Repeater.CreateItem(Int32, ListItemType) Metodo

Riferimento

Definizione

Spazio dei nomi:: System.Web.UI.WebControls

Assembly:: System.Web.dll

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.

Crea un oggetto RepeaterItem con il tipo di elemento e il percorso specificati all'interno del controllo Repeater.

protected:
 virtual System::Web::UI::WebControls::RepeaterItem ^ CreateItem(int itemIndex, System::Web::UI::WebControls::ListItemType itemType);

protected virtual System.Web.UI.WebControls.RepeaterItem CreateItem (int itemIndex, System.Web.UI.WebControls.ListItemType itemType);

abstract member CreateItem : int * System.Web.UI.WebControls.ListItemType -> System.Web.UI.WebControls.RepeaterItem
override this.CreateItem : int * System.Web.UI.WebControls.ListItemType -> System.Web.UI.WebControls.RepeaterItem

Protected Overridable Function CreateItem (itemIndex As Integer, itemType As ListItemType) As RepeaterItem

Parametri

itemIndex: Int32

Percorso specificato all'interno del controllo Repeater in cui collocare l'elemento creato.

itemType: ListItemType

Oggetto ListItemType che rappresenta il tipo specificato dell'elemento Repeater da creare.

Restituisce

RepeaterItem

Nuovo oggetto RepeaterItem.

Esempio

Nell'esempio di codice seguente viene illustrato come eseguire l'override del CreateItem metodo in un controllo server personalizzato in modo che restituisca sempre un nuovo RepeaterItem indice e corrispondente e un tipo in un controllo server personalizzato Repeater .

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ 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>Custom Repeater - CreateItem - C# Example</title>
    <script language="C#" runat="server">
      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();
        }
      }

      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>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Repeater - CreateItem - C# Example</h3>
            
            <aspSample:CustomRepeaterCreateItem id="Repeater1" runat="server">
              <HeaderTemplate>
                <table border="1" cellpadding="4" cellspacing="0">
                  <tr>
                    <th>Company</th>
                    <th>Symbol</th>
                  </tr>
              </HeaderTemplate>
              <ItemTemplate>
                <tr>
                  <td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
                  <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
                </tr>
              </ItemTemplate>
              <FooterTemplate>
                </table>
              </FooterTemplate>
          </aspSample:CustomRepeaterCreateItem>
       </form>
    </body>
</html>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ 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>Custom Repeater - CreateItem - VB.NET Example</title>
        <script language="VB" runat="server">
            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

            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>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Repeater - CreateItem - VB.NET Example</h3>
            
            <aspSample:CustomRepeaterCreateItem id="Repeater1" runat="server" >
                    <HeaderTemplate>
                        <table border="1" cellpadding="4" cellspacing="0">
                            <tr>
                                <th>Company</th>
                                <th>Symbol</th>
                            </tr>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <tr>
                            <td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
                            <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
                        </tr>
                    </ItemTemplate>
                    <FooterTemplate>
                        </table>
                    </FooterTemplate>
                </aspSample:CustomRepeaterCreateItem>
        </form>
    </body>
</html>

using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomRepeaterCreateItem : System.Web.UI.WebControls.Repeater
  {
    protected override System.Web.UI.WebControls.RepeaterItem CreateItem(int itemIndex, System.Web.UI.WebControls.ListItemType itemType)
    {
      // Return a new RepeaterItem with the corresponding item index and type.
      return new System.Web.UI.WebControls.RepeaterItem(itemIndex, itemType);
    }
  }
}

Imports System.Web
Imports System.Security.Permissions

Namespace Samples.AspNet.VB.Controls
    <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class CustomRepeaterCreateItem
        Inherits System.Web.UI.WebControls.Repeater

        Protected Overrides Function CreateItem(ByVal itemIndex As Integer, ByVal itemType As System.Web.UI.WebControls.ListItemType) As System.Web.UI.WebControls.RepeaterItem

            ' Return a new RepeaterItem with the corresponding item index and type.
            Return New System.Web.UI.WebControls.RepeaterItem(itemIndex, itemType)
        End Function
    End Class
End Namespace

Si applica a

Vedi anche

Panoramica del controllo server Web ripetitore