GridView.PageIndexChanged 事件
定义
重要
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在单击某一页导航按钮时，但在 GridView 控件处理分页操作之后发生。
public:
event EventHandler ^ PageIndexChanged;public event EventHandler PageIndexChanged;member this.PageIndexChanged : EventHandler Public Custom Event PageIndexChanged As EventHandler 事件类型
示例
以下示例演示如何使用 PageIndexChanged 事件显示用户从寻呼行中选择的页码。
<%@ 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 CustomersGridView_DataBound(Object sender, EventArgs e)
{
if (!IsPostBack)
{
// Call a helper method to display the current page number
// when the page is first loaded.
DisplayCurrentPage();
}
}
void CustomersGridView_PageIndexChanged(Object sender, EventArgs e)
{
// Call a helper method to display the current page number
// when the user navigates to a different page.
DisplayCurrentPage();
}
void DisplayCurrentPage()
{
// Calculate the current page number.
int currentPage = CustomersGridView.PageIndex + 1;
// Display the current page number.
Message.Text = "Page " + currentPage.ToString() + " of " +
CustomersGridView.PageCount.ToString() + ".";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView PageIndexChanged Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanged Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="true"
emptydatatext="No data available."
allowpaging="true"
ondatabound="CustomersGridView_DataBound"
onpageindexchanged="CustomersGridView_PageIndexChanged"
runat="server">
<pagersettings mode="Numeric"
position="Bottom"
pagebuttoncount="10"/>
<pagerstyle backcolor="LightBlue"/>
</asp:gridview>
<!-- 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="CustomersSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
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 CustomersGridView_DataBound(ByVal sender As Object, ByVal e As EventArgs)
If Not IsPostBack Then
' Call a helper method to display the current page number
' when the page is first loaded.
DisplayCurrentPage()
End If
End Sub
Sub CustomersGridView_PageIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
' Call a helper method to display the current page number
' when the user navigates to a different page.
DisplayCurrentPage()
End Sub
Sub DisplayCurrentPage()
' Calculate the current page number.
Dim currentPage As Integer = CustomersGridView.PageIndex + 1
' Display the current page number.
Message.Text = "Page " & currentPage.ToString() & " of " & _
CustomersGridView.PageCount.ToString() & "."
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView PageIndexChanged Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanged Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="true"
emptydatatext="No data available."
allowpaging="true"
ondatabound="CustomersGridView_DataBound"
onpageindexchanged="CustomersGridView_PageIndexChanged"
runat="server">
<pagersettings mode="Numeric"
position="Bottom"
pagebuttoncount="10"/>
<pagerstyle backcolor="LightBlue"/>
</asp:gridview>
<!-- 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="CustomersSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
当 PageIndexChanged 单击其中一个寻呼按钮时，但在控件处理分页操作之后 GridView ，将引发 该事件。 这使你能够提供一个事件处理方法，该方法在发生此事件时执行自定义例程，例如自定义分页操作。
若要确定用户选择的页面的索引，请使用 PageIndex 控件的 GridView 属性。
有关如何处理事件的详细信息，请参阅 处理和引发事件。
