how to limit to selection of check boxes max to 3?

[rajkumar88]

Hello Everyone,

Do any one know how can below scenario be achieved. 

I have a  screen with 19 checkboxes. Based up on the selection it will update the column in SharePoint list. This part is working as I Expected. 

But the issue is that users can select all the checkboxes and I am not able to limit it to any 3 or max 3 only. 

Any help on this one please?

[DustinCooper]

In the OnChange event for each CheckBox add a number variable that adds 1 if the value is true, and subtracts one if its changed to false. Then set the display mode on each to Edit if the variable < 3 and disabled if not. 

Edit: Just to clarify each checkbox would use the same variable. 

Dustin 

[rajkumar88]

@DustinCooper 

I am sorry to asl you again. I am bit new to this and not sure where and how to add exactly. can you please elaborate steps if possible with example? Sorry to bother you. 

[Pstork1]

The option I was thinking of was to do the same thing for each checkbox, but then disable/enable the Submit button depending on whether the value of the resulting variable was <3.  That way they can still access the checkboxes to change their selections, but can only submit if they select 3 or less.

[rajkumar88]

@Pstork1 

can we also say that please select only 3 as a small pop-up or hide.unhide text box along with submit button? 

and can you please let me know where and how to add code on these checkboxes? 

[DustinCooper]

[rajkumar88]

@DustinCooper  thanks a lot dustin. Let me quickly test it and get abck to you. 

[Pstork1]

In the OnStart for the app use this code

Set(checkedBoxes,0)

For each Checkbox put the following code in the OnChecked property

Set(checkedBoxes,checkedBoxes+1)

And this goes in the OnUnChecked property

Set(checkedBoxes,checkedBoxes-1)

Then put this in the Visible property of the error label

If(checkedBoxes > 3,true,false)

And this in the Display Mode property for the button

If(checkedBoxes > 3,DisplayMode.Disabled,DisplayMode.Edit)

That should be all you need.

[rajkumar88]

hi @DustinCooper ,

you solution is disabling other checkboxes after 3 selections and there is no other way to uncheck and check other checboxes. From user prespective they will be confused why remaining are disabled and not allowing them to re-check other checboxes. Do we need to click on reset to select new 3checkboxes? 

[DustinCooper]

For DisplayMode try this: If(Or(CheckBox1.value,sCount<3),DisplayMode.Edit,Disabled)

The above should allow the three that are checked to be unchecked (Edit).