购物车.aspx.vb

asp,vb.net编写,我的毕业设计,简单的网上购书系统,比较主流

Public Class 购物车
    Inherits System.Web.UI.Page

#Region " Web 窗体设计器生成的代码 "

    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents T2 As System.Web.UI.HtmlControls.HtmlTable
    Protected WithEvents Dggwc As System.Web.UI.WebControls.DataGrid
    Protected WithEvents LinkButton2 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton1 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid

    '注意: 以下占位符声明是 Web 窗体设计器所必需的。
    '不要删除或移动它。
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub

#End Region
    Dim myd As New main
    Dim gwc As New DataTable
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Session("gwc") Is Nothing Then
            Dim mycol As New DataColumn
            gwc.Columns.Add("ID", Type.GetType("System.Intl6"))
            gwc.Columns.Add("书名", Type.GetType("System.String"))
            gwc.Columns.Add("作者", Type.GetType("System.String"))
            gwc.Columns.Add("报价", Type.GetType("System.Decimal"))
            Session("gwc") = gwc
        Else
            gwc = Session("gwc")
        End If
        If Not IsPostBack Then
            Dim sqlstr As String
            sqlstr = "select * from 书籍表"
            DataGrid1.DataSource = myd.redataset(sqlstr)
            DataGrid1.DataBind()
        End If
    End Sub

    Private Sub DataGrid1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DataGrid1.SelectedIndexChanged
        gwc = Session("gwc")
        Dim myr As DataRow
        myr = gwc.NewRow

        myr("ID") = DataGrid1.SelectedItem.Cells(0).Text
        myr("书名") = DataGrid1.SelectedItem.Cells(1).Text
        myr("作者") = DataGrid1.SelectedItem.Cells(3).Text
        myr("报价") = DataGrid1.SelectedItem.Cells(8).Text

        gwc.Rows.Add(myr)

        Session("gwc") = gwc
    End Sub

    Private Sub LinkButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Dggwc.DataSource = Session("gwc")
        Dggwc.DataBind()

        Dim i As Integer
        Dim sum As Decimal
        For i = 0 To Dggwc.Items.Count - 1
            sum = sum = Dggwc.Items.Item(i).Cells(3).Text
        Next
        T2.Rows(3).Cells(0).InnerHtml = "您总共选购了:" & Dggwc.Items.Count & "件,总金额为:" & sum
    End Sub



    Private Sub Dggwc_DeleteCommand(ByVal source As System.Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs)
        Dim index As Integer = e.Item.ItemIndex
        Dim mr As DataRow
        mr = Session("gwc").Rows(index)
        Session("gwc").Rows.Remove(mr)
        Dggwc.DataSource = Session("gwc")
        Dggwc.DataBind()
        If Session("gwc").rows.count = 0 Then
            Session.Remove("gwc")
            T2.Rows(2).Cells(0).InnerHtml = ""
            Exit Sub
        End If
        Dim i As Integer
        Dim sum As Decimal
        For i = 0 To Dggwc.Items.Count - 1
            sum = sum + Dggwc.Items.Item(i).Cells(3).Text
        Next
        T2.Rows(3).Cells(0).InnerHtml = "您总共选购了:" & Dggwc.Items.Count & "件,总金额为:" & sum
    End Sub
    Sub datab(ByVal str As String)
        DataGrid1.DataSource = myd.retab(str)
        DataGrid1.DataBind()
    End Sub

    Private Sub Dggwc_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Dggwc.SelectedIndexChanged
        'Dggwc.CurrentPageIndex = e.NewPageIndex
        'Dim sqlstr As String
        'sqlstr = "select * from 商品表"
        'Dggwc.DataSource = myd.ReDataSet(sqlstr)
        'Dggwc.DataBind()
    End Sub

    Private Sub DataGrid1_PageIndexChanged(ByVal source As System.Object, ByVal e As System.Web.UI.WebControls.DataGridPageChangedEventArgs)
        DataGrid1.CurrentPageIndex = e.NewPageIndex
        datab("select * from 书籍表")
    End Sub
End Class