RepeaterItemEventArgs.Item プロパティとは何？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

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RepeaterItemEventArgs.Item プロパティ

イベントに関連付けられている RepeaterItem を取得します。

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)

Public ReadOnly Property
 Item As RepeaterItem

Visual Basic (使用法)

Dim instance As RepeaterItemEventArgs
Dim value As RepeaterItem

value = instance.Item

public RepeaterItem Item { get; }

C++

public:
property RepeaterItem^ Item {
    RepeaterItem^ get ();
}

/** @property */
public RepeaterItem get_Item ()

JScript

public function get Item
 () : RepeaterItem

プロパティ値
イベントに関連付けられている RepeaterItem。

解説

このプロパティを使用して、このイベントに関連付けられている RepeaterItem のプロパティにアクセスします。

使用例

Item プロパティを使用して、このイベントに関連付けられている項目の ItemType を確認する方法の例を次に示します。

Visual Basic

<%@ Page Language="VB" AutoEventWireup="True"
 %>
<html>
 <head>
    <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>
 
 </head>
 <body>
 
    <h3>Repeater Example</h3>
 
    <form runat=server>
 
       <b>Repeater1:</b>
         
       <p>
         
       <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>
       <p>
         
       <asp:Label id=Label1 font-name="Verdana"
 ForeColor="Red" font-size="10pt"
 runat="server"/>
    </form>
 </body>
 </html>

<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
 <head>
    <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 runat=server>
 
       <b>Repeater1:</b>
         
       <p>
         
       <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>
       <p>
         
       <asp:Label id=Label1 font-name="Verdana" ForeColor="Red"
 font-size="10pt" runat="server"/>
    </form>
 </body>
 </html>