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Repeater.OnItemCreated(RepeaterItemEventArgs) Metodo

Definizione

Genera l'evento ItemCreated.

protected:
 virtual void OnItemCreated(System::Web::UI::WebControls::RepeaterItemEventArgs ^ e);
protected virtual void OnItemCreated (System.Web.UI.WebControls.RepeaterItemEventArgs e);
abstract member OnItemCreated : System.Web.UI.WebControls.RepeaterItemEventArgs -> unit
override this.OnItemCreated : System.Web.UI.WebControls.RepeaterItemEventArgs -> unit
Protected Overridable Sub OnItemCreated (e As RepeaterItemEventArgs)

Parametri

e
RepeaterItemEventArgs

Oggetto RepeaterItemEventArgs che contiene i dati dell'evento.

Esempio

Nell'esempio seguente viene illustrato un modo per gestire l'evento ItemCreated del Repeater controllo. Una nuova riga di testo che indica il tipo di elemento viene visualizzata ogni volta che viene creato un Repeater elemento.

<%@ 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>
    <title>Repeater Example</title>
<script language="C#" runat="server">
       int Count = 1;
       void Page_Load(Object Sender, EventArgs e) {
 
          if (!IsPostBack) {
             ArrayList values = new ArrayList();
 
             values.Add(new PositionData("Microsoft", "Msft"));
             values.Add(new PositionData("Intel", "Intc"));
             values.Add(new PositionData("Dell", "Dell"));
 
             Repeater1.DataSource = values;
             Repeater1.DataBind();
          }
       }
 
       void R1_ItemCreated(Object Sender, RepeaterItemEventArgs e) {
          String iTypeText = "";
 
          switch (e.Item.ItemType) {
             case ListItemType.Item:
                iTypeText = "Item";
                break;
             case ListItemType.AlternatingItem:
                iTypeText = "AlternatingItem";
                break;
             case ListItemType.Header:
                iTypeText = "Header";
                break;
             case ListItemType.Footer:
                iTypeText = "Footer";
                break;
             case ListItemType.Separator:
                iTypeText = "Separator";
                break;
          }
          Label1.Text += "(" + Count++ + ") A Repeater " + iTypeText + " has been created; <br />";
       }    
 
       public class PositionData {
         
          private string name;
          private string ticker;
 
          public PositionData(string name, string ticker) {
             this.name = name;
             this.ticker = ticker;
          }
 
          public string Name {
             get {
                return name;
             }
          }
 
          public string Ticker {
             get {
               return ticker;
             }
          }
       }
 
    </script>
 
 </head>
 <body>
 
    <h3>Repeater Example</h3>
 
    <form id="form1" runat="server">
 
       <b>Repeater1:</b>
         
       <br />
         
       <asp:Repeater id="Repeater1" OnItemCreated="R1_ItemCreated" runat="server">
          <HeaderTemplate>
             <table border="1">
                <tr>
                   <td><b>Company</b></td>
                   <td><b>Symbol</b></td>
                </tr>
          </HeaderTemplate>
             
          <ItemTemplate>
             <tr>
                <td> <%# DataBinder.Eval(Container.DataItem, "Name") %> </td>
                <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %> </td>
             </tr>
          </ItemTemplate>
             
          <FooterTemplate>
             </table>
          </FooterTemplate>
             
       </asp:Repeater>
       <br />
         
       <asp:Label id="Label1" font-names="Verdana" ForeColor="Red" font-size="10pt" 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>
    <title>Repeater Example</title>
<script language="VB" runat="server">
    Dim Count As Integer = 1

    Sub Page_Load(Sender As Object, e As EventArgs)
        
        If Not IsPostBack Then
            Dim values As New ArrayList()
            
            values.Add(New PositionData("Microsoft", "Msft"))
            values.Add(New PositionData("Intel", "Intc"))
            values.Add(New PositionData("Dell", "Dell"))
            
            Repeater1.DataSource = values
            Repeater1.DataBind()
        End If
    End Sub

    Sub R1_ItemCreated(Sender As Object, e As RepeaterItemEventArgs)
        Dim iTypeText As String = ""
        
        Select Case e.Item.ItemType
            Case ListItemType.Item
                iTypeText = "Item"
            Case ListItemType.AlternatingItem
                iTypeText = "AlternatingItem"
            Case ListItemType.Header
                iTypeText = "Header"
            Case ListItemType.Footer
                iTypeText = "Footer"
            Case ListItemType.Separator
                iTypeText = "Separator"
        End Select
        Count = Count + 1
        Label1.Text &= "(" & Count & ") A Repeater " & iTypeText & _
            " has been created; <br />"
    End Sub

    Public Class PositionData
        
        Private myName As String
        Private myTicker As String        
        
        Public Sub New(newName As String, newTicker As String)
            Me.myName = newName
            Me.myTicker = newTicker
        End Sub 'New
        
        
        Public ReadOnly Property Name() As String
            Get
                Return myName
            End Get
        End Property        
        
        Public ReadOnly Property Ticker() As String
            Get
                Return myTicker
            End Get
        End Property
    End Class
     
    </script>
 
 </head>
 <body>
 
    <h3>Repeater Example</h3>
 
    <form id="form1" runat="server">
 
       <b>Repeater1:</b>
         
       <br />
         
       <asp:Repeater id="Repeater1" OnItemCreated="R1_ItemCreated" runat="server">
          <HeaderTemplate>
             <table border="1">
                <tr>
                   <td><b>Company</b></td>
                   <td><b>Symbol</b></td>
                </tr>
          </HeaderTemplate>
             
          <ItemTemplate>
             <tr>
                <td> <%# DataBinder.Eval(Container.DataItem, "Name") %> </td>
                <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %> </td>
             </tr>
          </ItemTemplate>
             
          <FooterTemplate>
             </table>
          </FooterTemplate>
             
       </asp:Repeater>
       <br />
         
       <asp:Label id="Label1" font-names="Verdana" ForeColor="Red" font-size="10pt" runat="server"/>
    </form>
 </body>
 </html>

Commenti

Quando viene generato un evento, il gestore dell'evento viene richiamato tramite un delegato. Per altre informazioni su come gestire gli eventi, vedere la gestione e generazione di eventi.

Note per gli eredi

Quando si esegue l'override OnItemCreated(RepeaterItemEventArgs) in una classe derivata, assicurarsi di chiamare il metodo della OnItemCreated(RepeaterItemEventArgs) classe base.

Si applica a

Vedi anche