Repeater.OnDataBinding(EventArgs) Methode
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Hiermee wordt de DataBinding gebeurtenis gegenereerd.
protected:
override void OnDataBinding(EventArgs ^ e);protected override void OnDataBinding(EventArgs e);override this.OnDataBinding : EventArgs -> unitProtected Overrides Sub OnDataBinding (e As EventArgs)Parameters
Voorbeelden
In de volgende codevoorbeelden ziet u hoe u de OnDataBinding methode in een aangepast serverbesturingselement overschrijft, zodat als het gebeurtenisargument een opdrachttype is, het Repeater besturingselement altijd de OnItemCommand gebeurtenis aanroept en de gebeurtenis opbelt of de gebeurtenis retourneert false en annuleert.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ 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>Custom Repeater - OnDataBinding - C# Example</title>
<script language="C#" runat="server">
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();
}
}
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>
<form id="Form1" method="post" runat="server">
<h3>Custom Repeater - OnDataBinding - C# Example</h3>
<aspSample:CustomRepeaterOnDataBinding id="Repeater1" runat="server">
<HeaderTemplate>
<table border="1" cellpadding="4" cellspacing="0">
<tr>
<th>Company</th>
<th>Symbol</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
<td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</aspSample:CustomRepeaterOnDataBinding>
</form>
</body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ 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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Custom Repeater - OnDataBinding - VB.NET 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("Microsoft", "Msft"))
values.Add(New PositionData("Intel", "Intc"))
values.Add(New PositionData("Dell", "Dell"))
Repeater1.DataSource = values
Repeater1.DataBind()
End If
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>
<form id="Form1" method="post" runat="server">
<h3>Custom Repeater - OnDataBinding - VB.NET Example</h3>
<aspSample:CustomRepeaterOnDataBinding id="Repeater1" runat="server" >
<HeaderTemplate>
<table border="1" cellpadding="4" cellspacing="0">
<tr>
<th>Company</th>
<th>Symbol</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
<td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</aspSample:CustomRepeaterOnDataBinding>
</form>
</body>
</html>
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomRepeaterOnDataBinding : System.Web.UI.WebControls.Repeater
{
protected override void OnDataBinding(System.EventArgs e)
{
// Raise the OnDataBinding event.
base.OnDataBinding(e);
// Clear out the controls collection and child viewstate.
this.Controls.Clear();
this.ClearChildViewState();
// Create a new control hierarchy.
this.CreateControlHierarchy(true);
this.ChildControlsCreated = true;
}
}
}
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomRepeaterOnDataBinding
Inherits System.Web.UI.WebControls.Repeater
Protected Overrides Sub OnDataBinding(ByVal e As System.EventArgs)
' Raise the OnDataBinding event.
MyBase.OnDataBinding(e)
' Clear out the controls collection and child viewstate.
Me.Controls.Clear()
Me.ClearChildViewState()
' Create a new control hierarchy.
Me.CreateControlHierarchy(True)
Me.ChildControlsCreated = True
End Sub
End Class
End Namespace