GridView.PageIndexChanged Événement
Définition
Important
Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.
Se produit lorsqu'un clic est effectué sur un des boutons de pagineur, mais une fois que le contrôle GridView a géré l'opération de pagination.
public:
event EventHandler ^ PageIndexChanged;public event EventHandler PageIndexChanged;member this.PageIndexChanged : EventHandler Public Custom Event PageIndexChanged As EventHandler Type d'événement
Exemples
L’exemple suivant montre comment utiliser l’événement PageIndexChanged pour afficher le numéro de page sélectionné par l’utilisateur à partir de la ligne du paginateur.
<%@ 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>
Remarques
L’événement PageIndexChanged est déclenché lorsque l’un des boutons du pagineur est cliqué, mais une fois que le GridView contrôle a géré l’opération de pagination. Cela vous permet de fournir une méthode de gestion des événements qui effectue une routine personnalisée, telle qu’une opération de pagination personnalisée, chaque fois que cet événement se produit.
Pour déterminer l’index de la page sélectionnée par l’utilisateur, utilisez la PageIndex propriété du GridView contrôle.
Pour plus d’informations sur la façon de gérer les événements, consultez gestion et déclenchement d’événements.
