problem in design view
<p>I have designed a user control but its design view is not visible,can anybody help me out.</p>

<pre><code>&lt;%@ Control Language="C#" AutoEventWireup="true" CodeFile="Note.ascx.cs" Inherits="MFActivityPlanning.usercontrols_Note" %&gt;
&lt;%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %&gt;
&lt;%@ Register TagPrefix="uc" TagName="UserThumbNail" Src="~/usercontrols/UserThumbNail.ascx" %&gt;

&lt;script language="javascript" type="text/javascript"&gt;
    // Trims the blank space from the start and end of string
    function Trim(objValue) {
        var lRegExp = /^\s*/;
        var rRegExp = /\s*$/;
        objValue = objValue.replace(lRegExp, ""); //Perform LTRim
        objValue = objValue.replace(rRegExp, ""); //perform RTrim
        return objValue;
    }
    //Check for special characters
    function ValidateString(inputText) {

        if (inputText.match(/[&lt;&gt;]/)) {
            return false;
        }
        if (inputText.match(/(&amp;#)/)) {
            return false;
        }
        return true;
    }

&lt;/script&gt;

&lt;style type="text/css"&gt;
    .cal_Theme .ajax__calendar_container
    {
        background-color: #ffffff;
        border: solid 1px #cccccc;
    }
    .cal_Theme .ajax__calendar_title
    {
        border: none;
    }
&lt;/style&gt;
&lt;asp:UpdatePanel ID="upPnlNotes" runat="server"&gt;
    &lt;ContentTemplate&gt;
        &lt;asp:HiddenField ID="hdnCurrentObjectID" runat="server" /&gt;
        &lt;div align="center"&gt;
            &lt;asp:UpdateProgress ID="upProgNotes" AssociatedUpdatePanelID="upPnlNotes" DynamicLayout="true"
                runat="server"&gt;
                &lt;ProgressTemplate&gt;
                    &lt;div align="center"&gt;
                        &lt;div align="center" class="waitMessageStyle"&gt;
                        &lt;/div&gt;
                    &lt;/div&gt;
                &lt;/ProgressTemplate&gt;
            &lt;/asp:UpdateProgress&gt;
            &lt;cc1:AlwaysVisibleControlExtender TargetControlID="upProgNotes" ID="AlwaysVisibleControlExtender1"
                runat="server" UseAnimation="true" HorizontalSide="Center" HorizontalOffset="1"&gt;
            &lt;/cc1:AlwaysVisibleControlExtender&gt;
        &lt;/div&gt;
        &lt;table width="94%"&gt;
            &lt;tr&gt;
                &lt;td colspan="2"&gt;
                    &lt;asp:Label ID="lblError" runat="server" CssClass="diaryLinkStatusStyle"&gt;&lt;/asp:Label&gt;
                &lt;/td&gt;
            &lt;/tr&gt;
            &lt;tr&gt;
                &lt;td colspan="2"&gt;
                    &lt;asp:TextBox ID="txtNote" runat="server" Width="99%" TextMode="MultiLine" Font-Names="Arial"
                        MaxLength="4000" Rows="4"&gt;&lt;/asp:TextBox&gt;
                &lt;/td&gt;
            &lt;/tr&gt;
            &lt;tr&gt;
                &lt;td align="left" width="35%"&gt;
                    &lt;asp:Button ID="btnAddNote" runat="server" Text="Add Note" CssClass="btnStyle" OnClick="btnAddNote_Click"&gt;
                    &lt;/asp:Button&gt;
                    &lt;asp:Label ID="lblCharacterLeft" runat="server" Text="4000 remains" CssClass="lblStyle"
                        Style="color: Gray;"&gt;&lt;/asp:Label&gt;
                &lt;/td&gt;
                &lt;td align="right" width="65%" style="vertical-align: bottom;"&gt;
                    &lt;asp:Label ID="lblFilterMsg" runat="server" CssClass="noteTimeStampStyle" /&gt;
                    &lt;asp:ImageButton ID="ibtnCancelFilter" runat="server" Visible="false" ImageUrl="~/Images/cancel_filter.png"
                        OnClick="ibtnCancelFilter_Click" ToolTip="Clear Filter" /&gt;
                    &lt;asp:Image ID="imgFilter" runat="server" ImageUrl="~/Images/filter.png" Visible="false"
                        ToolTip="Filter Notes" Style="cursor: pointer;" /&gt;
                    &lt;cc1:ModalPopupExtender ID="imgFilter_ModalPopupExtender" runat="server" TargetControlID="imgFilter"
                        PopupControlID="pnlFilter" BackgroundCssClass="modalPopupBackgroundStyle" DropShadow="True"
                        CancelControlID="ibtnCloseFilter"&gt;
                    &lt;/cc1:ModalPopupExtender&gt;
                    &lt;asp:Panel ID="pnlFilter" runat="server" Style="display: none" BackColor="Window"
                        BorderStyle="Groove" BorderWidth="2px" CssClass="pnlFilter"&gt;
                        &lt;table cellspacing="2" cellpadding="2"&gt;
                            &lt;tr&gt;
                                &lt;td colspan="2" bgcolor="Gray"&gt;
                                    &lt;table width="100%" cellspacing="0" cellpadding="0"&gt;
                                        &lt;tr&gt;
                                            &lt;td align="right" style="width: 20px"&gt;
                                            &lt;/td&gt;
                                            &lt;td align="center"&gt;
                                                &lt;asp:Label ID="lblPopupHeading" runat="server" Text="Filter Notes" CssClass="lblStyle"
                                                    Font-Bold="true" ForeColor="White" /&gt;
                                            &lt;/td&gt;
                                            &lt;td align="right" style="width: 20px"&gt;
                                                &lt;asp:ImageButton ID="ibtnCloseFilter" runat="server" ImageUrl="~/Images/close.png" /&gt;
                                            &lt;/td&gt;
                                        &lt;/tr&gt;
                                    &lt;/table&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                            &lt;tr&gt;
                                &lt;td&gt;
                                    &lt;asp:Label ID="lblNoteBy" runat="server" CssClass="lblStyle" Text="Note by: " /&gt;
                                &lt;/td&gt;
                                &lt;td align="left"&gt;
                                    &lt;asp:DropDownList ID="ddlNoteBy" runat="server" Width="200" AppendDataBoundItems="true"
                                        CssClass="btnStyle"&gt;
                                    &lt;/asp:DropDownList&gt;
                                    &lt;asp:HiddenField ID="hdnNoteBy" runat="server" /&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                            &lt;tr&gt;
                                &lt;td&gt;
                                    &lt;asp:Label ID="lblDateBefore" runat="server" CssClass="lblStyle" Text="Added before: " /&gt;
                                &lt;/td&gt;
                                &lt;td align="left"&gt;
                                    &lt;asp:TextBox ID="txtDtBefore" runat="server" BackColor="Yellow" BorderWidth="0px"
                                        Width="80px" Text="Select a date" /&gt;
                                    &lt;asp:ImageButton ID="ibtnCalbefore" runat="server" ImageUrl="~/Images/calendar.gif" /&gt;
                                    &lt;cc1:CalendarExtender ID="txtDtBefore_CalendarExtender" runat="server" Enabled="True"
                                        TargetControlID="txtDtBEfore" PopupButtonID="ibtnCalbefore" Format="MM-dd-yyyy"
                                        CssClass="cal_Theme"&gt;
                                    &lt;/cc1:CalendarExtender&gt;
                                    &lt;asp:HiddenField ID="hdnDtBefore" runat="server" /&gt;
                                    &lt;asp:ImageButton ID="ibtnClrDtBefore" runat="server" ToolTip="Clear date" ImageUrl="~/Images/clear_field.png" /&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                            &lt;tr&gt;
                                &lt;td&gt;
                                    &lt;asp:Label ID="lblDtAfter" runat="server" CssClass="lblStyle" Text="Added after: " /&gt;
                                &lt;/td&gt;
                                &lt;td align="left"&gt;
                                    &lt;asp:TextBox ID="txtDtAfter" runat="server" BackColor="Yellow" BorderWidth="0px"
                                        Width="80px" Text="Select a date" /&gt;
                                    &lt;asp:ImageButton ID="ibtnCalAfter" runat="server" ImageUrl="~/Images/calendar.gif" /&gt;
                                    &lt;cc1:CalendarExtender ID="txtDtAfter_CalendarExtender" runat="server" Enabled="True"
                                        TargetControlID="txtDtAfter" PopupButtonID="ibtnCalAfter" Format="MM-dd-yyyy"
                                        CssClass="cal_Theme"&gt;
                                    &lt;/cc1:CalendarExtender&gt;
                                    &lt;asp:HiddenField ID="hdnDtAfter" runat="server" /&gt;
                                    &lt;asp:ImageButton ID="ibtnClrDtAfter" runat="server" ToolTip="Clear date" ImageUrl="~/Images/clear_field.png" /&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                            &lt;tr&gt;
                                &lt;td&gt;
                                    &lt;asp:Label ID="lblSearchby" runat="server" CssClass="lblStyle" Text="Search by: " /&gt;
                                &lt;/td&gt;
                                &lt;td align="left"&gt;
                                    &lt;asp:TextBox ID="txtFilter" runat="server" Width="180" CssClass="txtStyle" /&gt;
                                    &lt;cc1:TextBoxWatermarkExtender ID="txtFilter_TextBoxWatermarkExtender" runat="server"
                                        Enabled="True" TargetControlID="txtFilter" WatermarkText="Filter Expression"
                                        WatermarkCssClass="WaterMarkStyle"&gt;
                                    &lt;/cc1:TextBoxWatermarkExtender&gt;
                                    &lt;asp:HiddenField ID="hdnFilterSearch" runat="server" /&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                            &lt;tr&gt;
                                &lt;td align="center" colspan="2"&gt;
                                    &lt;asp:Button ID="btnApply" runat="server" Text="Apply" CssClass="btnStyle" OnClick="btnApply_Click" /&gt;
                                    &lt;asp:Button ID="btnCancel" runat="server" Text="Clear" CssClass="btnStyle" OnClick="btnCancel_Click" /&gt;
                                &lt;/td&gt;
                            &lt;/tr&gt;
                        &lt;/table&gt;
                    &lt;/asp:Panel&gt;
                    &lt;asp:Label ID="lblPageSize" runat="server" CssClass="lblStyle" ForeColor="Gray" Text="Page Size:"&gt;&lt;/asp:Label&gt;
                    &lt;asp:DropDownList ID="ddlPageSize" Width="50px" runat="server" AutoPostBack="True"
                        Font-Size="X-Small" ForeColor="Gray" OnSelectedIndexChanged="ddlPageSize_SelectedIndexChanged"&gt;
                        &lt;asp:ListItem&gt;15&lt;/asp:ListItem&gt;
                        &lt;asp:ListItem&gt;25&lt;/asp:ListItem&gt;
                        &lt;asp:ListItem&gt;50&lt;/asp:ListItem&gt;
                    &lt;/asp:DropDownList&gt;
                    &amp;nbsp;
                    &lt;asp:ImageButton runat="server" ID="ibtnRefreshNoteList" ImageUrl="~/Images/refresh.png"
                        ToolTip="Refresh List" /&gt;
                    &amp;nbsp;
                &lt;/td&gt;
            &lt;/tr&gt;
            &lt;tr&gt;
                &lt;td colspan="2"&gt;
                    &lt;asp:ListView ID="lvNoteList" runat="server" OnPreRender="lvNoteList_PreRender" OnItemDataBound="lvNoteList_ItemDataBound"&gt;
                        &lt;LayoutTemplate&gt;
                            &lt;div&gt;
                                &lt;asp:PlaceHolder ID="itemPlaceholderContainer" runat="server"&gt;&lt;/asp:PlaceHolder&gt;
                                &lt;asp:Panel ID="itemPlaceholder" runat="server"&gt;
                                &lt;/asp:Panel&gt;
                            &lt;/div&gt;
                        &lt;/LayoutTemplate&gt;
                        &lt;ItemTemplate&gt;
                            &lt;table width="100%" cellpadding="0" cellspacing="0" style="vertical-align: top; "
                                class="&lt;%# Container.DisplayIndex % 2 == 0 ? "" : "noteListAlternetLine" %&gt;"&gt;
                                &lt;tr&gt;
                                    &lt;td width="55px" align="center" valign="top" id="tdUserThumbnail" runat="server"&gt;
                                        &lt;uc:UserThumbNail ID="ucThumbNail" runat="server" PhotoSize="Small" PhotoWeight="Low"
                                            ShowEdit="false" ShowName="False" ShowEmailID="true" IsUseExternalData="true" /&gt;
                                    &lt;/td&gt;
                                    &lt;td valign="top" align="left"&gt;
                                        &lt;div class="noteHeaderStyle"&gt;
                                            by
                                            &lt;asp:HyperLink ID="addMember" runat="server" Font-Underline="True"&gt;
                                            &lt;/asp:HyperLink&gt;
                                            &lt;asp:Label ID="Time" runat="server" CssClass="noteTimeStampStyle" Text='&lt;%#FormatNoteTime(Convert.ToDateTime(Eval("CREATED_ON")))%&gt;'
                                                ToolTip='&lt;%# "Added On: " + Eval("CREATED_ON")%&gt;'&gt;
                                            &lt;/asp:Label&gt;
                                        &lt;/div&gt;
                                        &lt;div id="note" runat="server" class="noteTextStyle"&gt;
                                            &lt;%#ParseExternalLinks(Convert.ToString(Eval("NOTE")).ToString().Replace("\n", "&lt;br/&gt;"))%&gt;&lt;/div&gt;
                                    &lt;/td&gt;
                                &lt;/tr&gt;
                            &lt;/table&gt;
                        &lt;/ItemTemplate&gt;
                    &lt;/asp:ListView&gt;
                    &lt;asp:DataPager ID="dpNoteList" runat="server" PageSize="15" PagedControlID="lvNoteList"&gt;
                        &lt;Fields&gt;
                            &lt;asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="true" ShowNextPageButton="false"
                                ShowPreviousPageButton="false" /&gt;
                            &lt;asp:NumericPagerField /&gt;
                            &lt;asp:NextPreviousPagerField ButtonType="Link" ShowLastPageButton="true" ShowNextPageButton="false"
                                ShowPreviousPageButton="false" /&gt;
                        &lt;/Fields&gt;
                    &lt;/asp:DataPager&gt;
                &lt;/td&gt;
            &lt;/tr&gt;
        &lt;/table&gt;
    &lt;/ContentTemplate&gt;
&lt;/asp:UpdatePanel&gt;
</code></pre>
