GridView.PageIndexChanged Händelse
Definition
Viktigt
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Inträffar när en av sidsidesknapparna klickas, men när GridView kontrollen har hanterat växlingsåtgärden.
public:
event EventHandler ^ PageIndexChanged;public event EventHandler PageIndexChanged;member this.PageIndexChanged : EventHandler Public Custom Event PageIndexChanged As EventHandler Händelsetyp
Exempel
I följande exempel visas hur du använder PageIndexChanged händelsen för att visa det sidnummer som användaren har valt från personsökarraden.
<%@ 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>
Kommentarer
Händelsen PageIndexChanged utlöses när en av sidsidesknapparna klickas, men när GridView kontrollen har hanterat växlingsåtgärden. På så sätt kan du ange en metod för händelsehantering som utför en anpassad rutin, till exempel en anpassad växlingsåtgärd, när den här händelsen inträffar.
Om du vill fastställa indexet för den sida som användaren har valt använder du PageIndex kontrollens GridView egenskap.
Mer information om hur du hanterar händelser finns i Hantera och höja händelser.