insertold.aspx.vb

这是用ASP.NET和SQLserver编写的购物网站的程序

Imports System.Data.SqlClient
Public Class insertold
    Inherits System.Web.UI.Page

#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 TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents DrList As System.Web.UI.WebControls.DropDownList
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label
    Protected WithEvents Label2 As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox2 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Button2 As System.Web.UI.WebControls.Button
    Protected WithEvents Label3 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
    Dim Cstring As String = ConfigurationSettings.AppSettings("ConnectionString")
    Dim nwindConn As SqlConnection = New SqlConnection(Cstring)
    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") <> 2) Then
                    Response.End()
                End If
            Catch ex As Exception
                Response.Write("您不是管理者,不能打开该页,<a href='webform1.aspx'>返回</a>")
                Response.End()
            End Try
            Session("userpower") = -1
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim s As String
        Dim cmd As New SqlCommand
        Dim strscript As String
        nwindConn.Open()
        If DrList.SelectedIndex = 0 Then
            s = "itemid"
        Else
            s = "itemname"
        End If

        If TextBox1.Text = "" Then
            strscript = "<script language=javascript>alert('您的产品编号或产品名不能为空！')</script>"
            RegisterClientScriptBlock("系统消息", strscript)
        Else
            Try
                cmd.CommandText = "update item set qty= qty +" & TextBox2.Text & " where " & s & "='" & TextBox1.Text & "'"
                cmd.Connection = nwindConn
                cmd.ExecuteNonQuery()
            Catch ex As Exception
                strscript = "<script language=javascript>alert('您的产品编号或产品名或数量输入有误，请检查！')</script>"
                RegisterClientScriptBlock("系统消息", strscript)
            End Try
            strscript = "<script language=javascript>alert('提交成功')</script>"
            RegisterClientScriptBlock("系统消息", strscript)

        End If
        nwindConn.Close()


    End Sub

    Private Sub DrList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DrList.SelectedIndexChanged
        Label1.Text = DrList.SelectedValue
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Session("userpower") = 2
        Response.Redirect("manager.aspx")
    End Sub
End Class