更新：2007 年 11 月
命名空間：
System.Web.UI.WebControls 組件：
System.Web.Extensions (在 System.Web.Extensions.dll 中)
Public Event PagePropertiesChanging As EventHandler(Of PagePropertiesChangingEventArgs)
Dim instance As ListView
Dim handler As EventHandler(Of PagePropertiesChangingEventArgs)
AddHandler instance.PagePropertiesChanging, handler
public event EventHandler<PagePropertiesChangingEventArgs> PagePropertiesChanging
public:
event EventHandler<PagePropertiesChangingEventArgs^>^ PagePropertiesChanging {
void add (EventHandler<PagePropertiesChangingEventArgs^>^ value);
void remove (EventHandler<PagePropertiesChangingEventArgs^>^ value);
}
/** @event */
public void add_PagePropertiesChanging (EventHandler<PagePropertiesChangingEventArgs> value)
/** @event */
public void remove_PagePropertiesChanging (EventHandler<PagePropertiesChangingEventArgs> value)
<asp:ListView OnPagePropertiesChanging="EventHandler" />
當頁面屬性變更時，但是在 ListView 控制項使用 SetPageProperties 方法設定新的值之前會引發 PagePropertiesChanging 事件。這可讓您在每次發生這個事件時執行自訂常式，例如清除 SelectedIndex 或 EditIndex 屬性。
PagePropertiesChangingEventArgs 物件會傳遞至事件處理常式，讓您判斷頁面上顯示的第一筆資料錄的索引。也可讓您判斷單一頁面上顯示的項目最大數目。
如需如何處理事件的詳細資訊，請參閱使用事件。
下列範例顯示如何建立 PagePropertiesChanging 事件的事件處理常式。
<%@ Page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub DeleteButton_Click(ByVal sender As Object, ByVal e As EventArgs)
' Check if an item is selected to delete it.
If ContactsListView.SelectedIndex >= 0 Then
ContactsListView.DeleteItem(ContactsListView.SelectedIndex)
Else
Message.Text = "No contact was selected."
End If
End Sub
Protected Sub ContactsListView_ItemDeleted(ByVal sender As Object, _
ByVal e As ListViewDeletedEventArgs)
' Check if an exception occurred to display an error message.
If Not (e.Exception Is Nothing) Then
Message.Text = "An exception occurred deleting the contact."
e.ExceptionHandled = True
Else
' Clear the selected index.
ContactsListView.SelectedIndex = -1
End If
End Sub
Protected Sub ContactsListView_PagePropertiesChanging(ByVal sender As Object, _
ByVal e As PagePropertiesChangingEventArgs)
' Clear the selected index.
ContactsListView.SelectedIndex = -1
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Clear the message label.
Message.Text = ""
End Sub
</script>
<html >
<head id="Head1" runat="server">
<title>ListView DeleteItem Example</title>
<style type="text/css">
body
{
font-size: 10pt;
font-family: Trebuchet MS, Arial, Tahoma;
text-align:center;
}
.item { background-color: #E0FFFF }
.selectedItem { background-color: #B0E0E6 }
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView DeleteItem Example</h3>
<asp:ListView ID="ContactsListView"
DataSourceID="ContactsDataSource"
DataKeyNames="ContactID"
OnItemDeleted="ContactsListView_ItemDeleted"
OnPagePropertiesChanging="ContactsListView_PagePropertiesChanging"
runat="server" >
<LayoutTemplate>
<table cellpadding="2" width="640px" id="tblProducts" runat="server">
<tr runat="server">
<th runat="server"> </th>
<th runat="server">ID</th>
<th runat="server">Account Number</th>
<th runat="server">LastName</th>
<th runat="server">Preferred Vendor</th>
</tr>
<tr runat="server" id="itemPlaceholder" />
</table>
<asp:DataPager ID="ContactsDataPager" runat="server" PageSize="15">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button"
ShowFirstPageButton="true"
ShowNextPageButton="false"
ShowPreviousPageButton="false" />
<asp:NumericPagerField ButtonCount="10" />
<asp:NextPreviousPagerField ButtonType="Button"
ShowLastPageButton="true"
ShowNextPageButton="false"
ShowPreviousPageButton="false" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr class="item" runat="server">
<td>
<asp:LinkButton ID="SelectButton" runat="server" CommandName="Select" Text="Select" />
</td>
<td>
<asp:Label ID="ContactIDLabel" runat="server" Text='<%# Eval("ContactID") %>' />
</td>
<td>
<asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="EmailLabel" runat="server" Text='<%# Eval("EmailAddress") %>' />
</td>
</tr>
</ItemTemplate>
<SelectedItemTemplate>
<tr class="selectedItem" runat="server">
<td> </td>
<td>
<asp:Label ID="ContactIDLabel" runat="server" Text='<%# Eval("ContactID") %>' />
</td>
<td>
<asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="EmailLabel" runat="server" Text='<%# Eval("EmailAddress") %>' />
</td>
</tr>
</SelectedItemTemplate>
</asp:ListView>
<br />
<br />
<asp:Button ID="DeleteButton"
Text="Delete Selected Contact"
OnClick="DeleteButton_Click"
runat="server" />
<br />
<asp:Label ID="Message"
ForeColor="Red"
runat="server"/>
<br/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="ContactsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT ContactID, FirstName, LastName, EmailAddress
FROM Person.Contact"
DeleteCommand="DELETE FROM Person.Contact WHERE (ContactID = @ContactID)" >
</asp:SqlDataSource>
</form>
</body>
</html>
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void DeleteButton_Click(object sender, EventArgs e)
{
//Check if an item is selected to delete it.
if (ContactsListView.SelectedIndex >= 0)
ContactsListView.DeleteItem(ContactsListView.SelectedIndex);
else
Message.Text = "No contact was selected.";
}
protected void ContactsListView_ItemDeleted(object sender, ListViewDeletedEventArgs e)
{
//Check if an exception occurred to display an error message.
if (e.Exception != null)
{
Message.Text = "An exception occurred deleting the contact.";
e.ExceptionHandled = true;
}
else
{
// Clear the selected index.
ContactsListView.SelectedIndex = -1;
}
}
protected void ContactsListView_PagePropertiesChanging(object sender,
PagePropertiesChangingEventArgs e)
{
//Clear the selected index.
ContactsListView.SelectedIndex = -1;
}
protected void Page_Load(object sender, EventArgs e)
{
//Clear the message label.
Message.Text = "";
}
</script>
<html >
<head id="Head1" runat="server">
<title>ListView DeleteItem Example</title>
<style type="text/css">
body
{
font-size: 10pt;
font-family: Trebuchet MS, Arial, Tahoma;
text-align:center;
}
.item { background-color: #E0FFFF }
.selectedItem { background-color: #B0E0E6 }
</style>
</head>
<body>
<form id="form1" runat="server">
<h3>ListView DeleteItem Example</h3>
<asp:ListView ID="ContactsListView"
DataSourceID="ContactsDataSource"
DataKeyNames="ContactID"
OnItemDeleted="ContactsListView_ItemDeleted"
OnPagePropertiesChanging="ContactsListView_PagePropertiesChanging"
runat="server" >
<LayoutTemplate>
<table cellpadding="2" width="640px" id="tblProducts" runat="server">
<tr runat="server">
<th runat="server"> </th>
<th runat="server">ID</th>
<th runat="server">Account Number</th>
<th runat="server">LastName</th>
<th runat="server">Preferred Vendor</th>
</tr>
<tr runat="server" id="itemPlaceholder" />
</table>
<asp:DataPager ID="ContactsDataPager" runat="server" PageSize="15">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button"
ShowFirstPageButton="true"
ShowNextPageButton="false"
ShowPreviousPageButton="false" />
<asp:NumericPagerField ButtonCount="10" />
<asp:NextPreviousPagerField ButtonType="Button"
ShowLastPageButton="true"
ShowNextPageButton="false"
ShowPreviousPageButton="false" />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr class="item" runat="server">
<td>
<asp:LinkButton ID="SelectButton" runat="server" CommandName="Select" Text="Select" />
</td>
<td>
<asp:Label ID="ContactIDLabel" runat="server" Text='<%# Eval("ContactID") %>' />
</td>
<td>
<asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="EmailLabel" runat="server" Text='<%# Eval("EmailAddress") %>' />
</td>
</tr>
</ItemTemplate>
<SelectedItemTemplate>
<tr class="selectedItem" runat="server">
<td> </td>
<td>
<asp:Label ID="ContactIDLabel" runat="server" Text='<%# Eval("ContactID") %>' />
</td>
<td>
<asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="EmailLabel" runat="server" Text='<%# Eval("EmailAddress") %>' />
</td>
</tr>
</SelectedItemTemplate>
</asp:ListView>
<br />
<br />
<asp:Button ID="DeleteButton"
Text="Delete Selected Contact"
OnClick="DeleteButton_Click"
runat="server" />
<br />
<asp:Label ID="Message"
ForeColor="Red"
runat="server"/>
<br/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="ContactsDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT ContactID, FirstName, LastName, EmailAddress
FROM Person.Contact"
DeleteCommand="DELETE FROM Person.Contact WHERE (ContactID = @ContactID)" >
</asp:SqlDataSource>
</form>
</body>
</html>
Windows Vista, Windows XP SP2, Windows Server 2003
.NET Framework 和 .NET Compact Framework 並不支援各種平台的所有版本。如需支援平台版本的相關資訊，請參閱 .NET Framework 系統需求。
.NET Framework
支援版本：3.5
參考
其他資源