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GridViewPageEventArgs Class

Provides data for the PageIndexChanging event.

System.Object
  System.EventArgs
    System.ComponentModel.CancelEventArgs
      System.Web.UI.WebControls.GridViewPageEventArgs

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public class GridViewPageEventArgs : CancelEventArgs

The GridViewPageEventArgs type exposes the following members.

  NameDescription
Public methodGridViewPageEventArgsInitializes a new instance of the GridViewPageEventArgs class.
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  NameDescription
Public propertyCancelGets or sets a value indicating whether the event should be canceled. (Inherited from CancelEventArgs.)
Public propertyNewPageIndexGets or sets the index of the new page to display in the GridView control.
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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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.

NoteNote

Pager buttons are usually located in the pager row of a GridView control.

A GridViewPageEventArgs object is passed to the event-handling method, which allows you to determine the index of the page selected by the user and to indicate that the paging operation should be canceled. To cancel the paging operation, set the CancelEventArgs.Cancel property of the GridViewPageEventArgs object to true.

For more information about handling events, see Consuming Events.

For a list of initial property values for an instance of GridViewPageEventArgs, see the GridViewPageEventArgs constructor.

The following example demonstrates how to use the GridViewPageEventArgs object passed to the event-handling method to determine the index of the page selected by the user and to cancel the paging operation.


<%@ 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 xmlns="http://www.w3.org/1999/xhtml" >
  <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>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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