DetailsViewPageEventArgs 类
定义
重要
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为 PageIndexChanging 事件提供数据。
public ref class DetailsViewPageEventArgs : System::ComponentModel::CancelEventArgspublic class DetailsViewPageEventArgs : System.ComponentModel.CancelEventArgstype DetailsViewPageEventArgs = class
inherit CancelEventArgsPublic Class DetailsViewPageEventArgs
Inherits CancelEventArgs- 继承
示例
下面的代码示例演示如何在控件处于编辑模式时，使用DetailsViewPageEventArgsDetailsView传递给 事件的事件处理程序PageIndexChanging的对象来取消分页操作。
<%@ 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">
void CustomerDetailsView_PageIndexChanging(Object sender, DetailsViewPageEventArgs e)
{
// Cancel the paging operation if the DetailsView control
// in edit mode.
if (CustomerDetailsView.CurrentMode == DetailsViewMode.Edit)
{
e.Cancel = true;
// Display an error message.
int newPage = e.NewPageIndex + 1;
MessageLabel.Text = "Please update the current record before to moving to page " +
newPage.ToString() + ".";
}
}
void CustomerDetailsView_ModeChanging(Object sender, DetailsViewModeEventArgs e)
{
// Clear the message label when the user cancels edit mode.
if (e.CancelingEdit)
{
MessageLabel.Text = "";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewPageEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewPageEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
autogeneraterows="true"
autogenerateeditbutton="true"
datakeynames="CustomerID"
allowpaging="true"
onpageindexchanging="CustomerDetailsView_PageIndexChanging"
onmodechanging="CustomerDetailsView_ModeChanging"
runat="server">
<pagersettings position="Bottom"/>
</asp:detailsview>
<br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
updatecommand="Update [Customers] Set
[CompanyName]=@CompanyName, [Address]=@Address,
[City]=@City, [PostalCode]=@PostalCode,
[Country]=@Country
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ 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">
Sub CustomerDetailsView_PageIndexChanging(ByVal sender As Object, ByVal e As DetailsViewPageEventArgs)
' Cancel the paging operation if the DetailsView control
' in edit mode.
If CustomerDetailsView.CurrentMode = DetailsViewMode.Edit Then
e.Cancel = True
' Display an error message.
Dim newPage As Integer = e.NewPageIndex + 1
MessageLabel.Text = "Please update the current record before to moving to page " & _
newPage.ToString() & "."
End If
End Sub
Sub CustomerDetailsView_ModeChanging(ByVal sender As Object, ByVal e As DetailsViewModeEventArgs)
' Clear the message label when the user cancels edit mode.
If e.CancelingEdit Then
MessageLabel.Text = ""
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewPageEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewPageEventArgs Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
autogeneraterows="true"
autogenerateeditbutton="true"
datakeynames="CustomerID"
allowpaging="true"
onpageindexchanging="CustomerDetailsView_PageIndexChanging"
onmodechanging="CustomerDetailsView_ModeChanging"
runat="server">
<pagersettings position="Bottom"/>
</asp:detailsview>
<br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the web.config file. -->
<asp:sqldatasource id="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
updatecommand="Update [Customers] Set
[CompanyName]=@CompanyName, [Address]=@Address,
[City]=@City, [PostalCode]=@PostalCode,
[Country]=@Country
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
DetailsView当页导航按钮 (其属性设置为“Page”的按钮CommandName时，控件将引发 PageIndexChanging 事件) 控件内单击，但在控件处理分页操作之前DetailsView。 这允许你提供一个事件处理程序，该事件处理程序执行自定义例程，例如，每当发生此事件时取消分页操作。
注意
寻呼按钮通常位于控件的 DetailsView 页导航行中。
对象 DetailsViewPageEventArgs 将传递给事件处理程序，这样就可以确定用户选择的页面的索引，并指示是否应取消分页操作。 若要确定用户选择的页面的索引，请使用 NewPageIndex 属性。 若要取消分页操作，请将 对象的 属性DetailsViewPageEventArgs设置为 Canceltrue。
有关如何处理事件的详细信息，请参阅 处理和引发事件。
有关 DetailsViewPageEventArgs 类的实例的初始属性值列表，请参见 DetailsViewPageEventArgs 构造函数。
构造函数
| DetailsViewPageEventArgs(Int32) |
初始化 DetailsViewPageEventArgs 类的新实例。 |
属性
| Cancel |
获取或设置指示是否应取消事件的值。 (继承自 CancelEventArgs) |
| NewPageIndex |
获取或设置要在 DetailsView 控件中显示的新页的索引。 |
方法
| Equals(Object) |
确定指定对象是否等于当前对象。 (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。 (继承自 Object) |
| GetType() |
获取当前实例的 Type。 (继承自 Object) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。 (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。 (继承自 Object) |
