create a vote with click limit

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Posted on 24 Jul 2020 01:01:36 by JACK_LAI_1117

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I want use powerapps to development a vote system .

I will let my user to chose which period they can to do something , but each period has limit ,maybe 20 people . When the click time reach the limit , the item will become “gray “ and user can not chose it.

So how can I finish my job or someone can tell me it has reference paper , thank you very much !!!

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JACK_LAI_1117 267 on 31 Jul 2020 at 01:47:21

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Re: create a vote with click limit

YUP!!
Finally , I finish this job today , in your method it can limit the click amount in this app

@v-bofeng-msft
Thank you very much~
JACK_LAI_1117 267 on 24 Jul 2020 at 07:57:41

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Re: create a vote with click limit

@v-bofeng-msft

Thank you very much , maybe next monday I will try it

Now I have a template to reference , YES!!!!
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v-bofeng-msft on 24 Jul 2020 at 05:39:07

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Re: create a vote with click limit

Hi @JACK_LAI_1117 :
I think this problem should start from two aspects: data source construction and app construction.
I assume there are two events for the user to choose: "event1" and "event2".
1\Can a user select two events at the same time?
2\Can a user select the same event multiple times?
I assume that a user can only select one event at a time, and an event cannot be selected multiple times.
I'v made a test for your reference:
1\My data source(TheList-SharePointList):
Column (click to edit) Type
Title Single line of text
DisplayName Single line of text
Event Single line of text
2\Add two buttons(Event1/Event2)
Event1
OnSelect

Patch(TheList,{Title:Text(Now()),DisplayName:User().FullName,Event:"Event1"})

DisplayMode

If(User().FullName in TheList.DisplayName || CountRows(Filter(TheList,Event="Event1"))>=20,Disabled,Edit)

Event2
OnSelect

Patch(TheList,{Title:Text(Now()),DisplayName:User().FullName,Event:"Event2"})

DisplayMode

If(User().FullName in TheList.DisplayName || CountRows(Filter(TheList,Event="Event2"))>=20,Disabled,Edit)

Best Regards,
Bof
mdevaney 29,987 Moderator on 24 Jul 2020 at 02:55:58

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Re: create a vote with click limit

@JACK_LAI_1117

Same idea applies here...

Use this code in the OnSelect property of the vote button to increase the vote count.

Set(varPatchRecord, LookUp(your_datasource_name, ID=ThisItem.ID)); Patch(your_datasource_name, varPatchRecord, {NumberOfPeople: varPatchRecord.NumberOfPeople + 1});

Put this code in the DisplayMode property of the vote button. It will disable voting after 20 people have voted.

If(ThisItem.NumberOfPeople >= 20, DisplayMode.Disabled, DisplayMode.Edit)

My example assumes the vote button is inside a gallery or a form and there is a datasource with a column called NumberOfPeople storing the votes total.

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JACK_LAI_1117 267 on 24 Jul 2020 at 02:25:12

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Re: create a vote with click limit

@mdevaney

NO , I mean 20 person , because my meeting room has it's capacity , so in order to prevent too many person chose the same time , son I need to set up this condition ~~~
mdevaney 29,987 Moderator on 24 Jul 2020 at 01:39:21

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Re: create a vote with click limit

@JACK_LAI_1117
20 people is not a unit of measure for time. I will assume you meant to say: 20 minutes.

Put this code in the DisplayMode property of the vote button. It will disable voting after 20 minutes

If(Now() > DateAdd(ThisItem.Created, 20, Minutes), DisplayMode.Disabled, DisplayMode.Edit)

I assume the vote button is inside of a Form. Therefore I used the ThisItem operator.

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