line.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 line
    Inherits System.Web.UI.Page
    Dim into As String = ConfigurationSettings.AppSettings("ConnectionString")
    Dim com As New SqlCommand
    Dim com1 As New SqlCommand
    Dim con1 As SqlConnection = New SqlConnection(into)
    Dim com2 As New SqlCommand
    Dim con2 As SqlConnection = New SqlConnection(into)
    Protected WithEvents TextBox6 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label6 As System.Web.UI.WebControls.Label
    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
    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 Label1 As System.Web.UI.WebControls.Label
    Protected WithEvents Button2 As System.Web.UI.WebControls.Button
    Protected WithEvents Label5 As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox5 As System.Web.UI.WebControls.TextBox
    Protected WithEvents TextBox4 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label4 As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox3 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label7 As System.Web.UI.WebControls.Label
    Protected WithEvents Label3 As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox2 As System.Web.UI.WebControls.TextBox
    Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label8 As System.Web.UI.WebControls.Label
    Protected WithEvents RegularExpressionValidator1 As System.Web.UI.WebControls.RegularExpressionValidator
    Protected WithEvents RegularExpressionValidator2 As System.Web.UI.WebControls.RegularExpressionValidator

    '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
        con.Open()
        If Not IsPostBack() Then
            Try
                If Session("userpower") <> 1 Then
                    Response.End()
                End If
            Catch ex As Exception
                Response.Write("您还未登陆，请登陆之后进行操作!<a href='login.aspx'>登陆</a>")
                Response.End()
            End Try
            com.CommandText = "select username,zip,addr,phone,e_mail from account where userid='" & Session("username") & "'"
            com.Connection = con
            Dim myreader As SqlDataReader = com.ExecuteReader
            myreader.Read()
            TextBox1.Text = myreader(0)
            TextBox2.Text = myreader(1)
            TextBox3.Text = myreader(2)
            TextBox4.Text = myreader(3)
            TextBox5.Text = myreader(4)
        End If
        con.Close()
        Label2.Text = "欢迎" & Session("username")
        Label2.Visible = True
        Button1.Visible = True
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        con.Open()
        con1.Open()
        com.CommandText = "select username,zip,addr,phone,e_mail from account where userid='" & Session("username") & "'"
        com.Connection = con
        Dim myreader As SqlDataReader = com.ExecuteReader
        myreader.Read()
        If TextBox1.Text <> "" And TextBox2.Text <> "" And TextBox3.Text <> "" And TextBox4.Text <> "" And TextBox5.Text <> "" Then
            If TextBox1.Text <> myreader(0) Or TextBox2.Text <> myreader(1) Or TextBox3.Text <> myreader(2) Or TextBox4.Text <> myreader(3) Or TextBox5.Text <> myreader(4) Then
                com1.CommandText = "update account set username='" & TextBox1.Text & "',zip='" & TextBox2.Text & "',addr='" & TextBox3.Text & "',phone='" & TextBox4.Text & "',e_mail='" & TextBox5.Text & "' where userid='200343128'"
                com1.Connection() = con
                com1.ExecuteNonQuery()
            End If
            con1.Close()
            con.Close()
            con.Open()
            con1.Open()
            con2.Open()
            com.CommandText = "select count(orderid) from orders"
            com.Connection() = con
            Dim i As String = com.ExecuteScalar
            com2.CommandText = "select itemid,qty,untiprice from shopping where userid='" & Session("username") & "'"
            com2.Connection = con2
            Dim myreader2 As SqlDataReader = com2.ExecuteReader()
            While myreader2.Read()
                Dim mul As String = myreader2("qty") * myreader2("untiprice")
                com1.CommandText = "insert into lineitem values(" & i + 1 & ",'" & myreader2("itemid") & "'," & myreader2("qty") & "," & myreader2("untiprice") & "," & mul & ")"
                com1.Connection = con1
                com1.ExecuteNonQuery()
                com1.CommandText = "update item set qty=qty-" & myreader2("qty") & " where itemid='" & myreader2("itemid") & "'"
                com1.ExecuteNonQuery()
            End While
            con2.Close()
            con1.Close()
            con.Close()
            con2.Open()
            com2.CommandText = "delete from shopping where userid='" & Session("username") & "'"
            com2.Connection = con2
            com2.ExecuteNonQuery()
            Session("orderid") = i + 1
            Response.Redirect("order.aspx", True)
        Else
            Dim strscript As String = "<script language=javascript>alert('输入存在空的项！')</script>"
            RegisterClientScriptBlock("系统消息", strscript)
        End If
        con2.Close()
    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 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
End Class