Repeater.CreateItem メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

Repeater.CreateItem メソッド

このメソッドは、.NET Framework インフラストラクチャをサポートします。独自に作成したコードから直接使用するためのものではありません。

Repeater コントロール内の指定した位置に、指定した項目の型で RepeaterItem オブジェクトを作成します。

名前空間: System.Web.UI.WebControls
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

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

Visual Basic (使用法)

Dim itemIndex As Integer
Dim itemType As ListItemType
Dim returnValue As RepeaterItem

returnValue = Me.CreateItem(itemIndex, itemType)

protected virtual RepeaterItem CreateItem (
    int itemIndex,
    ListItemType itemType
)

C++

protected:
virtual RepeaterItem^ CreateItem (
    int itemIndex, 
    ListItemType itemType
)

protected RepeaterItem CreateItem (
    int itemIndex, 
    ListItemType itemType
)

JScript

protected function CreateItem (
    itemIndex : int, 
    itemType : ListItemType
) : RepeaterItem

パラメータ

itemIndex: 作成した項目を格納する Repeater コントロール内の指定位置。

itemType: 作成する Repeater 項目の指定した型を表す ListItemType。

戻り値
新しい RepeaterItem オブジェクト。

使用例

カスタムサーバーコントロールで CreateItem メソッドをオーバーライドして、常にカスタム Repeater サーバーコントロールに新しい RepeaterItem および対応するインデックスと型が返されるようにする方法を次のコード例に示します。

Visual Basic

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls"
 Assembly="Samples.AspNet.VB"
 %>
<%@ Page Language="VB" AutoEventWireup="True"
 %>
<HTML>
    <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>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls"
 Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
    <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.JSL.Controls"
 Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
    <HEAD>
        <title>Custom Repeater - CreateItem - VJ# Example</title>
    <script language="VJ#" runat="server">
        void Page_Load(Object Sender, EventArgs e) 
        {
            if (!get_IsPostBack()) {
                ArrayList values = new ArrayList();
                values.Add(new PositionData("Microsoft",
 "Msft"));
                values.Add(new PositionData("Intel",
 "Intc"));
                values.Add(new PositionData("Dell",
 "Dell"));
                Repeater1.set_DataSource(values);
                Repeater1.DataBind();
            }
        } //Page_Load

        public class PositionData 
        {
            private String name;
            private String ticker;

            public PositionData(String name, String ticker) 
            {
                this.name = name;
                this.ticker = ticker;
            } //PositionData

            /** @property 
             */
            public String get_Name()
            {
                return name;
            } //get_Name

            /** @property 
             */
            public String get_Ticker()
            {
                return ticker;
            } //get_Ticker
        } //PositionData 
    </script>
    </HEAD>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Repeater - CreateItem - VJ# 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.get_DataItem(), "Name")
 %></td>
              <td> <%# DataBinder.Eval(Container.get_DataItem(), "Ticker")
 %></td>
            </tr>
          </ItemTemplate>
          <FooterTemplate>
            </table>
          </FooterTemplate>
      </aspSample:CustomRepeaterCreateItem>
        </form>
    </body>
</HTML>

Visual Basic

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

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);
    }
  }
}

package Samples.AspNet.JSL.Controls; 

public class CustomRepeaterCreateItem
    extends System.Web.UI.WebControls.Repeater
{
    protected 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);
    } //CreateItem
} //CustomRepeaterCreateItem