SharePoint DatePicker is not working in Visual webpart

Question

Hi,
The sharepoint date picker is not working for Visual webparts created in VS 2012 (SP 2013).
In my visual webpart, I added the form digest, and then the sharePoint date control.
<script type="text/javascript" src="/_layouts/15/datepicker.js"></script>
<SharePoint:DateTimeControl ID="dtDate" runat="server" DateOnly="true" />
I get the "/ error in Application". Many websites are saying to add the below line to the datepicker:
<SharePoint:DateTimeControl ID="dtDate" runat="server"
DateOnly="true" DatePickerFrameUrl="<%
$SPUrl:~sitecollection/_layouts/15/iframe.aspx %>" />
But adding the "DatePickerFrameUrl" gives error in the "InitializeControl()" method available in OnInit().
Error: The name InitializeControl does not exist in the current context.
I have checked this:
http://developmentsimplyput.blogspot.in/2013/04/sharepoint-datetimecontrol-issue-when.html
http://sharepoint.stackexchange.com/questions/57092/sharepointdatetimecontrol-crashes-in-sp2013-webpart
but did not solve the issue. Also creating a root site for just a DatePicker control is not an option for me.
Has anybody found a solution to this?
How to use the SharePoint datepicker in visual webpart for SP 2013?
Thanks

Answer 1

hi
did you try to investigate the initial error more deeply, e.g. check stack trace in the logs? In our case it worked quite straightforward (but it was in SP2010) by adding the following control on ascx control:
<SharePoint:DateTimeControl ID="Foo" OnDateChanged="StartTimeChanged" HoursMode24="true" FirstDayOfWeek="1" AutoPostBack="true" runat="server" />
If it is problematic to check logs, you may create custom control which inherits OTB DateTimeControl, override appropriate methods in it and then check the error in debugger:
public class MyDateTimeControl : DateTimeControl
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