Dropdown reset itself after selection caused by patch in OnChange-property

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Posted on 30 Sep 2022 10:08:08 by TQEUser

Hi everybody,

haven't found an answer yet.

I am using a dropdown control in a gallery to update values to ThisItem.
These values are then saved with a button "save" in a collection "colFragenToSave" (also in ThisItem).
The button should be disabled as long as no selection has been made.
In the collection I added a column called "SaveVisible" which returns true or false and thus controls the DisplayMode.

I put the OnChange-property of this dropdown to:

Patch(colFragenToSave;ThisItem;{SaveVisible:true})

The button then is in DisplayMode.Edit, but the selection of the dropdown felt back to default - what it shouldn't do.

Hope U understand my problem 🙂

What am I doing wrong?

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Dropdown.png

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Knoll-TQEUser 7 on 10 Oct 2022 at 07:01:22

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Re: Dropdown reset itself after selection caused by patch in OnChange-property

Hi,
I've solved it by a workaround:
When I navigate to that screen, I set a variable for the Default-property to " " (which means empty). With the Patch-function of the OnChange-Property from the Dropdown, I set this variable to the dropdown.selected.value.

Works fine 😉
Knoll-TQEUser 7 on 04 Oct 2022 at 05:32:55

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Re: Dropdown reset itself after selection caused by patch in OnChange-property

sure 🙂
In "Gallery.png" you can see the whole screen. The others show what happens.

Hope that helps...

AfterChoose.png

Gallery.png

SaveActive.png
Manan-Malhotra 621 Super User 2024 Season 1 on 04 Oct 2022 at 05:17:56

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Re: Dropdown reset itself after selection caused by patch in OnChange-property

Sorry I didn't clearly get what is the issue being faced by you?
Could you share multiple screenshots of the issues being faced by you?
@Knoll-TQEUser
Knoll-TQEUser 7 on 04 Oct 2022 at 04:28:23

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Re: Dropdown reset itself after selection caused by patch in OnChange-property

thanks for your prompt answer @Manan-Malhotra .

I've set everything you've mentioned. Now in the whole gallery the Save-Button is active - it only should be at "ThisItem". (That's the reason, why I try to force it within the collection.) Also the Dropdowns of all questions (or ThisItem) is set to the first selected.

Any other suggestions?
Maybe I describe more background:
I try to create an Audit-App for suppliers. In one collection I store the questions, in the gallery the purchaser give the answer a rate, add a note and hit the Save-Button to save the results in an other collection. (Everything also works as an offline-app)
here the code for the OnSelect-Property of the save-button:

If(ThisItem.Farbe=White; //if background color eq white means it's a new question to save - else Lookup in Results for the saved results. Farbe = own column in the collection
Patch(colResults;Defaults(colResults);{AuditIdentify:First(colLieferantGewählt).Lieferantennr&Text(Now();"[$-en]ddmmyy");Bewertung:Value(Dropdown3_1.Selected.Value);ErgEbeneOKat:ThisItem.EbeneOKat;ErgEbeneUKat:ThisItem.EbeneUKat;ErgOberKat:ThisItem.OberKat;ErgUnterKat:ThisItem.UnterKat;FragID:ThisItem.ID;Frage:ThisItem.Frage;Gewichtung:Value(Dropdown1_1.Selected.Value);'zur Kenntnis genommen':DataCardValue16_1.Value;LiefIDKredListe:First(colLieferantGewählt).ID; Notiz:TextInput1_1.Text;Title:First(colLieferantGewählt).Lieferantennr });
Patch(colResults;LookUp(colResults;FragID=ThisItem.ID);{AuditIdentify:First(colLieferantGewählt).Lieferantennr&Text(Now();"[$-en]ddmmyy");Bewertung:Value(Dropdown3_1.Selected.Value);ErgEbeneOKat:ThisItem.EbeneOKat;ErgEbeneUKat:ThisItem.EbeneUKat;ErgOberKat:ThisItem.OberKat;ErgUnterKat:ThisItem.UnterKat;FragID:ThisItem.ID;Frage:ThisItem.Frage;Gewichtung:Value(Dropdown1_1.Selected.Value);'zur Kenntnis genommen':DataCardValue16_1.Value;LiefIDKredListe:First(colLieferantGewählt).ID; Notiz:TextInput1_1.Text;Title:First(colLieferantGewählt).Lieferantennr }));;
If(And(DataCardValue16_1.Value;Dropdown3_1.Selected.Value=" "); // Change Backgroundcolor of ThisItem
Patch(colFragenToSave;ThisItem;{Farbe:RGBA(220; 220; 220; 1);IsChosen:false});
Patch(colFragenToSave;ThisItem;{Farbe:RGBA(166; 166; 166; 1);IsChosen:false}));;
Set(varFragenBeantwortet;CountIf(colFragenToSave;!IsChosen));;
If(varAnzahlFragen=varFragenBeantwortet;Set(varPopupFertig;true));; //Gives a Popup after all questions been answered
SaveData(colFragenToSave;"SavedFragenkatalog");;SaveData(colErgebnisse;"SavedErgebnisse")

The save-button should be disabled as long as either Dropdown3_1 or toggle "zur Kenntnis genommen" wasn't used.

Puuhh. difficult to describe if you're mothertounge is not english 😄 so sorry for that.
Manan-Malhotra 621 Super User 2024 Season 1 on 30 Sep 2022 at 11:47:13

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Re: Dropdown reset itself after selection caused by patch in OnChange-property

On the Visible property of save button use this code
If(IsBlank(Dropdown_Name),false,true)
On the advance properties of dropdown select "AllowEmptySelection"=true
Also, set the Default value to Blank() for drowdown from advances settings

Remove other codes, no need for collection in this scenario

Hopefully this helps