Object reference error on editing calendar event

Question

Hi,

I am working on SharePoint Online Calendar. By default the Start Date and End Date fields are required in Event Content Type. I made both of these fields optional. When I add an Event to the Calendar, with blank Start and End Date the Event gets saved without any problem. When I edit the Event, do nothing and click on save, exception occurs.

Object reference not set to an instance of an object.

[NullReferenceException: Object reference not set to an instance of an object.] Microsoft.SharePoint.WebControls.DateTimeField.GetDateValue(DateTimeField fieldControl) +128 Microsoft.SharePoint.WebControls.DateTimeField.Validate(Boolean validateMemberControl) +474 Microsoft.SharePoint.WebControls.DateTimeField.Validate() +44 System.Web.UI.Page.Validate() +117 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +105 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint

Answer 1

Hi Manasa,

This is an expected behavior in SharePoint Calendar. Though we can set the Start Date and End Date columns to be optional, we need to fill in the two columns when editing the events.

The following thread is for your reference.

Sharepoint 2010 Calendar - Start Date / End Date Blank –

Thanks,

Ran

Answer 2

Thanks for the response.