queryaccessnum.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 queryAccessNum
    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 Button2 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
        '在此处放置初始化页的用户代码
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If TextBox1.Text = "" Then
            Response.Write("<script language=vbscript>alert ""不能用空信息进行查询!""</script>")
            Exit Sub
        ElseIf Not IsNumeric(TextBox1.Text) Then
            Response.Write("<script language=vbscript>alert ""请输入数字进行查询!""</script>")
            Exit Sub
        End If
        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 gAccessNum < " & TextBox1.Text
        Else
            sqlstr = "select * from goods where gType='" & DropDownList1.Items(DropDownList1.SelectedIndex).Value & _
                    "'  and  gAccessNum < " & 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 Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Response.Redirect("managerOption.aspx")
    End Sub
End Class