
        ActiveViewLabel.Text = "The ActiveViewChanged event was raised." + _
                               "<br/>" + "The active view is set to " + activeView
                                   
    End Sub

    Sub LinkButton_Command(ByVal sender As Object, ByVal e As CommandEventArgs)
        ' Determine which link button was clicked
        ' and set the active view to
        ' the view selected by the user.
        Select Case (e.CommandArgument.ToString())
            Case "DefaultView"
                MultiView1.SetActiveView(DefaultView)
            Case "News"
                MultiView1.SetActiveView(NewsView)
            Case "Shopping"
                MultiView1.SetActiveView(ShoppingView)
        End Select

    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>MultiView.ActiveViewChangedEvent Example</h3>

         <asp:MultiView id="MultiView1"
            ActiveViewIndex="0"
            OnActiveViewChanged="MultiView1_ActiveViewChanged"
            runat="Server">

            <asp:View id="DefaultView" 
                runat="Server">                

                <asp:Panel id="DefaultViewPanel" 
                    Width="330px" 
                    BackColor="#C0C0FF" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">  

                    <asp:Label id="DefaultLabel1" 
                        Font-bold="true"
                        Font-size="14" 
                        Text="The Default View"
                        runat="Server"
                        AssociatedControlID="DefaultView">
                    </asp:Label>                  

                    <asp:BulletedList id="DefaultBulletedList1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Weather</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Stock Quotes</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's News Headlines</asp:ListItem>
                            <asp:ListItem 
                                Value="http://www.microsoft.com">Today's Featured Shopping</asp:ListItem>
                    </asp:BulletedList>

                    <hr />

                    <asp:Label id="DefaultLabel2"                      
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />
                
                    <asp:LinkButton id="Default_NewsLink" 
                        Text="Go to News View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="News" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="Default_ShoppingLink"
                        Text="Go to Shopping View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="Shopping" 
                        CommandName="Link"
                        Width="150px"
                        runat="server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

            <asp:View id="NewsView" 
                runat="Server">

                <asp:Panel id="NewsPanel1" 
                    Width="330px" 
                    BackColor="#C0FFC0" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">

                    <asp:Label id="NewsLabel1" 
                        Font-bold="true"
                        Font-size="14"
                        Text="The News View"
                        runat="Server"
                        AssociatedControlID="NewsView">                    
                    </asp:Label>

                    <asp:BulletedList id="NewsBulletedlist1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem Value="http://www.microsoft.com">Today's International Headlines</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Today's National Headlines</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Today's Local News</asp:ListItem>
                    </asp:BulletedList>
                    
                    <hr />

                    <asp:Label id="NewsLabel2"                      
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />

                    <asp:LinkButton id="News_DefaultLink" 
                        Text="Go to the Default View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="DefaultView" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="News_ShoppingLink" 
                        Text="Go to Shopping View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="Shopping" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

            <asp:View id="ShoppingView" 
                runat="Server">

                <asp:Panel id="ShoppingPanel1" 
                    Width="330px" 
                    BackColor="#FFFFC0" 
                    BorderColor="#404040"
                    BorderStyle="Double"
                    runat="Server">

                    <asp:Label id="ShoppingLabel1" 
                        Font-Bold="true"
                        Font-size="14"                         
                        Text="The Shopping View"
                        runat="Server"
                        AssociatedControlID="ShoppingView">
                    </asp:Label>

                    <asp:BulletedList id="ShoppingBulletedlist1" 
                        BulletStyle="Disc" 
                        DisplayMode="Hyperlink"
                        Target="_blank"
                        runat="Server">
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Home and Garden </asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Women's Fashions</asp:ListItem>
                            <asp:ListItem Value="http://www.microsoft.com">Shop for Men's Fashions</asp:ListItem>
                    </asp:BulletedList>
                    
                    <hr />

                    <asp:Label id="ShoppingLabel2" 
                        Font-size="12" 
                        Text="Click a link to display a different view:"
                        runat="Server">
                    </asp:Label><br />

                    <asp:LinkButton id="Shopping_DefaultLink" 
                        Text="Go to the Default View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="DefaultView" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton>

                    <asp:LinkButton id="Shopping_NewsLink"
                        Text="Go to News View" 
                        OnCommand="LinkButton_Command"
                        CommandArgument="News" 
                        CommandName="Link"
                        Width="150px"
                        runat="Server">
                    </asp:LinkButton><br /><br />

                </asp:Panel>

            </asp:View>

        </asp:MultiView>
        
        <hr />
        
        <asp:Label id="ActiveViewLabel"             
            BorderStyle="None"
            Font-Size="Small"
            BackColor="#ffff66"
            runat="Server" > 
        </asp:Label>
    </div>
    </form>
</body>
</html>

Hinweise

Das ActiveViewChanged Ereignis wird ausgelöst, wenn das aktive View Steuerelement innerhalb eines MultiView Steuerelements zwischen Beiträgen zum Server wechselt, und Sie können einen benutzerdefinierten Handler für dieses Ereignis bereitstellen.

Durch das Auslösen eines Ereignisses wird der Ereignishandler über einen Delegaten aufgerufen. Weitere Informationen finden Sie unter Vorgehensweise: Nutzen von Ereignissen in einer Web Forms-Anwendung.

Mit der OnActiveViewChanged-Methode können auch abgeleitete Klassen das Ereignis ohne Anfügen eines Delegaten behandeln. Dies ist das bevorzugte Verfahren für die Behandlung des Ereignisses in einer abgeleiteten Klasse.

Hinweise für Vererber

Wenn Sie OnActiveViewChanged(EventArgs) in einer abgeleiteten Klasse überschreiben, müssen Sie die OnActiveViewChanged(EventArgs)-Methode der Basisklasse aufrufen, damit registrierte Delegaten das Ereignis empfangen.

Gilt für:

Weitere Informationen