主题：动态下拉

Dim e As RequestEventArgs = args(0)

Dim path As String = "foxtableAppTest"

Dim wb As new weui

wb.appendHTML("<meta name='viewport' c />",True)

wb.AppendHTML("<script type='text/javascript' src='/" & path & "/js/common.js'></script>", True)

wb.AppendHTML("<link rel='stylesheet' href='/" & path & "/css/common.css' Type='text/css' charset='utf-8'/>", True)

wb.appendHTML("<script src='../mui/js/mui.min.js'></script>",True)

wb.appendHTML("<script Type='text/javascript' charset='utf-8'>mui.init();</script>",True)

wb.appendHTML("<style>.fox_page_title{color:white}</style>",True)

wb.appendHTML("<style>.fox_page_subtitle{color:white;}</style>",True)

wb.appendHTML("<style>.fox_page_header{background-color:dodgerblue;}</style>",True)

wb.appendHTML("<style>.weui_label{color:dodgerblue;}</style>",True)

wb.appendHTML("<style>h5,p{margin:8px 16px;}</style>",True)

Dim cmd1 As new SQLCommand

cmd1.C

cmd1.CommandText ="Se/ect DISTINCT 单位,部门,角色 from {单位用户} where 角色='班务'"

Dim dt1 As DataTable =  cmd1.ExecuteReader

Dim xxs As List(of String)=dt1.GetValues("单位")

wb.AddPageTitle("","ph1","新生报名","请扫描学校给定的报名码")

wb.AddForm("","form1","bmxx.htm")

With wb.AddInputGroup("form1","ipg1","")    '

    Dim In1 = .AddInput("身份证号","身份证号:","Text")

    In1.readonly = True

    In1.value = e.Cookies("username")

    Dim In2= .AddInput("学生姓名","学生姓名:","Text")

    In2.readonly = True

    In2.value = e.Cookies("userxm")

    Dim cmd As new SQLCommand

    cmd.C

    cmd.CommandText = "SE/ECT 身份证件号,申读学校,申读班级,录取类型,问题 FROM {学生信息} where 身份证件号 ='" & e.Cookies("username") & "'"

    Dim dt As DataTable = cmd.ExecuteReader()

    Dim dr As DataRow

    If dt.DataRows.Count>0

        dr = dt.DataRows(0)

        If dr("录取类型")>""

            Dim Int1= .AddSelect("申读学校","申读学校:",dr("申读学校"))

            int1.enabled=False

            Dim Int2= .Addselect("申读班级","申读班级:",dr("申读班级"))

            int2.enabled=False

        Else

            Dim Int1 =.AddSelect("申读学校","申读学校:"," |" & String.join("|",xxs.Toarray).replace(dr("申读学校"), "[" & dr("申读学校") & "]"))

        End If

    Else

        Dim Int1 =.AddSelect("申读学校","申读学校:"," |" & String.join("|",xxs.Toarray))

        Int1.attribute=""

        Dim Int2= .Addselect("申读班级","申读班级:","")

    End If

    .AddHiddenValue("类型","a")

    With wb.AddButtonGroup("form1","btg1",False)

        Dim btn1= .Add("btn1", "扫报名码", "button")

        If dr IsNot Nothing AndAlso dr("录取类型")>""

            btn1.kind=1

            btn1.enabled=False

        Else

            btn1.Attribute = " & path & "/plus/barcode_scan.html',true,true);"""

            btn1.kind=1

        End If

        Dim btn2= .Add("btn2", "信息填报", "submit")

        btn2.kind=1

        Dim btn3= .Add("btn3", "返回", "button")

        btn3.kind=1

        btn3.Attribute=""

    End With

    If dr IsNot Nothing AndAlso dr("问题")>""

        wb.InSertHtml("form1","<p style= 'font-size:15px;color:red;'>存在信息问题，请修改提交：</P>")

        wb.InSertHtml("form1","<p style= 'font-size:15px;'>" & dr("问题") & "</P>")

    End If

    If dr IsNot Nothing AndAlso dr("录取类型")>""

        wb.InSertHtml("form1","<div style= 'background:url(../picture/nqbj.jpg);height:150px;background-size：cover'>" )

        wb.InSertHtml("form1","<p style= 'text-align:center;font-size:20px;color:white;margin-top:20px;'>录取通知</P>")

        wb.InSertHtml("form1","<p style = 'text-indent:2em;color:white;'>经学校招生小组审核同意，你已被我校录取，请按相关时间安排入学就读，如有申读学校变更，需经学校教务处同意方可进行变更。</P>")

        wb.InSertHtml("form1","</div>")

    End If

End With

wb.InsertHTML("<script>function scaned( t, r, f ) {document.getElementById('申读学校').value=r.split(',')[0]; document.getElementById('申读班级').value=r.split(',')[1];document.getElementById('类型').value=r.split(',')[2]}</script>")

For Each xx As String In xxs

    wb.InsertHTML("<p hidden id='" & xx & "'>" & " |" & dt1.GetComboListString("部门","单位='" & xx & "'") & "</p>")

Next

wb.AppendHTML("<script src=./lib/getsdbj.js></script>")

e.WriteString(wb.Build)

e.Handled=True

请问老师，上面的动态下拉，红色的第三句，应是当打开时能显示当前的申读班级，也可以有下拉内容，该怎么写才行