.NET Framework Class Library GridViewPageEventHandler Delegate
Namespace:
System.Web.UI.WebControls
Assembly:
System.Web (in System.Web.dll)
Syntax
Public Delegate Sub GridViewPageEventHandler ( _
sender As Object, _
e As GridViewPageEventArgs _
)
public delegate void GridViewPageEventHandler(
Object sender,
GridViewPageEventArgs e
)
public delegate void GridViewPageEventHandler(
Object^ sender,
GridViewPageEventArgs^ e
)
type GridViewPageEventHandler =
delegate of
sender:Object *
e:GridViewPageEventArgs -> unit
Remarks
The GridView control raises the PageIndexChanging event when a pager button (a button with its CommandName property set to "Page") within the control is clicked, but before the GridView control handles the paging operation. This allows you to provide an event-handling method that performs a custom routine, such as canceling the paging operation, whenever this event occurs. .gif) Note |
|---|
Pager buttons are usually located in the pager row of a GridView control. |
When you create a GridViewPageEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.
Examples
The following example demonstrates how to programmatically add a GridViewPageEventHandler delegate to the PageIndexChanging event of a GridView control.
<%@ 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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Create a new GridView control.
Dim customersGridView As New GridView()
' Set the GridView object's properties.
customersGridView.ID = "CustomersGridView"
customersGridView.DataSourceID = "CustomersSource"
customersGridView.AutoGenerateColumns = True
customersGridView.EmptyDataText = "No data available."
customersGridView.AllowPaging = True
customersGridView.AutoGenerateEditButton = True
customersGridView.PagerSettings.Mode = PagerButtons.Numeric
customersGridView.PagerSettings.Position = PagerPosition.Bottom
customersGridView.PagerSettings.PageButtonCount = 10
customersGridView.PagerStyle.BackColor = System.Drawing.Color.LightBlue
Dim keyArray() As String = {"CustomerID"}
customersGridView.DataKeyNames = keyArray
' Programmatically register the event-handling methods.
AddHandler customersGridView.PageIndexChanging, AddressOf CustomersGridView_PageIndexChanging
AddHandler customersGridView.RowCancelingEdit, AddressOf CustomersGridView_RowCancelingEdit
' Add the GridView control to the Controls collection
' of the PlaceHolder control.
GridViewPlaceHolder.Controls.Add(customersGridView)
End Sub
Sub CustomersGridView_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
' User the sender parameter to retrieve the GridView control
' that raised the event.
Dim customersGridView As GridView = CType(sender, GridView)
' Cancel the paging operation if the user attempts to navigate
' to another page while the GridView control is in edit mode.
If customersGridView.EditIndex <> -1 Then
' Use the cancel property to cancel the paging operation.
e.Cancel = True
' Display an error message.
Dim newPageNumber As Integer = e.NewPageIndex + 1
Message.Text = "Please update the record before moving to page " & _
newPageNumber.ToString() & "."
Else
' Clear the error message.
Message.Text = ""
End If
End Sub
Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
' Clear the error message.
Message.Text = ""
End Sub
</script>
<html >
<head runat="server">
<title>GridViewPageEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewPageEventHandler Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:placeholder id="GridViewPlaceHolder"
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="CustomersSource"
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="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 Page_Load(Object sender, EventArgs e)
{
// Create a new GridView control.
GridView customersGridView = new GridView();
// Set the GridView object's properties.
customersGridView.ID = "CustomersGridView";
customersGridView.DataSourceID = "CustomersSource";
customersGridView.AutoGenerateColumns = true;
customersGridView.EmptyDataText = "No data available.";
customersGridView.AllowPaging = true;
customersGridView.AutoGenerateEditButton = true;
customersGridView.PagerSettings.Mode = PagerButtons.Numeric;
customersGridView.PagerSettings.Position = PagerPosition.Bottom;
customersGridView.PagerSettings.PageButtonCount = 10;
customersGridView.PagerStyle.BackColor = System.Drawing.Color.LightBlue;
customersGridView.DataKeyNames = new String[] { "CustomerID" };
// Programmatically register the event-handling methods.
customersGridView.PageIndexChanging += new GridViewPageEventHandler(this.CustomersGridView_PageIndexChanging);
customersGridView.RowCancelingEdit += new GridViewCancelEditEventHandler(this.CustomersGridView_RowCancelingEdit);
// Add the GridView control to the Controls collection
// of the PlaceHolder control.
GridViewPlaceHolder.Controls.Add(customersGridView);
}
void CustomersGridView_PageIndexChanging(Object sender, GridViewPageEventArgs e)
{
// User the sender parameter to retrieve the GridView control
// that raised the event.
GridView customersGridView = (GridView)sender;
// Cancel the paging operation if the user attempts to navigate
// to another page while the GridView control is in edit mode.
if (customersGridView.EditIndex != -1)
{
// Use the cancel property to cancel the paging operation.
e.Cancel = true;
// Display an error message.
int newPageNumber = e.NewPageIndex + 1;
Message.Text = "Please update the record before moving to page " +
newPageNumber.ToString() + ".";
}
else
{
// Clear the error message.
Message.Text = "";
}
}
void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
{
// Clear the error message.
Message.Text = "";
}
</script>
<html >
<head runat="server">
<title>GridViewPageEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewPageEventHandler Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:placeholder id="GridViewPlaceHolder"
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="CustomersSource"
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>
The following example demonstrates how to declaratively add a GridViewPageEventHandler delegate to the PageIndexChanging event of a GridView control.
<%@ 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_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
' Cancel the paging operation if the user attempts to navigate
' to another page while the GridView control is in edit mode.
If CustomersGridView.EditIndex <> -1 Then
' Use the Cancel property to cancel the paging operation.
e.Cancel = True
' Display an error message.
Dim newPageNumber As Integer = e.NewPageIndex + 1
Message.Text = "Please update the record before moving to page " & _
newPageNumber.ToString() & "."
Else
' Clear the error message.
Message.Text = ""
End If
End Sub
Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
' Clear the error message.
Message.Text = ""
End Sub
</script>
<html >
<head runat="server">
<title>GridView PageIndexChanging Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanging 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"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onpageindexchanging="CustomersGridView_PageIndexChanging"
onrowcancelingedit="CustomersGridView_RowCancelingEdit"
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]"
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="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_PageIndexChanging(Object sender, GridViewPageEventArgs e)
{
// Cancel the paging operation if the user attempts to navigate
// to another page while the GridView control is in edit mode.
if (CustomersGridView.EditIndex != -1)
{
// Use the Cancel property to cancel the paging operation.
e.Cancel = true;
// Display an error message.
int newPageNumber = e.NewPageIndex + 1;
Message.Text = "Please update the record before moving to page " +
newPageNumber.ToString() + ".";
}
else
{
// Clear the error message.
Message.Text = "";
}
}
void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
{
// Clear the error message.
Message.Text = "";
}
</script>
<html >
<head runat="server">
<title>GridView PageIndexChanging Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanging 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"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onpageindexchanging="CustomersGridView_PageIndexChanging"
onrowcancelingedit="CustomersGridView_RowCancelingEdit"
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]"
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>
Version Information
.NET FrameworkSupported in: 4, 3.5, 3.0, 2.0
Platforms
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role not supported), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
See Also
|
Bibliothèque de classes .NET Framework GridViewPageEventHandler, délégué
Espace de noms :
System.Web.UI.WebControls
Assembly :
System.Web (dans System.Web.dll)
Syntaxe
Public Delegate Sub GridViewPageEventHandler ( _
sender As Object, _
e As GridViewPageEventArgs _
)
public delegate void GridViewPageEventHandler(
Object sender,
GridViewPageEventArgs e
)
public delegate void GridViewPageEventHandler(
Object^ sender,
GridViewPageEventArgs^ e
)
type GridViewPageEventHandler =
delegate of
sender:Object *
e:GridViewPageEventArgs -> unit
Notes
Le contrôle GridView déclenche l'événement PageIndexChanging suite à un clic sur le bouton du pagineur (bouton dont la propriété CommandName a la valeur "Page"), mais avant que le contrôle GridView ne gère l'opération de pagination. Cela vous permet de fournir une méthode de gestion d'événements qui exécute une routine personnalisée, par exemple l'annulation de l'opération de pagination, lorsque cet événement se produit. | Remarque |
|---|
Les boutons du pagineur se trouvent habituellement sur la ligne du pagineur d'un contrôle GridView. |
Lorsque vous créez un délégué GridViewPageEventHandler, vous spécifiez la méthode qui gérera l'événement. Pour associer l'événement à votre gestionnaire d'événements, ajoutez une instance du délégué à l'événement. Le gestionnaire d'événements est appelé chaque fois qu'un événement se produit, sauf si vous supprimez le délégué. Pour plus d'informations sur les délégués de gestionnaires d'événements, consultez Événements et délégués.
Exemples
L'exemple suivant montre comment ajouter par programme un délégué GridViewPageEventHandler à l'événement PageIndexChanging d'un contrôle GridView.
<%@ 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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Create a new GridView control.
Dim customersGridView As New GridView()
' Set the GridView object's properties.
customersGridView.ID = "CustomersGridView"
customersGridView.DataSourceID = "CustomersSource"
customersGridView.AutoGenerateColumns = True
customersGridView.EmptyDataText = "No data available."
customersGridView.AllowPaging = True
customersGridView.AutoGenerateEditButton = True
customersGridView.PagerSettings.Mode = PagerButtons.Numeric
customersGridView.PagerSettings.Position = PagerPosition.Bottom
customersGridView.PagerSettings.PageButtonCount = 10
customersGridView.PagerStyle.BackColor = System.Drawing.Color.LightBlue
Dim keyArray() As String = {"CustomerID"}
customersGridView.DataKeyNames = keyArray
' Programmatically register the event-handling methods.
AddHandler customersGridView.PageIndexChanging, AddressOf CustomersGridView_PageIndexChanging
AddHandler customersGridView.RowCancelingEdit, AddressOf CustomersGridView_RowCancelingEdit
' Add the GridView control to the Controls collection
' of the PlaceHolder control.
GridViewPlaceHolder.Controls.Add(customersGridView)
End Sub
Sub CustomersGridView_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
' User the sender parameter to retrieve the GridView control
' that raised the event.
Dim customersGridView As GridView = CType(sender, GridView)
' Cancel the paging operation if the user attempts to navigate
' to another page while the GridView control is in edit mode.
If customersGridView.EditIndex <> -1 Then
' Use the cancel property to cancel the paging operation.
e.Cancel = True
' Display an error message.
Dim newPageNumber As Integer = e.NewPageIndex + 1
Message.Text = "Please update the record before moving to page " & _
newPageNumber.ToString() & "."
Else
' Clear the error message.
Message.Text = ""
End If
End Sub
Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
' Clear the error message.
Message.Text = ""
End Sub
</script>
<html >
<head runat="server">
<title>GridViewPageEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewPageEventHandler Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:placeholder id="GridViewPlaceHolder"
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="CustomersSource"
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="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 Page_Load(Object sender, EventArgs e)
{
// Create a new GridView control.
GridView customersGridView = new GridView();
// Set the GridView object's properties.
customersGridView.ID = "CustomersGridView";
customersGridView.DataSourceID = "CustomersSource";
customersGridView.AutoGenerateColumns = true;
customersGridView.EmptyDataText = "No data available.";
customersGridView.AllowPaging = true;
customersGridView.AutoGenerateEditButton = true;
customersGridView.PagerSettings.Mode = PagerButtons.Numeric;
customersGridView.PagerSettings.Position = PagerPosition.Bottom;
customersGridView.PagerSettings.PageButtonCount = 10;
customersGridView.PagerStyle.BackColor = System.Drawing.Color.LightBlue;
customersGridView.DataKeyNames = new String[] { "CustomerID" };
// Programmatically register the event-handling methods.
customersGridView.PageIndexChanging += new GridViewPageEventHandler(this.CustomersGridView_PageIndexChanging);
customersGridView.RowCancelingEdit += new GridViewCancelEditEventHandler(this.CustomersGridView_RowCancelingEdit);
// Add the GridView control to the Controls collection
// of the PlaceHolder control.
GridViewPlaceHolder.Controls.Add(customersGridView);
}
void CustomersGridView_PageIndexChanging(Object sender, GridViewPageEventArgs e)
{
// User the sender parameter to retrieve the GridView control
// that raised the event.
GridView customersGridView = (GridView)sender;
// Cancel the paging operation if the user attempts to navigate
// to another page while the GridView control is in edit mode.
if (customersGridView.EditIndex != -1)
{
// Use the cancel property to cancel the paging operation.
e.Cancel = true;
// Display an error message.
int newPageNumber = e.NewPageIndex + 1;
Message.Text = "Please update the record before moving to page " +
newPageNumber.ToString() + ".";
}
else
{
// Clear the error message.
Message.Text = "";
}
}
void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
{
// Clear the error message.
Message.Text = "";
}
</script>
<html >
<head runat="server">
<title>GridViewPageEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewPageEventHandler Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:placeholder id="GridViewPlaceHolder"
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="CustomersSource"
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>
L'exemple suivant montre comment ajouter de façon déclarative un délégué GridViewPageEventHandler à l'événement PageIndexChanging d'un contrôle GridView.
<%@ 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_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
' Cancel the paging operation if the user attempts to navigate
' to another page while the GridView control is in edit mode.
If CustomersGridView.EditIndex <> -1 Then
' Use the Cancel property to cancel the paging operation.
e.Cancel = True
' Display an error message.
Dim newPageNumber As Integer = e.NewPageIndex + 1
Message.Text = "Please update the record before moving to page " & _
newPageNumber.ToString() & "."
Else
' Clear the error message.
Message.Text = ""
End If
End Sub
Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
' Clear the error message.
Message.Text = ""
End Sub
</script>
<html >
<head runat="server">
<title>GridView PageIndexChanging Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanging 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"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onpageindexchanging="CustomersGridView_PageIndexChanging"
onrowcancelingedit="CustomersGridView_RowCancelingEdit"
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]"
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="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_PageIndexChanging(Object sender, GridViewPageEventArgs e)
{
// Cancel the paging operation if the user attempts to navigate
// to another page while the GridView control is in edit mode.
if (CustomersGridView.EditIndex != -1)
{
// Use the Cancel property to cancel the paging operation.
e.Cancel = true;
// Display an error message.
int newPageNumber = e.NewPageIndex + 1;
Message.Text = "Please update the record before moving to page " +
newPageNumber.ToString() + ".";
}
else
{
// Clear the error message.
Message.Text = "";
}
}
void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
{
// Clear the error message.
Message.Text = "";
}
</script>
<html >
<head runat="server">
<title>GridView PageIndexChanging Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView PageIndexChanging 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"
autogenerateeditbutton="true"
datakeynames="CustomerID"
onpageindexchanging="CustomersGridView_PageIndexChanging"
onrowcancelingedit="CustomersGridView_RowCancelingEdit"
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]"
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>
Informations de version
.NET FrameworkPris en charge dans : 4, 3.5, 3.0, 2.0
Plateformes
Windows 7, Windows Vista SP1 ou ultérieur, Windows XP SP3, Windows XP SP2 Édition x64, Windows Server 2008 (installation minimale non prise en charge), Windows Server 2008 R2 (installation minimale prise en charge avec SP1 ou version ultérieure), Windows Server 2003 SP2
Le .NET Framework ne prend pas en charge toutes les versions de chaque plateforme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise du .NET Framework.
Voir aussi
RéférenceAutres ressources
|