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Input form using SPO list sources with conditional values for dropdowns

Hello all,

I am totally PowerApps newbie, but looking at following solution -- I want to build PowerApp which would act as more advances PowerAutomate flow input. Wondering if it is possible to have something like that:

 

Simple canvas app, which has two dropdowns which are using SPO list with 2 multi-value columns as source:

vbvbvb_0-1668164655460.png

How it is possible to create conditional filter to say -> if Technology value = AAA, only show Topic values which has AAA in their name, if technology = BBB , only show ones which has BBB, etc?

1 ACCEPTED SOLUTION

Accepted Solutions

that's right the condition 'in' works like contains and you have to change the texts with your data for ex. if the name of your sharepoint list is 'ShpList', the name of the column is 'Topic' and the name of tech dropdown is 'drpTech' the formula will be:

Filter(
Choices(ShpList,Topic),
drpTech.Selected.Value in Value
|| IsBlank(drpTech.Selected.Value)
)

 I made a change into the code because i thought topics and technology were lists

View solution in original post

10 REPLIES 10

Hi,

In the Topic dropdown items property, you have to filter like this:

Filter(
<Topics>, //topic lists
<Tecnology dropdown name>.Selected.Value in <Topic Colunm> // topic field 
|| IsBlank(<Tecnology dropdown name>.Selected.Value) /* this condition will retrieve all items when tech dropdown is empty*/
)

 

Thanks, can you please clarify  what you mean by //topic lists and // topic field?

Names of SPO list and column? 

Yes

please let me know if you have any other question

Does it suppose work with multi-value SPO columns? Formula doesn't like name of <Topic Colunm> at all as it seems. Also, values are not going to be 1-to-1, it should be something like "contains" , for example:

 

Technology: AAA, BBB, CCC

Topics: AAA-Topic1, AAA-Topic2, BBB-Topic1, BBB-Topic2, CCC-Topic1, CCC-Topic2.

 

So if select AAA, it should filter only AAA-Topic1 and AAA-Topic2 because it contains name of technology "AAA" in the name of topic.

 

that's right the condition 'in' works like contains and you have to change the texts with your data for ex. if the name of your sharepoint list is 'ShpList', the name of the column is 'Topic' and the name of tech dropdown is 'drpTech' the formula will be:

Filter(
Choices(ShpList,Topic),
drpTech.Selected.Value in Value
|| IsBlank(drpTech.Selected.Value)
)

 I made a change into the code because i thought topics and technology were lists

That is amazing, I was missing "choices" bit, now everything works just fine!

Choices(ShpList,Topic),

 Bonus question, how to make both these dropdowns mandatory?

Hi
if they are inside a form, just change the the required property to true, if not use a condition before patch/collect like this:

If(

IsBlank(<techdropdown>.Selected.Value || IsBlank(<techdropdown>.Selected.Value),

Notify("dropdowns can't be empty",NotificationType.Error),

Patch(...) // your code goes here
)

Ok, I managed to fix required by adding condition to Submit button.

Guess final question, is it possible that that original filter does case sensitive filtering?  I found that some of Technology values can match string in the Topic names: for example, Tech = AAA, topic is BBB-Somethingaaa,  but it still makes a match , so only fix is to make it explicitly look for uppercase value only -- guess can be done with upper() / lower () functions?

yes. you need to set both datacards as required.

and yes change the 'in' for 'exactin' and you will have your case sensitive filter

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