<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Data" %>
<Script Runat="Server">
Dim conNorthwind As SqlConnection
Dim strSql As String
Dim strSelect As String
Dim intStartIndex As Integer
Dim intEndIndex As Integer
Dim intRecordCount As Integer
Dim cmdSql As SqlCommand
Sub Page_Load
btnFirst.Text = "首页"
btnPrev.Text = "上一页"
btnNext.Text = "下一页"
btnLast.Text = "末页"
conNorthwind = New SqlConnection( "Server=192.168.4.1;UID=sa;PWD=111111;Database=yourDBname" )
If Not IsPostBack Then
BindDataGrid
End If
End Sub
Sub BindDataGrid
Dim cmdSelect As SqlCommand
Dim dtrRecordCount As SqlDataReader
intEndIndex = dgrdProducts.PageSize
cmdSelect = New SqlCommand( "newsPaged", conNorthwind )
cmdSelect.CommandType = CommandType.StoredProcedure
cmdSelect.Parameters.Add( "@PageIndex", intStartIndex )
cmdSelect.Parameters.Add( "@PageSize ", intEndIndex )
conNorthwind.Open()
dtrRecordCount = cmdSelect.ExecuteReader()
While dtrRecordCount.read()
intRecordCount=dtrRecordCount(0)
End While
dgrdProducts.VirtualItemCount = (intRecordCount / dgrdProducts.PageSize)
dtrRecordCount.NextResult()
dgrdProducts.DataSource = dtrRecordCount
dgrdProducts.DataBind()
conNorthwind.Close()
End Sub
Sub dgrdProducts_PageIndexChanged( s As Object, e As DataGridPageChangedEventArgs )
intStartIndex = e.NewPageIndex
dgrdProducts.CurrentPageIndex = e.NewPageIndex
BindDataGrid
End Sub
Sub PagerButtonClick(ByVal sender As Object, ByVal e As EventArgs)
Dim arg As String = sender.CommandArgument
Select Case arg
Case "next"
If (dgrdProducts.CurrentPageIndex < (dgrdProducts.PageCount - 1)) Then
dgrdProducts.CurrentPageIndex += 1
End If
Case "prev"
If (dgrdProducts.CurrentPageIndex > 0) Then
dgrdProducts.CurrentPageIndex -= 1
End If
Case "last"
dgrdProducts.CurrentPageIndex = (dgrdProducts.PageCount - 1)
Case Else
'page number
dgrdProducts.CurrentPageIndex = System.Convert.ToInt32(arg)
End Select
intStartIndex=dgrdProducts.CurrentPageIndex
BindDataGrid
End Sub
Sub dgrdProducts_EditCommand( s As Object, e As DataGridCommandEventArgs )
dgrdProducts.EditItemIndex = e.Item.ItemIndex
intStartIndex = dgrdProducts.CurrentPageIndex
BindDataGrid
End Sub
Sub dgrdProducts_UpdateCommand( s As Object, e As DataGridCommandEventArgs )
Dim intArticleID As Integer
Dim txtTopic As TextBox
Dim txtEditor As TextBox
Dim strTopic As String
Dim strEditor As String
intArticleID = dgrdProducts.DataKeys( e.Item.ItemIndex )
txtTopic = e.Item.Cells( 1 ).Controls( 0 )
txtEditor = e.Item.Cells( 2 ).Controls( 0 )
strTopic = txtTopic.Text
strEditor = txtEditor.Text
strSql = "Update Tb_Article Set Topic=@Topic, " _
& "Editor=@Editor Where ArticleID=@ArticleID"
cmdSql = New SqlCommand( strSql, conNorthwind )
cmdSql.Parameters.Add( "@Topic", strTopic )
cmdSql.Parameters.Add( "@Editor", strEditor )
cmdSql.Parameters.Add( "@ArticleID", intArticleID )
conNorthwind.Open()
cmdSql.ExecuteNonQuery()
conNorthwind.Close()
dgrdProducts.EditItemIndex = -1
BindDataGrid
End Sub
Sub dgrdProducts_CancelCommand( s As Object, e As DataGridCommandEventArgs )
dgrdProducts.EditItemIndex = -1
BindDataGrid
End Sub
</Script>
<html>
<head><title>DataGridCustomPaging.aspx</title></head>
<body>
<form Runat="Server">
<asp:DataGrid Runat="Server"
ID="dgrdProducts"
OnEditCommand="dgrdProducts_EditCommand"
OnUpdateCommand="dgrdProducts_UpdateCommand"
OnCancelCommand="dgrdProducts_CancelCommand"
DataKeyField="A_ArticleID"
AutoGenerateColumns="false"
showheader="true"
AllowPaging="True"
AllowCustomPaging="True"
HeaderStyle-BackColor="Salmon"
PageSize="10"
OnPageIndexChanged="dgrdProducts_PageIndexChanged"
PagerStyle-Mode="NumericPages"
AlternatingItemStyle-BackColor="#eeaaee"
Font-Size="10pt"
Font-Name="Verdana"
CellSpacing="0"
CellPadding="3"
GridLines="Both"
BorderWidth="1"
BorderColor="black"
PagerStyle-HorizontalAlign="Right">
<AlternatingItemStyle BackColor="#EEEEEE"></AlternatingItemStyle>
<Columns>
<asp:BoundColumn
HeaderText="序列号"
DataField="ArticleID"
ReadOnly="True" />
<asp:BoundColumn
HeaderText="标题"
DataField="Topic" />
<asp:BoundColumn
HeaderText="编辑者"
DataField="Editor" />
<asp:EditCommandColumn
EditText="Edit!"
UpdateText="Update!"
CancelText="Cancel!" />
<asp:HyperLinkColumn
HeaderText="编辑"
DataNavigateUrlField="ArticleID"
DataNavigateUrlFormatString="Details.aspx?id={0}"
Text="编辑"/>
</columns>
</asp:datagrid>
<asp:linkbutton id="btnFirst" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="0"></asp:linkbutton>
<asp:linkbutton id="btnPrev" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="prev"></asp:linkbutton>
<asp:linkbutton id="btnNext" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="next"></asp:linkbutton>
<asp:linkbutton id="btnLast" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="last"></asp:linkbutton>
</form>
</html>
下面是存储过程：
CREATE PROCEDURE newsPaged
(
@PageIndex int,
@PageSize int
)
AS
BEGIN
DECLARE @PageLowerBound int
DECLARE @PageUpperBound int
DECLARE @RowsToReturn int
-- First set the rowcount
SET @RowsToReturn = @PageSize * (@PageIndex + 1)
SET ROWCOUNT @RowsToReturn
-- Set the page bounds
SET @PageLowerBound = @PageSize * @PageIndex
SET @PageUpperBound = @PageLowerBound + @PageSize + 1
-- Create a temp table to store the select results
CREATE TABLE #PageIndex
(
IndexId int IDENTITY (1, 1) NOT NULL,
ArticleID int,
)
-- Insert into the temp table
INSERT INTO #PageIndex (ArticleID)
SELECT
ArticleID
FROM
tablename
ORDER BY
ArticleID DESC
-- Return total count
SELECT COUNT(ArticleID) FROM tablename
-- Return paged results
SELECT
O.ArticleID,O.Topic,Editor
FROM
tablename O,
#PageIndex PageIndex
WHERE
O.ArticleID = PageIndex.ArticleID AND
PageIndex.IndexID > @PageLowerBound AND
PageIndex.IndexID < @PageUpperBound
ORDER BY
PageIndex.IndexID
END
GO
