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I have a lightswitch screen and want to change a number of labels if the date changes.  How do I test if screen is initialized?

Posted on 2014-12-14
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Last Modified: 2014-12-19
I don't want the this.FindControl("RoomBookings").ControlAvailable += ChangeHeader; when the form hasn't been initialized yet.

        partial void ParameterFromDate_Changed()
        {
           
            if ({Need a test here to make sure the form has been initialized first.  Causes error since form isn't setup yet})
            {
                this.FindControl("RoomBookings").ControlAvailable += ChangeHeader;
            }
        }
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Question by:Peter H.
  • 2
3 Comments
 
LVL 15

Expert Comment

by:ChloesDad
ID: 40499376
Why not put a timer control on the form. Then the timer_elapsed event will only fire if the form is in memory so you wont need to check if the form is in memory.

You can then trigger the timer every few seconds, and check if the date is different from the last time the event fired using a private variable in the form. When you do see a change you can change the labels as required.
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Accepted Solution

by:
Peter H. earned 0 total points
ID: 40499383
Actually I just solved it a few min ago.  

Added a property
public Boolean FirstTime = true;

        partial void ParameterFromDate_Changed()
        {
           
            if (this.FirstTime == false )
            {
                this.FindControl("Bookings").ControlAvailable += ChangeHeader;
            }
            this.FirstTime = false;
0
 

Author Closing Comment

by:Peter H.
ID: 40508797
Found a workaround that worked.
0

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