通过

RepeaterItem.ItemIndex 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取 Repeater 控件的 Items 集合中的项的索引。

public:
 virtual property int ItemIndex { int get(); };
public virtual int ItemIndex { get; }
member this.ItemIndex : int
Public Overridable ReadOnly Property ItemIndex As Integer

属性值

Int32

Repeater 控件的 Items 集合中的项的索引。

示例

以下示例演示如何使用ItemIndex属性从Items控件集合显示控件中Repeater项的索引号。

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!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">

      void Page_Load(Object Sender, EventArgs e) 
      {
 
         if (!IsPostBack) 
         {
            ArrayList values = new ArrayList();
 
            values.Add(new PositionData("Item 1", "$6.00"));
            values.Add(new PositionData("Item 2", "$7.48"));
            values.Add(new PositionData("Item 3", "$9.96"));
 
            Repeater1.DataSource = values;
            Repeater1.DataBind();
         }

      }
      void Button_Click(Object Sender, EventArgs e) 
      {        
         Label1.Text = "The Items collection contains: <br />";

         foreach(RepeaterItem item in Repeater1.Items)
         {        
            Label1.Text += item.ItemIndex.ToString() + " - " +
                           ((DataBoundLiteralControl)item.Controls[0]).Text +
                           "<br />";
         }
      }    
 
      public class PositionData 
      {
        
         private string item;
         private string price;
 
         public PositionData(string item, string price) 
         {
            this.item = item;
            this.price = price;
         }
 
         public string Item 
         {
            get 
            {
               return item;
            }
         }
 
         public string Price 
         {
            get 
            {
               return price;
            }
         }
      }
 
   </script>
 
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>Repeater Example</h3>
         
      <br />
         
      <asp:Repeater id="Repeater1" 
                    runat="server">
         <HeaderTemplate>
            <table border="1">
               <tr>
                  <td><b>Item</b></td>
                  <td><b>Price</b></td>
               </tr>
         </HeaderTemplate>
             
         <ItemTemplate>
            <tr>
               <td> <%# DataBinder.Eval(Container.DataItem, "Item") %> </td>
               <td> <%# DataBinder.Eval(Container.DataItem, "Price") %> </td>
            </tr>
         </ItemTemplate>
            
         <FooterTemplate>
            </table>
         </FooterTemplate>
             
      </asp:Repeater>
      <br />

      <asp:Button id="Button1"
           Text="Display Items in Repeater"
           OnClick="Button_Click"
           runat="server"/>

      <br /><br />
         
      <asp:Label id="Label1"                 
                 runat="server"/>
   </form>
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!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">

    Sub Page_Load(Sender As Object, e As EventArgs)
        
        If Not IsPostBack Then
            Dim values As New ArrayList()
            
            values.Add(New PositionData("Item 1", "$6.00"))
            values.Add(New PositionData("Item 2", "$7.48"))
            values.Add(New PositionData("Item 3", "$9.96"))
            
            Repeater1.DataSource = values
            Repeater1.DataBind()
        End If
    End Sub
     
    Sub Button_Click(Sender As Object, e As EventArgs)
        Label1.Text = "The Items collection contains: <br />"
        
        Dim item As RepeaterItem
        For Each item In  Repeater1.Items
      Label1.Text &= item.ItemIndex.ToString() & " - " & _
          CType(item.Controls(0), DataBoundLiteralControl).Text & "<br />"
        Next item
    End Sub
 
    Public Class PositionData
        
        Private myItem As String
        Private myPrice As String        
        
        Public Sub New(newItem As String, newPrice As String)
            Me.myItem = newItem
            Me.myPrice = newPrice
        End Sub        
        
        Public ReadOnly Property Item() As String
            Get
                Return myItem
            End Get
        End Property        
        
        Public ReadOnly Property Price() As String
            Get
                Return myPrice
            End Get
        End Property
    End Class
 
   </script>
 
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>Repeater Example</h3>
         
      <br />
         
      <asp:Repeater id="Repeater1" 
                    runat="server">
         <HeaderTemplate>
            <table border="1">
               <tr>
                  <td><b>Item</b></td>
                  <td><b>Price</b></td>
               </tr>
         </HeaderTemplate>
             
         <ItemTemplate>
            <tr>
               <td> <%# DataBinder.Eval(Container.DataItem, "Item") %> </td>
               <td> <%# DataBinder.Eval(Container.DataItem, "Price") %> </td>
            </tr>
         </ItemTemplate>
            
         <FooterTemplate>
            </table>
         </FooterTemplate>
             
      </asp:Repeater>
      <br />

      <asp:Button id="Button1"
           Text="Display Items in Repeater"
           OnClick="Button_Click"
           runat="server"/>

      <br /><br />
         
      <asp:Label id="Label1"                 
                 runat="server"/>
   </form>
</body>
</html>

注解

ItemIndex使用属性从控件集合中确定控件Items中Repeater项的索引号。

备注

此属性仅适用于控件中的数据 Repeater 项。 属性ItemType必须设置为ListItemType.Item、ListItemType.AlternatingItem或 ListItemType.SelectedItem``ListItemType.EditItem。

适用于

另请参阅