DataGridPageChangedEventArgs Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides data for the PageIndexChanged event of the DataGrid control. This class cannot be inherited.
public ref class DataGridPageChangedEventArgs sealed : EventArgspublic ref class DataGridPageChangedEventArgs : EventArgspublic sealed class DataGridPageChangedEventArgs : EventArgspublic class DataGridPageChangedEventArgs : EventArgstype DataGridPageChangedEventArgs = class
inherit EventArgsPublic NotInheritable Class DataGridPageChangedEventArgs
Inherits EventArgsPublic Class DataGridPageChangedEventArgs
Inherits EventArgs- Inheritance
Examples
The following code example demonstrates how to specify and code a handler for the PageIndexChanged event. It displays pages on the DataGrid control in 10-item increments.
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
private ICollection CreateDataSource()
{
// Create sample data for the DataGrid control.
DataTable dt = new DataTable();
DataRow dr;
// Define the columns of the table.
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(String)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(Double)));
// Populate the table with sample values.
for (int i = 0; i <= 100; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
private void Page_Load(Object sender, EventArgs e)
{
// Load sample data only once, when the page is first loaded.
if (!IsPostBack)
{
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
private void Check_Change(Object sender, EventArgs e)
{
// Allow or prevent paging depending
// on the user's selection.
ItemsGrid.AllowPaging = AllowPagingCheckBox.Checked;
// Rebind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
private void Grid_Change(Object sender, DataGridPageChangedEventArgs e)
{
// For the DataGrid control to navigate to the correct page when
// paging is allowed, the CurrentPageIndex property must be updated
// programmatically. This process is usually accomplished in the
// event-handling method for the PageIndexChanged event.
// Set CurrentPageIndex to the page the user clicked.
ItemsGrid.CurrentPageIndex = e.NewPageIndex;
// Rebind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>DataGrid AllowPaging Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>DataGrid AllowPaging Example</h3>
<p>Select whether to allow paging in the DataGrid control.<br />
<asp:CheckBox id="AllowPagingCheckBox"
Text="Allow paging"
AutoPostBack="True"
Checked="True"
OnCheckedChanged="Check_Change"
runat="server" />
</p>
<hr />
<asp:Label runat="server"
AssociatedControlID="ItemsGrid"
Font-Bold="true">Product List</asp:Label>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="Gray"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="False"
UseAccessibleHeader="true"
PageSize="10"
AllowPaging="True"
OnPageIndexChanged="Grid_Change">
<HeaderStyle BackColor="LightBlue" />
<Columns>
<asp:BoundColumn DataField="IntegerValue"
SortExpression="IntegerValue"
ItemStyle-HorizontalAlign="center"
HeaderText="Item" />
<asp:BoundColumn DataField="StringValue"
HeaderText="Description"
ItemStyle-HorizontalAlign="left"
SortExpression="StringValue" />
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
SortExpression="CurrencyValue"
DataFormatString="{0:c}" />
</Columns>
<ItemStyle HorizontalAlign="Right" />
</asp:DataGrid>
</div>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Function CreateDataSource() As ICollection
' Create sample data for the DataGrid control.
Dim dt As DataTable = New DataTable()
Dim dr As DataRow
' Define the columns of the table.
dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
' Populate the table with sample values.
Dim i As Integer
For i = 0 To 100
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = 1.23 * (i + 1)
dt.Rows.Add(dr)
Next i
Dim dv As DataView = New DataView(dt)
Return dv
End Function
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Load sample data only once, when the page is first loaded.
If Not IsPostBack Then
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub
Sub Check_Change(ByVal sender As Object, ByVal e As EventArgs)
' Allow or prevent paging depending on the user's selection.
ItemsGrid.AllowPaging = AllowPagingCheckBox.Checked()
' Rebind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End Sub
Sub Grid_Change(ByVal sender As Object, ByVal e As DataGridPageChangedEventArgs)
' For the DataGrid control to navigate to the correct page when
' paging is allowed, the CurrentPageIndex property must be updated
' programmatically. This process is usually accomplished in the
' event-handling method for the PageIndexChanged event.
' Set CurrentPageIndex to the page the user clicked.
ItemsGrid.CurrentPageIndex = e.NewPageIndex
' Rebind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>DataGrid AllowPaging Example</h3>
<p>Select whether to allow paging in the DataGrid control.<br />
<asp:CheckBox id="AllowPagingCheckBox"
Text="Allow paging"
AutoPostBack="True"
Checked="True"
OnCheckedChanged="Check_Change"
runat="server" />
</p>
<hr />
<asp:Label ID="Label1" runat="server"
AssociatedControlID="ItemsGrid"
Font-Bold="true">Product List</asp:Label>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="Gray"
BorderWidth="1"
CellPadding="3"
UseAccessibleHeader="true"
AutoGenerateColumns="False"
PageSize="10"
AllowPaging="True"
OnPageIndexChanged="Grid_Change">
<HeaderStyle BackColor="LightBlue" />
<Columns>
<asp:BoundColumn DataField="IntegerValue"
SortExpression="IntegerValue"
ItemStyle-HorizontalAlign="center"
HeaderText="Item" />
<asp:BoundColumn DataField="StringValue"
HeaderText="Description"
ItemStyle-HorizontalAlign="left"
SortExpression="StringValue" />
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
SortExpression="CurrencyValue"
DataFormatString="{0:c}" />
</Columns>
<ItemStyle HorizontalAlign="Right" />
</asp:DataGrid>
</div>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<script runat="server">
ICollection CreateDataSource()
{
// Create sample data for the DataGrid control.
DataTable dt = new DataTable();
DataRow dr;
// Define the columns of the table.
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(String)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(Double)));
// Populate the table with sample values.
for (int i=0; i<=100; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
// Load sample data only once, when the page is first loaded.
if (!IsPostBack)
{
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
// Manually register the event-handling method for the PageIndexChanged
// event of the DataGrid control.
ItemsGrid.PageIndexChanged += new DataGridPageChangedEventHandler(this.Grid_Change);
}
void Check_Change(Object sender, EventArgs e)
{
// Allow or prevent paging depending on the user's selection.
if (AllowPagingCheckBox.Checked)
{
ItemsGrid.AllowPaging = true;
}
else
{
ItemsGrid.AllowPaging = false;
}
// Re-bind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
void Grid_Change(Object sender, DataGridPageChangedEventArgs e)
{
// For the DataGrid control to navigate to the correct page when paging is
// allowed, the CurrentPageIndex property must be programmatically updated.
// This process is usually accomplished in the event-handling method for the
// PageIndexChanged event.
// Set CurrentPageIndex to the page the user clicked.
ItemsGrid.CurrentPageIndex = e.NewPageIndex;
// Re-bind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
</script>
<head runat="server">
<title>DataGrid PageIndexChanged Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid PageIndexChanged Example</h3>
Select whether to allow paging in the DataGrid control.
<br /><br />
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="False"
PageSize="10"
AllowPaging="True"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<Columns>
<asp:BoundColumn DataField="IntegerValue"
SortExpression="IntegerValue"
HeaderText="Item"/>
<asp:BoundColumn DataField="StringValue"
SortExpression="StringValue"
HeaderText="Description"/>
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
SortExpression="CurrencyValue"
DataFormatString="{0:c}">
<ItemStyle HorizontalAlign="Right">
</ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
<hr />
<table cellpadding="5">
<tr>
<td>
<asp:CheckBox id="AllowPagingCheckBox"
Text="Allow paging"
AutoPostBack="True"
Checked="True"
OnCheckedChanged="Check_Change"
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<script runat="server">
Function CreateDataSource() As ICollection
' Create sample data for the DataGrid control.
Dim dt As DataTable = New DataTable()
Dim dr As DataRow
' Define the columns of the table.
dt.Columns.Add(new DataColumn("IntegerValue", GetType(Int32)))
dt.Columns.Add(new DataColumn("StringValue", GetType(String)))
dt.Columns.Add(new DataColumn("CurrencyValue", GetType(Double)))
' Populate the table with sample values.
Dim i As Integer
For i=0 To 100
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = 1.23 * (i + 1)
dt.Rows.Add(dr)
Next i
Dim dv As DataView = New DataView(dt)
Return dv
End Function
Sub Page_Load(sender As Object, e As EventArgs)
' Load sample data only once, when the page is first loaded.
If Not IsPostBack Then
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
' Manually register the event-handling method for the PageIndexChanged
' event of the DataGrid control.
AddHandler ItemsGrid.PageIndexChanged, AddressOf Grid_Change
End Sub
Sub Check_Change(sender As Object, e As EventArgs)
' Allow or prevent paging depending on the user's selection.
If AllowPagingCheckBox.Checked Then
ItemsGrid.AllowPaging = True
Else
ItemsGrid.AllowPaging = False
End If
' Re-bind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End Sub
Sub Grid_Change(sender As Object, e As DataGridPageChangedEventArgs)
' For the DataGrid control to navigate to the correct page when paging is
' allowed, the CurrentPageIndex property must be programmatically updated.
' This process is usually accomplished in the event-handling method for the
' PageIndexChanged event.
' Set CurrentPageIndex to the page the user clicked.
ItemsGrid.CurrentPageIndex = e.NewPageIndex
' Re-bind the data to refresh the DataGrid control.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End Sub
</script>
<head runat="server">
<title>DataGrid PageIndexChanged Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid PageIndexChanged Example</h3>
Select whether to allow paging in the DataGrid control.
<br /><br />
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="False"
PageSize="10"
AllowPaging="True"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<Columns>
<asp:BoundColumn DataField="IntegerValue"
SortExpression="IntegerValue"
HeaderText="Item"/>
<asp:BoundColumn DataField="StringValue"
SortExpression="StringValue"
HeaderText="Description"/>
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
SortExpression="CurrencyValue"
DataFormatString="{0:c}">
<ItemStyle HorizontalAlign="Right">
</ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
<hr />
<table cellpadding="5">
<tr>
<td>
<asp:CheckBox id="AllowPagingCheckBox"
Text="Allow paging"
AutoPostBack="True"
Checked="True"
OnCheckedChanged="Check_Change"
runat="server"/>
</td>
</tr>
</table>
</form>
</body>
</html>
Remarks
The PageIndexChanged event is raised when a button in the page selection element of the DataGrid control is clicked.
For a list of initial property values for an instance of DataGridPageChangedEventArgs, see the DataGridPageChangedEventArgs constructor.
For more information about handling events, see Handling and Raising Events.
Constructors
| DataGridPageChangedEventArgs(Object, Int32) |
Initializes a new instance of the DataGridPageChangedEventArgs class. |
Properties
| CommandSource |
Gets the source of the command. |
| NewPageIndex |
Gets the index of the page selected by the user in the page selection element of the DataGrid control. |
Methods
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Applies to
See also
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