datagrid分页问题(前后跳页)《控件版》
在CSDN上看了很多的DATAGRID分頁問題,當然DATAGRID有自己的分頁項,功能是很有限的,我也在CSDN上看了很多自己分頁的代碼,發現都是用C#寫的,我寫了一個用ASP。NET中VB語言寫的。以下代碼供大家參考。
HTML代碼:
<%@ Control Language="vb" AutoEventWireup="false" Codebehind="DataGridPage.ascx.vb" Inherits="datagridfenye.DataGridPage" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<LINK href="../css/style.css" type="text/css" rel="stylesheet">
<FONT face="MS UI Gothic"></FONT>
<asp:panel id="divPanel" ForeColor="Blue" CssClass="font2" HorizontalAlign="Left" Width="84.16%"
?runat="server" Visible="True">
<asp:Button id="btnNavFirst" runat="server" BorderStyle="Ridge" Text="初頁" CommandName="FIRST"
??BorderWidth="1px" CausesValidation="False" BackColor="#E0E0E0" Font-Size="XX-Small"></asp:Button>
<asp:Button id="btnNavPrevious" runat="server" BorderStyle="Ridge" Text="前頁" CommandName="PREVIOUS"
??BorderWidth="1px" CausesValidation="False" BackColor="#E0E0E0" Font-Size="XX-Small"></asp:Button>
<asp:Button id="btnNavNext" runat="server" BorderStyle="Ridge" Text="次頁" CommandName="NEXT"
??BorderWidth="1px" CausesValidation="False" BackColor="#E0E0E0" Font-Size="XX-Small"></asp:Button>
<asp:Button id="btnNavLast" runat="server" BorderStyle="Ridge" Text="末頁" CommandName="LAST"
??BorderWidth="1px" CausesValidation="False" BackColor="#E0E0E0" Font-Size="XX-Small"></asp:Button><INPUT id="hdRowCount" style="WIDTH: 43px; HEIGHT: 22px" type="hidden" size="1" name="Hidden1"
??runat="server"> <INPUT id="hdCurrentIndex" style="WIDTH: 48px; HEIGHT: 22px" type="hidden" size="2" value="0"
??name="Hidden1" runat="server">
<asp:Label id="LabelMsg" ForeColor="Blue" Width="232px" runat="server"></asp:Label>GOTO
<asp:TextBox id="tbPage" Width="31px" runat="server"></asp:TextBox>
<asp:Label id="LabelMsg2" ForeColor="Blue" runat="server">頁</asp:Label>
<asp:Button id="btnNavGo" runat="server" BorderStyle="Ridge" Text="確定" CommandName="GO" BorderWidth="1px"
??CausesValidation="False" BackColor="#E0E0E0" Font-Size="XX-Small"></asp:Button></asp:panel>
<%@ Control Language="vb" AutoEventWireup="false" Codebehind="DataGridPage.ascx.vb" Inherits="datagridfenye.DataGridPage" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
WEB代碼:
Imports System
Imports System.Data
Imports System.Drawing
Imports System.Text
Imports System.Web
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls
Public Delegate Sub BindDataDelegate()
Public Class DataGridPage
??? Inherits System.Web.UI.UserControl
#Region " Web フォーム デザイナで生成されたコード "
??? 'この呼び出しは Web フォーム デザイナで必要です。
??? <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
??? End Sub
??? Public binddata1 As BindDataDelegate
??? Private _dg As DataGrid
??? Private _autohidden As Boolean = True
??? Private _pagesize As Integer = 10
??? Private _itemcount As Integer = 0
??? Private _dispStyle As Integer = 1
??? Protected WithEvents LabelMsg As System.Web.UI.WebControls.Label
??? Protected WithEvents btnNavFirst As System.Web.UI.WebControls.Button
??? Protected WithEvents btnNavPrevious As System.Web.UI.WebControls.Button
??? Protected WithEvents btnNavNext As System.Web.UI.WebControls.Button
??? Protected WithEvents btnNavLast As System.Web.UI.WebControls.Button
??? Protected WithEvents tbPage As System.Web.UI.WebControls.TextBox
??? Protected WithEvents LabelMsg2 As System.Web.UI.WebControls.Label
??? Protected WithEvents btnNavGo As System.Web.UI.WebControls.Button
??? Protected WithEvents divPanel As System.Web.UI.WebControls.Panel
??? Protected WithEvents hdRowCount As System.Web.UI.HtmlControls.HtmlInputHidden
??? Protected WithEvents hdCurrentIndex As System.Web.UI.HtmlControls.HtmlInputHidden
??? 'メモ : 次のプレースホルダ宣言は Web フォーム デザイナで必要です。
??? '削除および移動しないでください。
??? Private designerPlaceholderDeclaration As System.Object
??? Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
??????? ' CODEGEN: このメソッド呼び出しは Web フォーム デザイナで必要です。
??????? ' コード エディタを使って変更しないでください。
??????? InitializeComponent()
??????? AddHandler Me.Load, AddressOf Page_Load
??? End Sub
#End Region
??? Public Property Target() As DataGrid
??????? Get
??????????? Return _dg
??????? End Get
??????? Set(ByVal Value As DataGrid)
??????????? _dg = Value
??????? End Set
??? End Property
??? Public Property AutoHidden() As Boolean
??????? Get
??????????? Return _autohidden
??????? End Get
??????? Set(ByVal Value As Boolean)
??????????? _autohidden = Value
??????? End Set
??? End Property
??? Public Property PageSize() As Integer
??????? Get
??????????? Return _pagesize
??????? End Get
??????? Set(ByVal Value As Integer)
??????????? _pagesize = Value
??????? End Set
??? End Property
??? Public Property ItemCount() As Integer
??????? Get
??????????? Return _itemcount
??????? End Get
??????? Set(ByVal Value As Integer)
??????????? _itemcount = Value
??????? End Set
??? End Property
??? Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
??????? ' ページを初期化するユーザー コードをここに挿入します。
??? End Sub
??? Public Sub SetTarget(ByVal adg As DataGrid, ByRef aBindData1 As BindDataDelegate)
??????? _dg = adg
??????? binddata1 = aBindData1
??????? AddHandler btnNavFirst.Click, AddressOf NavigationButtonClick
??????? AddHandler btnNavPrevious.Click, AddressOf NavigationButtonClick
??????? AddHandler btnNavNext.Click, AddressOf NavigationButtonClick
??????? AddHandler btnNavLast.Click, AddressOf NavigationButtonClick
??????? AddHandler btnNavGo.Click, AddressOf NavigationButtonClick
??????? AddHandler _dg.DataBinding, AddressOf zxDataBinding
??????? binddata1()
??? End Sub
??? Public Sub SetStyle(ByVal aPageSize As Integer, ByVal aAutoHidden As Boolean, ByVal aDispStyle As Integer)
??????? _pagesize = aPageSize
??????? _autohidden = aAutoHidden
??????? _dispStyle = aDispStyle
??????? divPanel.Visible = Not aAutoHidden
??? End Sub
??? Public Sub SetStyle(ByVal aPageSize As Integer, ByVal aAutoHidden As Boolean)
??????? SetStyle(aPageSize, aAutoHidden, 1)
??? End Sub
??? Public Sub SetStyle(ByVal aPageSize As Integer)
??????? SetStyle(aPageSize, True)
??? End Sub
??? Public Sub NavigationButtonClick(ByVal sender As Object, ByVal e As System.EventArgs)
??????? Dim direction As String
??????? direction = sender.CommandName
??????? Select Case (direction.ToUpper())
??????????? Case ("FIRST")
??????????????? _dg.CurrentPageIndex = 0
??????????? Case ("PREVIOUS")
??????????????? _dg.CurrentPageIndex = Math.Max(_dg.CurrentPageIndex - 1, 0)
??????????? Case ("NEXT")
??????????????? _dg.CurrentPageIndex = Math.Min(_dg.CurrentPageIndex + 1, _dg.PageCount - 1)
??????????? Case ("LAST")
??????????????? _dg.CurrentPageIndex = Math.Max(_dg.PageCount - 1, 0)
??????????? Case ("GO")
??????????????? Try
??????????????????? _dg.CurrentPageIndex = Math.Min(_dg.PageCount - 1, CInt(tbPage.Text) - 1)
??????????????????? tbPage.Text = ""
??????????????? Catch
??????????????????? tbPage.Text = ""
??????????????? End Try
??????? End Select
??????? binddata1()
??? End Sub
??? Public Sub zxDataBinding(ByVal sender As Object, ByVal e As System.EventArgs)
??????? Dim newCount As Integer = 0
??????? Dim PageCount As Integer = 0
??????? If (_dg.DataSource Is "null") Then
??????????? SetButtonState(0)
??????????? Exit Sub
??????? End If
??????? If (_dg.DataSource.GetType().ToString().ToLower() = "system.data.datatable") Then
??????????? newCount = _dg.DataSource.Rows.Count
??????? ElseIf (_dg.DataSource.GetType().ToString().ToLower() = "system.data.dataview") Then
??????????? newCount = _dg.DataSource.Count
??????? ElseIf (_dg.DataSource.GetType().ToString().ToLower() = "system.data.dataset") Then
??????????? newCount = _dg.DataSource.Tables(0).Rows.Count
??????? End If
??????? If (newCount > 0) Then
??????????? PageCount = CInt((newCount - 1) / _pagesize)
??????????? If (_dg.CurrentPageIndex > PageCount - 1) Then
??????????????? _dg.CurrentPageIndex = PageCount - 1
??????????? End If
??????? Else
??????????? PageCount = 0
??????????? _dg.CurrentPageIndex = 0
??????? End If
??????? Select Case (_dispStyle)
??????????? Case 1
??????????????? LabelMsg.Text = "共" + PageCount.ToString() + "頁 第" + (_dg.CurrentPageIndex + 1).ToString() + "頁"
??????????????? LabelMsg.Text += " 總記?數:" + newCount.ToString() + ""
??????????? Case 2
??????????????? LabelMsg.Text = (_dg.CurrentPageIndex + 1).ToString() + "/" + PageCount.ToString() + "頁"
??????????????? LabelMsg.Text += " 總數:" + newCount.ToString()
??????? End Select
??????? If (_autohidden) Then
??????????? divPanel.Visible = ((newCount - 1) / _pagesize > 0)
??????? Else
??????????? divPanel.Visible = True
??????? End If
??????? SetButtonState(PageCount)
??? End Sub
??? Public Sub SetButtonState(ByVal _PageCount As Integer)
??????? btnNavFirst.Enabled = (_dg.CurrentPageIndex > 0)
??????? btnNavPrevious.Enabled = (_dg.CurrentPageIndex > 0)
??????? btnNavNext.Enabled = (_dg.CurrentPageIndex < _PageCount - 1)
??????? btnNavLast.Enabled = (_dg.CurrentPageIndex < _PageCount - 1)
??? End Sub
End Class
總結
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