Repeater.ItemDataBound 活動
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。
發生在控制項中的項目被資料綁定後，但在該項目 Repeater 被渲染到頁面之前。
public:
event System::Web::UI::WebControls::RepeaterItemEventHandler ^ ItemDataBound;public event System.Web.UI.WebControls.RepeaterItemEventHandler ItemDataBound;member this.ItemDataBound : System.Web.UI.WebControls.RepeaterItemEventHandler Public Custom Event ItemDataBound As RepeaterItemEventHandler 事件類型
範例
以下範例示範如何指定並編碼控制事件ItemDataBound的Repeater處理器。 資料在綁定到控制項中的項目 Repeater 後、但在呈現到頁面之前會被修改。
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>OnItemDataBound Example</title>
<script language="C#" runat="server">
void Page_Load(Object Sender, EventArgs e) {
if (!IsPostBack) {
ArrayList values = new ArrayList();
values.Add(new Evaluation("Razor Wiper Blades", "Good"));
values.Add(new Evaluation("Shoe-So-Soft Softening Polish", "Poor"));
values.Add(new Evaluation("DynaSmile Dental Fixative", "Fair"));
Repeater1.DataSource = values;
Repeater1.DataBind();
}
}
void R1_ItemDataBound(Object Sender, RepeaterItemEventArgs e) {
// This event is raised for the header, the footer, separators, and items.
// Execute the following logic for Items and Alternating Items.
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {
if (((Evaluation)e.Item.DataItem).Rating == "Good") {
((Label)e.Item.FindControl("RatingLabel")).Text= "<b>***Good***</b>";
}
}
}
public class Evaluation {
private string productid;
private string rating;
public Evaluation(string productid, string rating) {
this.productid = productid;
this.rating = rating;
}
public string ProductID {
get {
return productid;
}
}
public string Rating {
get {
return rating;
}
}
}
</script>
</head>
<body>
<h3>OnItemDataBound Example</h3>
<form id="form1" runat="server">
<br />
<asp:Repeater id="Repeater1" OnItemDataBound="R1_ItemDataBound" runat="server">
<HeaderTemplate>
<table border="1">
<tr>
<td><b>Product</b></td>
<td><b>Consumer Rating</b></td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> <asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "ProductID") %>' Runat="server"/> </td>
<td> <asp:Label id="RatingLabel" Text='<%# DataBinder.Eval(Container.DataItem, "Rating") %>' Runat="server"/> </td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<br />
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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 Evaluation("Razor Wiper Blades", "Good"))
values.Add(New Evaluation("Shoe-So-Soft Softening Polish", "Poor"))
values.Add(New Evaluation("DynaSmile Dental Fixative", "Fair"))
Repeater1.DataSource = values
Repeater1.DataBind()
End If
End Sub
Sub R1_ItemDataBound(Sender As Object, e As RepeaterItemEventArgs)
' This event is raised for the header, the footer, separators, and items.
' Execute the following logic for Items and Alternating Items.
If (e.Item.ItemType = ListItemType.Item) Or _
(e.Item.ItemType = ListItemType.AlternatingItem) Then
If CType(e.Item.DataItem, Evaluation).Rating = "Good" Then
CType(e.Item.FindControl("RatingLabel"), Label).Text = _
"<b>***Good***</b>"
End If
End If
End Sub
Public Class Evaluation
Private myProductid As String
Private myRating As String
Public Sub New(newProductid As String, newRating As String)
Me.myProductid = newProductid
Me.myRating = newRating
End Sub
Public ReadOnly Property ProductID() As String
Get
Return myProductid
End Get
End Property
Public ReadOnly Property Rating() As String
Get
Return myRating
End Get
End Property
End Class
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>OnItemDataBound Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>OnItemDataBound Example</h3>
<br />
<asp:Repeater id="Repeater1" OnItemDataBound="R1_ItemDataBound" runat="server">
<HeaderTemplate>
<table border="1">
<tr>
<td><b>Product</b></td>
<td><b>Consumer Rating</b></td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> <asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "ProductID") %>' Runat="server"/> </td>
<td> <asp:Label id="RatingLabel" Text='<%# DataBinder.Eval(Container.DataItem, "Rating") %>' Runat="server"/> </td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<br />
</form>
</body>
</html>
備註
當控制項 Repeater 為資料綁定時，此事件會被觸發。
欲了解更多如何處理事件的資訊，請參閱 「處理與提升事件」。
