RepeaterItem.ItemIndex 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
public:
virtual property int ItemIndex { int get(); };public virtual int ItemIndex { get; }member this.ItemIndex : intPublic Overridable ReadOnly Property ItemIndex As Integer屬性值
在控制項的 Repeater 集合中，Items 控制項的項目索引。
範例
下列範例示範如何使用 ItemIndex 屬性，從 Items 控制項的集合顯示 控制項中 Repeater 專案的索引編號。
<%@ 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>
備註
ItemIndex使用 屬性，從 Items 控制項的集合中判斷 控制項中 Repeater 專案的索引編號。
注意
此屬性僅適用于 控制項中的資料 Repeater 項。 屬性 ItemType 必須設定為 ListItemType.Item 、 ListItemType.AlternatingItem 、 ListItemType.SelectedItem 或 ListItemType.EditItem 。