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Anonymous
Not applicable

Gallery when loading shows old items before new items show up

Hi All,

 

I have setup a power app connected to sharepoint.

 

I have 2 button - Screen 1

One gallery - Screen 2

 

Button has a variable when clicked, that variable is used in the Filter query to populate gallery. Clicking on the button 1 takes me to screen2 and populates the gallery based on button 1 variable.

 

Issue is, when i come back to screen 1 and click on button 2, it takes me to screen 2 and shows the gallery items for button 1 for few seconds before populating the gallery with Button 2  variable data.

 

Is there a way i can stop showing old data in gallery when new data is being loaded. Basically looking like resetting the gallery. There is a reset option but i did not find any change when using it.

 

any help is appreciated

 

 

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions

@Anonymous 

Your going to see this type of action with a lot of controls as they have to gather any data needed when they render.

 

My suggestion would be to avoid doing the Filter in the Gallery...do the filter in the button.

 

Example: 

   Button1 OnSelect

    Set(glbGalleryList, Filter(yourDataSource, <criteria>));

    Navigate(Screen2)

 

   Button2 OnSelect

    Set(glbGalleryList, Filter(yourDataSource, <othercriteria>));

    Navigate(Screen2)

 

Next, set the Items property of the Gallery on screen 2 to glbGalleryList

 

Make sure you are NOT switching datasources on the gallery...it needs a consistent schema.

 

PowerApps will "wait" at the set line of your formula for the variable to be populated...so, your Gallery will have its data already in the variable when you arrive at screen2 rather than, when you arrive at screen2, that the Gallery begins to get the data.

 

I hope this is helpful for you.

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View solution in original post

21 REPLIES 21

Hey! 

Having a gallery changing data source is not a good idea. Plus, the filteres take time. My suggestion is for you to have 2 galleries and show them deppending on the ar (just make tem visible or not)

 

 

If you need additional help please tag me in your reply and please like my reply.
If my reply provided you with a solution, pleased mark it as a solution ✔️!

Best regards,
Gonçalo Nogueira

Hi @Anonymous

 

We can refresh the gallery by 

 

Refresh(DataSourceName)

 

2. Use Orderbycolumn or sort to display the latest item at the top.

3. Gallery filter based on variablename. 

 

Anonymous
Not applicable

@Nogueira1306 source is the same. only filter variable changes.

 

example

Button 1 when clicked shows data for Apple

Button 2 when clicked shows data for Orange

 

when i switch between these 2 buttons the previous data shows for a brief moment before loading new data

 

@StalinPonnusamy Refresh may not be ideal as i have multiple gallery.

 

I am already using variable in filter query

Ok. You can always refresh the gallery as @StalinPonnusamy  said

@Anonymous Can you share the code you have in the OnSelect of Button1 & Button2 and Items of the Gallery.

Anonymous
Not applicable

Refreshing a gallary gives me an error "Only managed connection can be refreshed"

@Anonymous You Refresh connections not controls. Controls can be Reset. BTW, Can you share the code you have in theOnSelectof Button1 & Button2 and Items of the Gallery.

Anonymous
Not applicable

@CNT 

Button 1 Set(varReg,ThisItem)

Button 2 Set(varReg,ThisItem)

 

Filter(Programs,RegistrationID=varReg.ID)

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