AdRotator.OnAdCreated(AdCreatedEventArgs) Metodo
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
protected:
virtual void OnAdCreated(System::Web::UI::WebControls::AdCreatedEventArgs ^ e);
protected virtual void OnAdCreated (System.Web.UI.WebControls.AdCreatedEventArgs e);
abstract member OnAdCreated : System.Web.UI.WebControls.AdCreatedEventArgs -> unit
override this.OnAdCreated : System.Web.UI.WebControls.AdCreatedEventArgs -> unit
Protected Overridable Sub OnAdCreated (e As AdCreatedEventArgs)
Parametri
Oggetto AdCreatedEventArgs che contiene i dati dell'evento.
Esempio
Nell'esempio di codice seguente viene illustrato come specificare e codificare un gestore per l'evento AdCreated . Ottiene l'URL associato all'annuncio quando viene creato il AdRotator controllo e lo visualizza sotto il controllo.
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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 runat="server">
<title>AdRotator Example</title>
</head>
<script language="c#" runat="server">
void AdCreated_Event(Object sender, AdCreatedEventArgs e)
{
Message.Text=e.NavigateUrl;
}
</script>
<body>
<form id="form1" runat="server">
<h3>AdRotator Example</h3>
<asp:AdRotator id="test1" runat="server"
AdvertisementFile = "~/App_Data/Ads.xml"
Borderwidth="1"
Target="_blank"
OnAdCreated="AdCreated_Event"/><br /><br />
<asp:label id="Message" runat="server"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!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 runat="server">
<title>AdRotator Example</title>
</head>
<script language="vb" runat="server">
Sub AdCreated_Event(sender As Object, e As AdCreatedEventArgs)
Message.Text=e.NavigateUrl
End Sub
</script>
<body>
<form id="form1" runat="server">
<h3>AdRotator Example</h3>
<asp:AdRotator id="test1" runat="server"
AdvertisementFile = "~/App_Data/Ads.xml"
Borderwidth="1"
Target="_blank"
OnAdCreated="AdCreated_Event"/><br /><br />
<asp:label id="Message" runat="server"/>
</form>
</body>
</html>
Nell'esempio di codice seguente viene illustrato come formattare il file XML contenente le informazioni sull'annuncio pubblicitario. Per altre informazioni sul file XML, vedere la AdvertisementFile proprietà .
<Advertisements>
<Ad>
<ImageUrl>~/Images/image1.jpg</ImageUrl>
<Height>60</Height>
<Width>190</Width>
<NavigateUrl>http://www.microsoft.com</NavigateUrl>
<AlternateText>Microsoft Main Site</AlternateText>
<Impressions>80</Impressions>
<Keyword>Topic1</Keyword>
<Caption>This is the caption for Ad#1</Caption>
</Ad>
<Ad>
<ImageUrl>~/Images/image2.jpg</ImageUrl>
<Height>90</Height>
<Width>90</Width>
<NavigateUrl>http://www.wingtiptoys.com</NavigateUrl>
<AlternateText>Wingtip Toys</AlternateText>
<Impressions>80</Impressions>
<Keyword>Topic2</Keyword>
<Caption>This is the caption for Ad#2</Caption>
</Ad>
</Advertisements>
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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 runat="server">
<title>AdRotator AdCreated Example</title>
</head>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Create an EventHandler delegate for the method you want to handle the event
// and then add it to the list of methods called when the event is raised.
Ad.AdCreated += new System.Web.UI.WebControls.AdCreatedEventHandler(this.AdCreated_Event);
}
void AdCreated_Event(Object sender, AdCreatedEventArgs e)
{
// Override the AlternateText value from the ads.xml file.
e.AlternateText = "Visit this site!";
}
</script>
<body>
<form id="form1" runat="server">
<h3>AdRotator AdCreated Example</h3>
Notice that the AlternateText property of the advertisement <br />
has been programmatically modified from the value in the XML <br />
file.
<br /><br />
<asp:AdRotator id="Ad" runat="server"
AdvertisementFile = "~/App_Data/Ads.xml"
Borderwidth="1"
Target="_blank"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!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 runat="server">
<title>AdRotator AdCreated Example</title>
</head>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
' Create an EventHandler delegate for the method you want to handle the event
' and then add it to the list of methods called when the event is raised.
AddHandler Ad.AdCreated, AddressOf AdCreated_Event
End Sub
Sub AdCreated_Event(sender As Object, e As AdCreatedEventArgs)
' Override the AlternateText value from the ads.xml file.
e.AlternateText = "Visit this site!"
End Sub
</script>
<body>
<form id="form1" runat="server">
<h3>AdRotator AdCreated Example</h3>
Notice that the AlternateText property of the advertisement <br />
has been programmatically modified from the value in the XML <br />
file.
<br /><br />
<asp:AdRotator id="Ad" runat="server"
AdvertisementFile = "~/App_Data/Ads.xml"
Borderwidth="1"
Target="_blank"/>
</form>
</body>
</html>
Commenti
L'evento AdCreated viene generato nel server dopo la creazione del AdRotator controllo, ma prima del rendering della pagina. Se la AdvertisementFile proprietà è impostata, l'evento AdCreated viene generato dopo che un annuncio è stato selezionato dal AdRotator controllo .
La generazione di un evento richiama il metodo di gestione degli eventi tramite un delegato. Per altre informazioni, vedere Procedura: Utilizzare eventi in un'applicazione Web Forms.
Note per gli eredi
Quando si esegue l'override OnAdCreated(AdCreatedEventArgs) in una classe derivata, assicurarsi di chiamare il metodo della classe di OnAdCreated(AdCreatedEventArgs) base.