GridView.TopPagerRow Property
Gets a GridViewRow object that represents the top pager row in a GridView control.
Assembly: System.Web (in System.Web.dll)
<BrowsableAttribute(False)> Public Overridable ReadOnly Property TopPagerRow As GridViewRow
Property Value
Type: System.Web.UI.WebControls.GridViewRowA GridViewRow that represents the top pager row in the control.
When paging is enabled (by setting the AllowPaging property to true), an additional row called the pager row is automatically displayed in the GridView control. The pager row contains controls that allow the user to navigate to the other pages and can be displayed at the top, the bottom, or both the top and bottom of the control. Use the TopPagerRow property to programmatically access the GridViewRow object that represents the top pager row in a GridView control.
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The TopPagerRow property is available only after the GridView control creates the top pager row in the RowCreated event. |
This property is commonly used when you need to programmatically manipulate the top pager row, for example when adding custom content. Any modification to the TopPagerRow property must be performed after the GridView control has been rendered; otherwise, the GridView control will overwrite any changes.
The following example demonstrates how to use the TopPagerRow property to access the top pager row in a GridView control. The TopPagerRow property is used to retrieve a DropDownList control from the pager row.
<%@ 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 PageDropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) ' Retrieve the pager row. Dim pagerRow As GridViewRow = CustomersGridView.TopPagerRow ' Retrieve the PageDropDownList DropDownList from the bottom pager row. Dim pageList As DropDownList = CType(pagerRow.Cells(0).FindControl("PageDropDownList"), DropDownList) ' Set the PageIndex property to display that page selected by the user. CustomersGridView.PageIndex = pageList.SelectedIndex End Sub Sub CustomersGridView_DataBound(ByVal sender As Object, ByVal e As EventArgs) ' Get the PagerRow. Dim pagerRow As GridViewRow = CustomersGridView.TopPagerRow ' Retrieve the DropDownList and Label controls from the row. Dim pageList As DropDownList = CType(pagerRow.Cells(0).FindControl("PageDropDownList"), DropDownList) Dim pageLabel As Label = CType(pagerRow.Cells(0).FindControl("CurrentPageLabel"), Label) If Not pageList Is Nothing Then ' Create the values for the DropDownList control based on ' the total number of pages required to display the data ' source. Dim i As Integer For i = 0 To CustomersGridView.PageCount - 1 ' Create a ListItem object to represent a page. Dim pageNumber As Integer = i + 1 Dim item As ListItem = New ListItem(pageNumber.ToString()) ' If the ListItem object matches the currently selected ' page, flag the ListItem object as being selected. Because ' the DropDownList control is recreated each time the pager ' row gets created, this will persist the selected item in ' the DropDownList control. If i = CustomersGridView.PageIndex Then item.Selected = True End If ' Add the ListItem object to the Items collection of the ' DropDownList. pageList.Items.Add(item) Next i End If If Not pageLabel Is Nothing Then ' Calculate the current page number. Dim currentPage As Integer = CustomersGridView.PageIndex + 1 ' Update the Label control with the current page information. pageLabel.Text = "Page " & currentPage.ToString() & _ " of " & CustomersGridView.PageCount.ToString() End If End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>GridView TopPagerRow Example</title> </head> <body> <form id="form1" runat="server"> <h3>GridView TopPagerRow Example</h3> <asp:gridview id="CustomersGridView" datasourceid="CustomersSqlDataSource" autogeneratecolumns="true" allowpaging="true" ondatabound="CustomersGridView_DataBound" runat="server"> <pagerstyle forecolor="Blue" backcolor="LightBlue"/> <pagersettings position="Top"/> <pagertemplate> <table width="100%"> <tr> <td style="width:70%"> <asp:label id="MessageLabel" forecolor="Blue" text="Select a page:" runat="server"/> <asp:dropdownlist id="PageDropDownList" autopostback="true" onselectedindexchanged="PageDropDownList_SelectedIndexChanged" runat="server"/> </td> <td style="width:70%" align="right"> <asp:label id="CurrentPageLabel" forecolor="Blue" runat="server"/> </td> </tr> </table> </pagertemplate> </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="CustomersSqlDataSource" selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"> </asp:sqldatasource> </form> </body> </html>
Available since 2.0
