webform1.aspx.vb

来自「这是用ASP.NET和SQLserver编写的购物网站的程序」· VB 代码 · 共 164 行

Imports System.Data.SqlClient
Public Class WebForm1
    Inherits System.Web.UI.Page
    Dim into As String = ConfigurationSettings.AppSettings("ConnectionString")
    Dim con1 As SqlConnection = New SqlConnection(into)
    Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label
    Protected WithEvents LinkButton1 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton2 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton3 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton4 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents DataList1 As System.Web.UI.WebControls.DataList
    Protected WithEvents LinkButton5 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton6 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton7 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents LinkButton8 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents Table1 As System.Web.UI.HtmlControls.HtmlTable
    Protected WithEvents Td1 As System.Web.UI.HtmlControls.HtmlTableCell
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents Label3 As System.Web.UI.WebControls.Label
    Protected WithEvents Image1 As System.Web.UI.WebControls.Image
    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 HyperLink2 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink1 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink3 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink4 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink5 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink6 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Hyperlink7 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents Label2 As System.Web.UI.WebControls.Label

    '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()
        con1.Open()
        If Not IsPostBack Then
            If Session("userpower") = 1 Then
                Label3.Text = "欢迎" & Session("username")
                Label3.Visible = True
                Button1.Visible = True

            Else
                Label3.Visible = False
                Button1.Visible = False
            End If
            Dim cmd As New SqlCommand
            cmd.CommandText = " select ctime from currenttime"
            cmd.Connection = con
            Dim a As DateTime = cmd.ExecuteScalar
            If a < Today Then
                cmd.CommandText = "update currenttime set ctime='" & Today & "'"
                cmd.Connection = con
                cmd.ExecuteNonQuery()
                cmd.CommandText = "select count(*) from commentary "
                cmd.Connection = con
                Dim i As Int32 = cmd.ExecuteScalar
                If i > 1000 Then
                    cmd.CommandText = "select * from commentary"
                    cmd.Connection = con
                    Dim myreader As SqlDataReader = cmd.ExecuteReader()
                    For i = 0 To 199
                        myreader.Read()
                        Dim cmd1 As New SqlCommand
                        cmd1.CommandText = "delete commentary where username='" & myreader("username") & "' and date='" & myreader("date") & "'"
                        cmd1.Connection = con1
                        cmd1.ExecuteNonQuery()

                    Next
                End If
            End If
        End If
        Dim strSel As String = "select  *  from  top6 "
        Dim StartIndex As Integer = 0
        Dim PageSize As Integer = 6
        Dim ds As DataSet = New DataSet
        Dim MyAdapter As SqlClient.SqlDataAdapter = New SqlClient.SqlDataAdapter(strSel, con)
        MyAdapter.Fill(ds, StartIndex, PageSize, "Result")

        DataList1.DataSource = ds.Tables("result").DefaultView
        DataList1.RepeatDirection = RepeatDirection.Horizontal
        DataList1.DataBind()
        con.Close()
        con1.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 ImageButton4_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs)

    End Sub

    Private Sub ImageButton2_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs)
        Response.Redirect("login.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") = ""
        Label3.Visible = False
        Button1.Visible = False
    End Sub

    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged

    End Sub

    Private Sub LinkButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton1.Click
        Session("mainPRO") = LinkButton1.Text
        Response.Redirect("WebForm3.aspx")
    End Sub

    Private Sub LinkButton2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton2.Click
        Session("mainPRO") = LinkButton2.Text
        Response.Redirect("webform3.aspx")
    End Sub

    Private Sub LinkButton3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton3.Click
        Session("mainPRO") = LinkButton3.Text
        Response.Redirect("webform3.aspx")
    End Sub

    Private Sub LinkButton4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton4.Click
        Session("mainPRO") = LinkButton4.Text
        Response.Redirect("WebForm3.aspx")
    End Sub

    Private Sub DataList1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DataList1.SelectedIndexChanged

    End Sub

    Private Sub LinkButton7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton7.Click
        Response.Redirect("connection.aspx")
    End Sub

    Private Sub LinkButton5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton5.Click
        Response.Redirect("introduce.aspx")
    End Sub

    Private Sub LinkButton8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton8.Click
        Response.Redirect("register.aspx")
    End Sub
End Class