The controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

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<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="NoticeboardDocs.aspx.vb"
    Inherits="CBRE.TSP.Web.NoticeboardDocs" %>
     <%@ Import Namespace="Common" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Noticeboard Documents</title>
    <link type="text/css" href="../Styles/grid/css/grid.css" rel="stylesheet" />
    <link type="text/css" href="../Styles/grid/css/round.css" rel="stylesheet" />
    <link type="text/css" href="../Styles/grid/css/core.css" rel="stylesheet" />
    <link href="../Styles/reskin/screen.css" type="text/css" rel="stylesheet" />
    <script type="text/javascript">

        function ShowDocument(docId) {
            if (docId > 0 || docId != "") {
                var isMobileLogin = '<%= Session("isMobile") %>';

                var isMob = false;
                if (isMobileLogin != 'undefined') {
                    if (isMobileLogin == "true") {
                        isMob = true;
                    }
                }

                if (isMob == true) {
                    $("<div class='full-popup'><div class='file-popup'><a href='#' onclick='javascript:closeHandler();' class='close-full-popup'>"> Close</a><div class='iframe-holder' style='overflow:auto; -webkit-overflow-scrolling:touch;'><iframe scrolling='yes'></iframe></div></div></div>").appendTo("body");

                    var src = "../User/ShowDocument.aspx?DocumentID=" + docId;
                    $(".full-popup iframe").attr("src", src + "#view=fit");

                    $(document).on("click", ".close-full-popup", function () {
                        $(this).parents(".full-popup").detach();
                        return false;
                    });
                }
                else {
                    window.open("../User/ShowDocument.aspx?DocumentID=" + docId, "_blank", "height=700,width=900,location=no,menubar=no,resizable=yes,scrollbars=yes,titlebar=no,toolbar=no,top=50,left=50");
                }
            }
        }

        function closeHandler() {
            $.ajax(
            {
                type: 'post',
                url: '../User/ShowDocument.aspx/DeleteOpenedFile',
                contentType: "application/json; charset=utf-8",
                datatype: 'json',
                success: function (result) {
                }
            })
        };
    </script>
</head>
<body>
<asp:PlaceHolder ID="PlaceHolder1" runat="server">
    <form id="form1" runat="server">
    <div id="mainfr_right">
        <div class="wsmdivmain">
            <p id="pagetitle">
                <asp:Label runat="server" ID="lblPageTitle" Text="Documents Attached"></asp:Label>
            </p>
            <br />
            <asp:GridView ID="gvDocs" runat="server" CaptionAlign="Top" CellPadding="1" CellSpacing="2"
                AutoGenerateColumns="False" Width="100%" DataKeyNames="DocumentId">
                <HeaderStyle CssClass="webGridheaderStyle" HorizontalAlign="Center" />
                <RowStyle CssClass="webGridrowStyle" Wrap="true" />
                <AlternatingRowStyle CssClass="webGridalternatingStyle" HorizontalAlign="Center" />
                <Columns>
                    <asp:TemplateField HeaderText="Filename">
                        <ItemTemplate>
                            <asp:HyperLink ID="HyperLink1"  runat="server" NavigateUrl='Javascript:void(0);' 
                                onclick='<%# "ShowDocument("""  &  Encryption.EncryptParameter(DataBinder.Eval(Container.DataItem, "DocumentID")) & """); return false;"%>'
                                Target="_blank" Text='<%# Eval("DocumentName") %>'>
                            </asp:HyperLink>
                        </ItemTemplate>
                        <ItemStyle HorizontalAlign="Center" />
                    </asp:TemplateField>
                    <asp:BoundField DataField="Filesize" HeaderText="Size (bytes)" ItemStyle-HorizontalAlign="center">
                        <ItemStyle HorizontalAlign="center"></ItemStyle>
                    </asp:BoundField>
                    <asp:BoundField DataField="Created" HeaderText="Date Uploaded" ItemStyle-HorizontalAlign="center">
                        <ItemStyle HorizontalAlign="center"></ItemStyle>
                    </asp:BoundField>
                </Columns>
            </asp:GridView>
        </div>
    </div>
    </form>
    </asp:PlaceHolder>
</body>
</html>

Protected Overrides Sub OnInit(e As System.EventArgs)
        MyBase.OnInit(e)

        Dim css As New HtmlLink
        Dim stylesheet As String = ThemeWrapper.GetMyTheme.TenantStyleSheet

        If String.IsNullOrEmpty(stylesheet) Then Exit Sub

        With css
            .Href = stylesheet
            .Attributes("rel") = "stylesheet"
            .Attributes("type") = "text/css"
        End With

        MyBase.Header.Controls.Add(css)

    End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If Not Page.IsPostBack Then

            Dim iNoticeboardId = Request.QueryString("NoticeboardId")
            LoadDocsGrid(iNoticeboardId)

        End If
    End Sub

What I have tried:

i have put

Quote:
<asp:PlaceHolder ID="PlaceHolder1" runat="server">

in body but i did not worked !!

Posted 19-Apr-17 23:16pm

Akhil Jain

Updated 19-Apr-17 23:25pm

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F-ES Sitecore · Accepted Answer · 2017-04-19T23:25:00

Solution 1

The error is self-explanatory, you are trying to add a control to the head element but head contains code blocks

var isMobileLogin = '<%= Session("isMobile") %>';

Move your script tag out of the header and put it somewhere else like at the top of the body.

Posted 19-Apr-17 23:25pm

F-ES Sitecore

Comments

Akhil Jain 20-Apr-17 5:43am

thanks man !!