Disabling a button

[valw_47]

Hello. I have a button that is configured as OnSelect to set a variable varStartTime to be the current date/time. I am trying to get the button to be disabled once this variable has populated with the date/time to avoid having the user select a new date/time.  My button code is this: 

Set(varStartTime, Now()); If(IsBlank(varStartTime), StartButton.Visible=true, StartButton.Visible=false), 

However, it does not disable the button.  Any suggestions on how to configure the button to do 2 functions for one click?

[anshulbatheja · Accepted solution]

Set the variable with the current timestamp as you did on the onSelect attribute. Remove the if part. Instead you could just use the same code in the DisplayMode

If(IsBlank(varStartTime),DisplayMode.Edit,DisplayMode.Disabled)

[valw_47]

Thank you. When I apply the IF statement, I get an error that there are invalid arguments in the IF Statement.  I'm not sure what is wrong with it. 

[valw_47]

I found my error. There was an additional context variable defined that once removed, this IF statement worked. 

[Digital]

What @anshulbatheja said if you want to disable the control.

If you want to make the control invisible, you could put the following:

IsBlank(varStartTime)

If there is no value in start time it will be visible. If there is a value it will disappear.

Personally I'd go with the disabled option but thought I'd mention