DataGridPageChangedEventHandler Temsilci
Tanım
Önemli
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Denetimin olayını DataGrid işleyen PageIndexChanged yöntemi temsil eder.
public delegate void DataGridPageChangedEventHandler(System::Object ^ source, DataGridPageChangedEventArgs ^ e);public delegate void DataGridPageChangedEventHandler(object source, DataGridPageChangedEventArgs e);type DataGridPageChangedEventHandler = delegate of obj * DataGridPageChangedEventArgs -> unitPublic Delegate Sub DataGridPageChangedEventHandler(source As Object, e As DataGridPageChangedEventArgs)Parametreler
- source
- Object
Olayın kaynağı.
DataGridPageChangedEventArgs Olay verilerini içeren bir.
Örnekler
Aşağıdaki kod örneği, olay için bir işleyicinin nasıl belirtileceğini ve kodleneceğini PageIndexChanged gösterir. Denetimdeki DataGrid sayfaları 10 öğelik artışlarla görüntüler.
<%@ 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>
Açıklamalar
Denetimin PageIndexChanged sayfa seçimi öğesindeki DataGrid bir düğmeye tıklandığında olay tetikler.
Bir DataGridPageChangedEventHandler temsilci oluşturduğunuzda, olayı işleyecek yöntemi tanımlarsınız. Olayı olay işleyicinizle ilişkilendirmek için olaya temsilcinin bir örneğini ekleyin. Olay her gerçekleştiğinde, olay işleyici (siz temsilciyi kaldırmadığınız sürece) çağrılır. Olay işleyici temsilcileri hakkında daha fazla bilgi için bkz. Olayları İşleme ve Oluşturma.
Uzantı Metotları
| GetMethodInfo(Delegate) |
Belirtilen temsilci tarafından temsil edilen yöntemi temsil eden bir nesnesi alır. |
Şunlara uygulanır
Ayrıca bkz.
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