RepeaterItemEventHandler 委托
表示将处理 Repeater 的 ItemCreated 和 ItemDataBound 事件的方法。
**命名空间:**System.Web.UI.WebControls
**程序集:**System.Web(在 system.web.dll 中)
语法
声明
Public Delegate Sub RepeaterItemEventHandler ( _
sender As Object, _
e As RepeaterItemEventArgs _
)
用法
Dim instance As New RepeaterItemEventHandler(AddressOf HandlerMethod)
public delegate void RepeaterItemEventHandler (
Object sender,
RepeaterItemEventArgs e
)
public delegate void RepeaterItemEventHandler (
Object^ sender,
RepeaterItemEventArgs^ e
)
/** @delegate */
public delegate void RepeaterItemEventHandler (
Object sender,
RepeaterItemEventArgs e
)
JScript 支持使用委托,但不支持进行新的声明。
参数
- sender
事件源。
- e
包含事件数据的 RepeaterItemEventArgs。
备注
当创建 RepeaterItemEventHandler 委托时,将标识处理事件的方法。若要使该事件与事件处理程序相关联,请将该委托的一个实例添加到事件中。除非移除了该委托,否则每当发生该事件时就调用事件处理程序。有关事件处理程序委托的更多信息,请参见 事件和委托。
有关处理事件的更多信息,请参见 使用事件。
示例
下面的示例说明如何指定和编写 Repeater 的 ItemCreated 事件的处理程序。只要创建一个 Repeater 项,就会有一行新的文本显示该项的类型。
<%@ 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>
平台
Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0
请参见
参考
System.Web.UI.WebControls 命名空间
Repeater 类
RepeaterItemEventArgs 类
Repeater.ItemCreated 事件
Repeater.ItemDataBound 事件