buy.aspx.vb

这是一个电子商务入门级的代码。 其中包括用户注册

Imports System.Data
Imports System.Data.OleDb
Public Class buy
    Inherits System.Web.UI.Page
    Protected WithEvents DropDownList1 As System.Web.UI.WebControls.DropDownList
    Protected WithEvents Label2 As System.Web.UI.WebControls.Label
    Protected WithEvents Label3 As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
    Protected WithEvents Button3 As System.Web.UI.WebControls.Button
    Protected WithEvents Button4 As System.Web.UI.WebControls.Button
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label

#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

    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
        
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim mycon As New OleDbConnection()
        Dim myds As New DataSet()
        mycon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("OnLineSale.mdb")
        mycon.Open()
        Dim sqlstr
        If DropDownList1.SelectedIndex = 0 Then
            sqlstr = "select * from goods where gName  like '%" & TextBox1.Text & "%'"
        Else
            sqlstr = "select * from goods where gType='" & DropDownList1.Items(DropDownList1.SelectedIndex).Value & _
                    "'  and  gName like '%" & TextBox1.Text & "%'"
        End If

        Session("sqlstr") = sqlstr
        Dim myadpt As OleDbDataAdapter = New OleDbDataAdapter(sqlstr, mycon)
        myadpt.Fill(myds, "table1")
        DataGrid1.DataSource = myds.Tables("table1").DefaultView
        DataGrid1.DataBind()
        mycon.Close()
        mycon = Nothing
    End Sub

    Private Sub DataGrid1_EditCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.EditCommand
        DataGrid1.EditItemIndex = e.Item.ItemIndex
        Dim mycon As New OleDbConnection()
        Dim myds As New DataSet()
        mycon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("OnLineSale.mdb")
        mycon.Open()
        Dim sqlstr
        sqlstr = Session("sqlstr")
        Dim myadpt As OleDbDataAdapter = New OleDbDataAdapter(sqlstr, mycon)
        myadpt.Fill(myds, "table1")
        DataGrid1.DataSource = myds.Tables("table1").DefaultView
        DataGrid1.DataBind()
        mycon.Close()
        mycon = Nothing
    End Sub

    Private Sub DataGrid1_CancelCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.CancelCommand
        DataGrid1.EditItemIndex = -1
        Dim mycon As New OleDbConnection()
        Dim myds As New DataSet()
        mycon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("OnLineSale.mdb")
        mycon.Open()
        Dim sqlstr
        sqlstr = Session("sqlstr")
        Dim myadpt As OleDbDataAdapter = New OleDbDataAdapter(sqlstr, mycon)
        myadpt.Fill(myds, "table1")
        DataGrid1.DataSource = myds.Tables("table1").DefaultView
        DataGrid1.DataBind()
        mycon.Close()
        mycon = Nothing
    End Sub

    Private Sub DataGrid1_UpdateCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.UpdateCommand
        Dim mycon As New OleDbConnection()
        Dim myds As New DataSet()
        Dim mycmd As New OleDbCommand()
        mycon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("OnLineSale.mdb")
        mycon.Open()
        Dim myNum
        Dim mytext As TextBox
        mytext = e.Item.Cells(6).Controls(1)
        myNum = mytext.Text
        If myNum = "" Then
            Response.Write("<script language=vbscript>alert ""不能添加空信息!""</script>")
            Exit Sub
        ElseIf Not IsNumeric(myNum) Then
            Response.Write("<script language=vbscript>alert ""请输入数字!""</script>")
            Exit Sub
        End If

        Dim sqlstr
        sqlstr = "insert into buy (cusID,gID,num) values('" & Session("cusID") & "','" & e.Item.Cells(0).Text & "'," & CLng(myNum) & ")"
        'Response.Write(Session("cusID"))
        'Response.Write(sqlstr)
        'Response.End()
        mycmd.Connection = mycon
        mycmd.CommandText = sqlstr
        mycmd.ExecuteNonQuery()
        
        sqlstr = "select * from goods "

        Dim myadpt As OleDbDataAdapter = New OleDbDataAdapter(sqlstr, mycon)
        myadpt.Fill(myds, "table1")
        DataGrid1.DataSource = myds.Tables("table1").DefaultView
        DataGrid1.EditItemIndex = -1
        DataGrid1.DataBind()
        mycon.Close()
        mycon = Nothing
    End Sub

 

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Response.Redirect("buyList.aspx")
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Response.Redirect("logon.aspx")
    End Sub
End Class