Invalid date/time: 7/8/2016 10:32 PM Error on Task Custom button

Question

I have created a custom detail button on Task. On click of the button I am calling URL like

/apex/TaskVF?subject={!Task.Subject}&LastModifiedDate={!Task.LastModifiedDate}.

I am getting the following error and following error displayed on the page:

Invalid date/time: 7/8/2016 10:32 PM

Url:

/apex/TaskVF?subject=Call&last=7%2F8%2F2016+10%3A32+PM

I need this Subject and LastModifiedDate in my controller to use.

Here is the code I am using to parse the Datetime

public class TaskController {
    public Datetime dt {get;set;}
    public TaskController() {
        dt =Datetime.valueof(ApexPages.currentPage().getParameters().get('last'));
    }
}

Answer 1

Use Datetime.parse instead of Datetime.valueOf, and it can handle the format you have provided. I used it in a sample page that mimics your own. Here was my constructor:

public TaskController()
{
    dt = Datetime.parse(ApexPages.currentPage().getParameters().get('last'));
    system.debug(dt);
}

Here was the output:

DEBUG|2016-07-09 04:32:00

Perhaps you need to do some work to get the time in the correct time zone. The following worked for me:

dt = Datetime.parse(ApexPages.currentPage().getParameters().get('last'));
dt = dt.newInstanceGmt(dt.date(), dt.time());

New output:

DEBUG|2016-07-08 22:32:00