lookback.aspx.vb

这是用ASP.NET和SQLserver编写的购物网站的程序

Imports System.Data.SqlClient
Imports System.Data
Public Class lookback
    Inherits System.Web.UI.Page
    Dim into As String = ConfigurationSettings.AppSettings("ConnectionString")
    Dim com As New SqlCommand
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label
    Protected WithEvents ImageButton1 As System.Web.UI.WebControls.ImageButton
    Protected WithEvents HyperLink6 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink5 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink4 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink3 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink1 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink2 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Hyperlink11 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Label2 As System.Web.UI.WebControls.Label
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents HyperLink7 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Hyperlink8 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Hyperlink9 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Hyperlink10 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Label3 As System.Web.UI.WebControls.Label
    Protected WithEvents DataGrid2 As System.Web.UI.WebControls.DataGrid
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
    Dim con As SqlConnection = New SqlConnection(into)
#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

    '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

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此处放置初始化页的用户代码
        If Not IsPostBack() Then
            Try
                If (Session("userpower") <> 1) Then
                    Response.End()
                End If
            Catch ex As Exception
                Response.Write("您还没有登录,请登录后再操作,<a href='login.aspx'>登录</a>")
                Response.End()
            End Try
            Label2.Text = "欢迎" & Session("username")
            Label2.Visible = True
            Button1.Visible = True
            con.Open()
            com.CommandText = "select orderid 订单号,orderdate 订单日期,totalprice 总价,status 已发货 from orders where userid='" & Session("username") & "'"
            com.Connection = con
            Dim da As New SqlClient.SqlDataAdapter(com.CommandText, con)
            Dim ds As New DataSet
            da.Fill(ds)
            DataGrid1.DataSource = ds
            DataGrid1.DataBind()
            con.Close()
        End If

    End Sub

    Private Sub DataGrid1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub DataGrid2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub DataGrid1_DeleteCommand(ByVal source As System.Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs)
       
    End Sub

    Private Sub DataGrid1_PageIndexChanged(ByVal source As System.Object, ByVal e As System.Web.UI.WebControls.DataGridPageChangedEventArgs)
        DataGrid1.CurrentPageIndex = e.NewPageIndex
        con.Open()
        com.CommandText = "select orderid 订单号,orderdate 订单日期,totalprice 总价,status 已发货 from orders where userid='" & Session("username") & "'"
        com.Connection = con
        Dim da As New SqlClient.SqlDataAdapter(com.CommandText, con)
        Dim ds As New DataSet
        da.Fill(ds)
        DataGrid1.DataSource = ds
        DataGrid1.DataBind()
        con.Close()
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Session("userpower") = -1
        Session("username") = ""
        Label2.Visible = False
        Button1.Visible = False
        Response.Redirect("webform1.aspx")
    End Sub

    Private Sub ImageButton1_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ImageButton1.Click
        Response.Redirect("webform1.aspx")
    End Sub

    Private Sub DataGrid1_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.ItemCommand
        con.Open()
        Dim i As Int16 = CInt(DataGrid1.DataKeys(e.Item.ItemIndex))
        com.CommandText = "select itemname 商品名,quentity 数量,untiprice 单价,totalprice 总价 from lineitem,item where item.itemid=lineitem.itemid and orderid=" & i
        com.Connection = con
        Dim da As New SqlClient.SqlDataAdapter(com.CommandText, con)
        Dim ds As New DataSet
        da.Fill(ds)
        DataGrid2.DataSource = ds
        DataGrid2.DataBind()
        DataGrid2.Visible = True
        con.Close()
    End Sub
End Class