Timer.OnTick(EventArgs) Metodo
Definizione
Importante
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protected:
virtual void OnTick(EventArgs ^ e);
protected virtual void OnTick (EventArgs e);
abstract member OnTick : EventArgs -> unit
override this.OnTick : EventArgs -> unit
Protected Overridable Sub OnTick (e As EventArgs)
Parametri
Esempio
L'esempio seguente mostra un controllo che visualizza un UpdatePanel prezzo delle azioni generato in modo casuale e il tempo in cui è stato generato il prezzo delle azioni. Il Timer controllo aggiorna il contenuto nel UpdatePanel controllo ogni 10 secondi. Il prezzo delle azioni e il tempo vengono impostati in un gestore per l'evento Tick .
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Timer Example Page</title>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
OriginalTime.Text = DateTime.Now.ToLongTimeString();
}
protected void Timer1_Tick(object sender, EventArgs e)
{
StockPrice.Text = GetStockPrice();
TimeOfPrice.Text = DateTime.Now.ToLongTimeString();
}
private string GetStockPrice()
{
double randomStockPrice = 50 + new Random().NextDouble();
return randomStockPrice.ToString("C");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:Timer ID="Timer1" OnTick="Timer1_Tick" runat="server" Interval="10000" />
<asp:UpdatePanel ID="StockPricePanel" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" />
</Triggers>
<ContentTemplate>
Stock price is <asp:Label id="StockPrice" runat="server"></asp:Label><BR />
as of <asp:Label id="TimeOfPrice" runat="server"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<div>
Page originally created at <asp:Label ID="OriginalTime" runat="server"></asp:Label>
</div>
</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>Timer Example Page</title>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
OriginalTime.Text = DateTime.Now.ToLongTimeString()
End Sub
Protected Sub Timer1_Tick(ByVal sender As Object, ByVal e As EventArgs)
StockPrice.Text = GetStockPrice()
TimeOfPrice.Text = DateTime.Now.ToLongTimeString()
End Sub
Private Function GetStockPrice() As String
Dim randomStockPrice As Double = 50 + New Random().NextDouble()
Return randomStockPrice.ToString("C")
End Function
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:Timer ID="Timer1" OnTick="Timer1_Tick" runat="server" Interval="10000" />
<asp:UpdatePanel ID="StockPricePanel" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" />
</Triggers>
<ContentTemplate>
Stock price is <asp:Label id="StockPrice" runat="server"></asp:Label><BR />
as of <asp:Label id="TimeOfPrice" runat="server"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<div>
Page originally created at <asp:Label ID="OriginalTime" runat="server"></asp:Label>
</div>
</form>
</body>
</html>
Commenti
L'evento Tick viene generato quando il numero di millisecondi specificati nella Interval proprietà è trascorso dopo il rendering della pagina Web o dopo l'evento precedente Tick .