RepeaterItemEventHandler Delegado

Definición

Representa el método que controlará los eventos ItemCreated y ItemDataBound de un control Repeater.Represents the method that will handle the ItemCreated and ItemDataBound events of a Repeater.

public delegate void RepeaterItemEventHandler(System::Object ^ sender, RepeaterItemEventArgs ^ e);
public delegate void RepeaterItemEventHandler(object sender, RepeaterItemEventArgs e);
type RepeaterItemEventHandler = delegate of obj * RepeaterItemEventArgs -> unit
Public Delegate Sub RepeaterItemEventHandler(sender As Object, e As RepeaterItemEventArgs)

Parámetros

sender
Object

Origen del evento.The source of the event.

e
RepeaterItemEventArgs

Objeto RepeaterItemEventArgs que contiene los datos del evento.A RepeaterItemEventArgs that contains the event data.

Ejemplos

En el ejemplo siguiente se muestra cómo especificar y codificar un controlador para el ItemCreated evento de Repeater .The following example demonstrates how to specify and code a handler for the ItemCreated event of the Repeater. Nueva línea de texto que indica que el tipo de elemento se muestra cada vez que Repeater se crea un elemento.A new line of text indicating the item type is displayed whenever a Repeater item is created.

<%@ 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">

<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>
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Repeater Example</title>
</head>
<body>
    <form id="form1" runat="server">

    <h3>Repeater Example</h3>
 
       <p style="font-weight: bold">Repeater1:</p>
         
       <asp:Repeater ID="Repeater1" OnItemCreated="R1_ItemCreated" runat="server">
          <HeaderTemplate>
             <table border="1">
                <tr>
                   <td style="font-weight:bold">Company</td>
                   <td style="font-weight:bold">Symbol</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="Green" Font-Size="10pt" Runat="server"/>
    </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 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        
        
        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>
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Repeater Example</title>
</head>
<body>
    <form id="form1" runat="server">

    <h3>Repeater Example</h3>
 
       <p style="font-weight: bold">Repeater1:</p>
         
       <asp:Repeater ID="Repeater1" OnItemCreated="R1_ItemCreated" runat="server">
          <HeaderTemplate>
             <table border="1">
                <tr>
                   <td style="font-weight:bold">Company</td>
                   <td style="font-weight:bold">Symbol</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="Green" Font-Size="10pt" Runat="server"/>
    </form>
 </body>
 </html>

Comentarios

Cuando se crea un delegado RepeaterItemEventHandler, se identifica el método que controlará el evento.When you create a RepeaterItemEventHandler delegate, you identify the method that will handle the event. Para asociar el evento al controlador, se debe agregar una instancia del delegado al evento.To associate the event with your event handler, add an instance of the delegate to the event. Siempre que se produce el evento, se llama a su controlador, a menos que se quite el delegado.The event handler is called whenever the event occurs, unless you remove the delegate. Para obtener más información sobre los delegados de controladores de eventos, vea controlar y provocar eventos.For more information about event handler delegates, see Handling and Raising Events.

Para obtener más información acerca de cómo controlar eventos, vea controlar y provocar eventos.For more information about how to handle events, see Handling and Raising Events.

Métodos de extensión

GetMethodInfo(Delegate)

Obtiene un objeto que representa el método representado por el delegado especificado.Gets an object that represents the method represented by the specified delegate.

Se aplica a

Consulte también