用户点击取消时，把cookies("SN") 清除，请问要怎么弄？ - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

或者不用cookie,怎么获取网页控件ID为 sn 的字段值？

Dim e As RequestEventArgs = args(0)

Dim wb As New weui

wb.DeleteCookie("SN")

If e.Cookies.ContainsKey("username") Or e.Cookies.ContainsKey("password") Then '如果cookie里面有 username 和 password字段

wb.AddForm("","form1","CheckPd.htm") '.Attribute="" ' 由CheckPd接收提交的数据

With wb.AddInputGroup("form1","ipg1","请扫描设备标签上的二维码")

.AddInput("SN","SN","Text").Attribute="""

.AddHidenValue("test","test") '为了避免一扫描就跳转,添加的干扰代码

End With

With wb.AddButtonGroup("form1","btg1",True) '显示待用户扫描的界面

.Add("btnOK","确定","button").Attribute="" 'button千万不能写成submit,否则就会造成数据提交两遍

.Add("btn1", "退出登录", "button","./exit.htm") '返回原页面

End With

'当扫描到没有收录的二维码时,给出不存在的提示

With wb.AddDialog("","dlg3", "错误","") '增加订单失败提示框

.AddButton("btnOK","确定")

End With

'存在重复盘点记录时,给出是否重新盘点的提示.

With wb.AddDialog("","dlg4", "重新盘点确认","您确定要对当前设备重新盘点吗?")

.AddButton("btnCancel","取消").Kind = 1

.AddButton("btnOK","继续","./CheckPd.htm?SN=" & e.Cookies("SN") )

End With

wb.InsertHTML("<script>assetnumber.focus(); </script>")

wb.AppendHTML("<script src='./ajax/libs/pdScan.js'></script>") '引入脚本文件

e.WriteString(wb.Build)

Else

wb.InsertHTML("<meta http-equiv='Refresh' c>") '如果不含username或password的cookies,那就直接跳转到登录界面

e.WriteString(wb.Build) '生成网页

End If

主题：用户点击取消时，把cookies("SN") 清除，请问要怎么弄？