MultiView.OnActiveViewChanged(EventArgs) Yöntem

  • Başvuru

Tanım

Ad Alanı:
System.Web.UI.WebControls
Bütünleştirilmiş Kod:
System.Web.dll

Bir MultiView denetimin ActiveViewChanged olayını tetikler.

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)

Parametreler

e
EventArgs

EventArgs Olay verilerini içeren bir.

Örnekler

Aşağıdaki örnek, bir denetimin olayı için bir olay işleyicisinin nasıl belirtileceğini ve kodleneceğini ActiveViewChangedMultiView gösterir. Etkin görünüm değiştiğinde, sayfadaki denetimde bir Label ileti görüntülenir.

Not

Aşağıdaki kod örneği tek dosyalı kod modelini kullanır ve doğrudan arka planda kod dosyasına kopyalandığında düzgün çalışmayabilir. Bu kod örneği, .aspx uzantısına sahip boş bir metin dosyasına kopyalanmalıdır. Web Forms kod modeli hakkında daha fazla bilgi için bkz. ASP.NET Web Forms Sayfa Kodu Modeli.

<%@ 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>

Açıklamalar

OlayActiveViewChanged, bir MultiView denetim içindeki etkin View denetim, sunucuya yapılan gönderiler arasında değiştiğinde oluşturulur ve bu olay için özel bir işleyici sağlayabilirsiniz.

Olay bildirmek, bir temsilci yoluyla olay işleyicisini çağırır. Daha fazla bilgi için bkz . Nasıl yapılır: Web Forms Uygulamasında Olayları Kullanma.

yöntemi, OnActiveViewChanged türetilmiş sınıfların bir temsilci eklemeden olayı işlemesine de izin verir. Bu, türetilmiş bir sınıftaki olayı işlemek için tercih edilen tekniktir.

Devralanlara Notlar

Türetilmiş bir sınıfta geçersiz kılma OnActiveViewChanged(EventArgs) sırasında, kayıtlı temsilcilerin olayı alması için temel sınıfın OnActiveViewChanged(EventArgs) yöntemini çağırdığınızdan emin olun.

Şunlara uygulanır

Ayrıca bkz.