Auto populate first dropdown value in the second dropdown in a customized gallery

[ZenHen]

Hi, 
I need a help with my powerapps Gallery, I have a customized gallery named "TripRecord" which also has 4 input fields, '+' and 'X' icons to add and delete a record.

input1- from location: dropdown, input2- To location: dropdown, input3- from date: datepicker, input4- to date: datepicker

what I want the gallery to do as below,

ex: consider the first record items is selected as below

fromdropdown1: Canada   Todropdown1: Mexico 

Fromdate1: 1/01/2020        todate1: 2/01/2020

and in the second record of the gallery, I want the Fromdropdown2 to get the value from Todropdown1 to be auto populated as below and let the user choose the values for the rest of the fields.

Fromdropdown2: Mexico  (auto populate Mexico)   todropdown2: 

Fromdate2:        todate2: 

[v-bofeng-msft]

Hi @ZenHen :

I've made a test for your reference:

My data source-TripRecord:

• ID-number
• Input1-Text
• Input2-Text
• Input3-Date
• Input4-Date

ClearCollect(TripRecord,{Input1:"",Input2:"",Input3:Today(),Input4:Today()})

1\Add a gallery and set it's Items proeprty to:

TripRecord

2\Add two drop down controls into this gallery(fromdropdown/Todropdown)

Set fromdropdown:

Items

["","Canada","Mexico","US","UK"]

OnChange

Patch(TripRecord,ThisItem,{Input1:fromdropdown.SelectedText.Value})

Default

ThisItem.Input1

Set Todropdown:

Items

["","Canada","Mexico","US","UK"]

OnChange

Patch(TripRecord,ThisItem,{Input2:Todropdown.SelectedText.Value})

Default

ThisItem.Input2

3\Add two date picker controls into this gallery(Fromdate/Todate)

Set Fromdate

OnChange

Patch(TripRecord,ThisItem,{Input3:Fromdate.SelectedDate})

DefaultDate

ThisItem.Input3

Set Todate

OnChange

Patch(TripRecord,ThisItem,{Input4:todate.SelectedDate})

DefaultDate

ThisItem.Input4

4\Add an "Add" icon and an "Rubbish-bin" icon

Add icon-OnSelect

Patch(TripRecord,Defaults(TripRecord),{ID:CountRows(TripRecord)+1,Input1:Todropdown.SelectedText.Value})

Rubbish-bin icon-OnSelect

Remove(TripRecord,ThisItem)

Best Regards,

Bof

[ZenHen]

Hello Bof, 

Thankyou very much for your response, i followed your steps, but unfortunately it did not give me the result i wanted. i want the to country to be auto populated as from country in the second entry as shown in the below image.

@v-bofeng-msft 

[v-bofeng-msft · Accepted solution]

Hi @ZenHen :

I've made a test but it worked well.

Please try adding a unique identifier "ID" to TripRecord.For Example:

ClearCollect(TripRecord,{Input1:"",Input2:"",Input3:Today(),Input4:Today()})

1\Add a gallery and set it's Items proeprty to(Sort the items displayed in the Gallery in ascending order😞

Sort(TripRecord,ID)

2\Add two drop down controls into this gallery(fromdropdown/Todropdown)

Set fromdropdown:

Items

["","Canada","Mexico","US","UK"]

OnChange

Patch(TripRecord,ThisItem,{Input1:fromdropdown.SelectedText.Value})

Default

ThisItem.Input1

Set Todropdown:

Items

["","Canada","Mexico","US","UK"]

OnChange

Patch(TripRecord,ThisItem,{Input2:Todropdown.SelectedText.Value})

Default

ThisItem.Input2

3\Add two date picker controls into this gallery(Fromdate/Todate)

Set Fromdate

OnChange

Patch(TripRecord,ThisItem,{Input3:Fromdate.SelectedDate})

DefaultDate

ThisItem.Input3

Set Todate

OnChange

Patch(TripRecord,ThisItem,{Input4:todate.SelectedDate})

DefaultDate

ThisItem.Input4

4\Add an "Add" icon and an "Rubbish-bin" icon

Add icon-OnSelect

Patch(TripRecord,Defaults(TripRecord),{ID:Last(Sort(TripRecord,ID)).ID+1,Input1:Todropdown.SelectedText.Value})

Rubbish-bin icon-OnSelect

Remove(TripRecord,ThisItem)

The principle of my solution is:
1: When adding a new item: Use the Todropdown.SelectedText.Value of the current record as the value of the Input1 field of the new record.
2: When displayed, the default value of the To drop-down box of the new item is the value of Input1, so it will display the Todropdown.SelectedText.Value of the previous record by default

Best Regards,

Bof

[ZenHen]

That worked Bof, Thats a million. @v-bofeng-msft