cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
paulinuk
Post Patron
Post Patron

Cannot get dropdown to show values from a collection

Hello

 

I need to have a dropdown populate its items from a collection

 

I have a Sharepoint list - Site where the name of a Site is stored in Title

 

So I load this into a collection.  This list has 

 

ClearCollect(
SiteCollection,
Site
);

 

My edit form has a variable with the property SiteName

 

This is a lookup and so is shown as a dropdown 

 

What do I set Items, DisplayName and DisplayValue to?

 

paulinuk_0-1643698774550.png

 

This complains saying that Title is not valid 

 

If I set it to just SiteCollection it doesn't work either?

 

Please can someone help?

 

Cheers

 

Paul

2 ACCEPTED SOLUTIONS

Accepted Solutions
WarrenBelz
Super User
Super User

Hi @paulinuk ,

Make the collection

ClearCollect(
   SiteCollection,
   Site.Title
);

Then the Items of the dropdown

SiteCollection

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

 

View solution in original post

@paulinuk ,

OK - if you must use Lookup columns, just be prepared for the grief (also beyond this) they at times cause in Power Apps (I have not used them in many years).

A Lookup field is actually a Table containing two fields - Value and Id. The first is simply the value you have chosen, but the second is the ID (note the capitalisation of these two) of the value looked up in the other list. When you patch back to the primary list, the Id is actually the element you need to get right.

The syntax is

LookupFieldName: {Value:TextValueHere, Id:NumberValueHere}

obviously used in conjunction with patching the rest of the fields.

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

 

 

View solution in original post

13 REPLIES 13
WarrenBelz
Super User
Super User

Hi @paulinuk ,

Make the collection

ClearCollect(
   SiteCollection,
   Site.Title
);

Then the Items of the dropdown

SiteCollection

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

 

Thanks this now makes the box have the expected items

 

However, when I have the form in add mode and select an entry from the list and post back to sharepoint the sitename is not filled?  

 Patch(
'Issue List',
ShowColumns(
Filter(
IssuesToBeAdded,
ID in colUnsavedRecords.ID
),
"ID",
"Title",
"Description",
"InternalID",
"SiteName"
);
);

@paulinuk ,

That is totally unrelated to your post question (and involves a different field to the one addressed there)

Patch(
   'Issue List',
   ShowColumns(
      Filter(
         IssuesToBeAdded,
         ID in colUnsavedRecords.ID
       ),
      "ID",
      "Title",
      "Description",
      "InternalID",
      "SiteName"
   )
);

When you do a Patch with this structure, all the "ShowColumns" fields need to "line up" with those in the data source in name and field type. For a test, put this on a button/icon

ClearCollect(
   colTest,
   Filter(
      IssuesToBeAdded,
      ID in colUnsavedRecords.ID
    ),
   "ID",
   "Title",
   "Description",
   "InternalID",
   "SiteName"
)

and see what is in SiteName  in the collection and if that matches the field in your IssuesToBeAdded list.

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

paulinuk
Post Patron
Post Patron

ok thanks I will take a look 

 

SiteName in IssuesToBeAdded is a lookup column to the Site list in Sharepoint

 

Do I have to do something different because of that?

@paulinuk ,

Absolutely - you cannot patch in that structure. You will need to go back to a "traditional" patch and include the Id and Value of the Lookup column (you are way better off without this column type unless you want to interact with SharePoint directly with it)

paulinuk
Post Patron
Post Patron

Hello

 

What do you mean include the id and name?

 

How would I replace my patch with this approach?

 

I am interacting directly with sharepoint

 

I have security on the sites list so I am using this to secure the diary entries because I know that if a user accesses the app their sharepoint access will not populate the site name so I can use this to exclude entries the user cannot have access fk


Paul

@paulinuk ,

OK - if you must use Lookup columns, just be prepared for the grief (also beyond this) they at times cause in Power Apps (I have not used them in many years).

A Lookup field is actually a Table containing two fields - Value and Id. The first is simply the value you have chosen, but the second is the ID (note the capitalisation of these two) of the value looked up in the other list. When you patch back to the primary list, the Id is actually the element you need to get right.

The syntax is

LookupFieldName: {Value:TextValueHere, Id:NumberValueHere}

obviously used in conjunction with patching the rest of the fields.

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

 

 

ok thanks 

 

What problems can happen with lookup fields?

 

Could these cause apps to be unreliable running offline?  

 

As posted previously I have an issue where sometimes when running offline the buttons on my app do nothing

 

I will mark the post above as a solution for this issue

Hi @paulinuk ,

They are a historical field type (SharePoint has been around a lot longer than Power Apps) that was designed with the SharePoint/InfoPath interface in mind. They are (as I mentioned) a complex field type with one of the elements (Id) coming from another list. You will have issues writing back on anything other than a combo box based purely on the standard choices, and (among other things) you cannot sort or group by them in a Delegable manner.

The real point however is that you can do exactly the same lookup in Power apps and store the result in a Single Line of Text and then everything (that can) becomes Delegable and much simpler to read from and write to.

Helpful resources

Announcements

Power Platform Connections - Episode 7 | March 30, 2023

Episode Seven of Power Platform Connections sees David Warner and Hugo Bernier talk to Dian Taylor, alongside the latest news, product reviews, and community blogs.     Use the hashtag #PowerPlatformConnects on social media for a chance to have your work featured on the show.     

Announcing | Super Users - 2023 Season 1

Super Users – 2023 Season 1    We are excited to kick off the Power Users Super User Program for 2023 - Season 1.  The Power Platform Super Users have done an amazing job in keeping the Power Platform communities helpful, accurate and responsive. We would like to send these amazing folks a big THANK YOU for their efforts.      Super User Season 1 | Contributions July 1, 2022 – December 31, 2022  Super User Season 2 | Contributions January 1, 2023 – June 30, 2023    Curious what a Super User is? Super Users are especially active community members who are eager to help others with their community questions. There are 2 Super User seasons in a year, and we monitor the community for new potential Super Users at the end of each season. Super Users are recognized in the community with both a rank name and icon next to their username, and a seasonal badge on their profile.    Power Apps  Power Automate  Power Virtual Agents  Power Pages  Pstork1*  Pstork1*  Pstork1*  OliverRodrigues  BCBuizer  Expiscornovus*  Expiscornovus*  ragavanrajan  AhmedSalih  grantjenkins  renatoromao    Mira_Ghaly*  Mira_Ghaly*      Sundeep_Malik*  Sundeep_Malik*      SudeepGhatakNZ*  SudeepGhatakNZ*      StretchFredrik*  StretchFredrik*      365-Assist*  365-Assist*      cha_cha  ekarim2020      timl  Hardesh15      iAm_ManCat  annajhaveri      SebS  Rhiassuring      LaurensM  abm      TheRobRush  Ankesh_49      WiZey  lbendlin      Nogueira1306  Kaif_Siddique      victorcp  RobElliott      dpoggemann  srduval      SBax  CFernandes      Roverandom  schwibach      Akser  CraigStewart      PowerRanger  MichaelAnnis      subsguts  David_MA      EricRegnier  edgonzales      zmansuri  GeorgiosG      ChrisPiasecki  ryule      AmDev  fchopo      phipps0218  tom_riha      theapurva  takolota     Akash17  momlo     BCLS776  Shuvam-rpa     rampprakash  ScottShearer     Rusk  ChristianAbata     cchannon  Koen5     a33ik   Heartholme     AaronKnox        Matren        Alex_10        Jeff_Thorpe        poweractivate        Ramole        DianaBirkelbach        DavidZoon        AJ_Z        PriyankaGeethik        BrianS        StalinPonnusamy        HamidBee        CNT        Anonymous_Hippo        Anchov        KeithAtherton        alaabitar        Tolu_Victor        KRider        sperry1625        IPC_ahaas      zuurg    rubin_boer   cwebb365   Dorrinda   G1124   Gabibalaban   Manan-Malhotra   jcfDaniel   WarrenBelz   Waegemma      If an * is at the end of a user's name this means they are a Multi Super User, in more than one community. Please note this is not the final list, as we are pending a few acceptances.  Once they are received the list will be updated. 

Microsoft Power Platform Conference | Registration Open | Oct. 3-5 2023

We are so excited to see you for the Microsoft Power Platform Conference in Las Vegas October 3-5 2023! But first, let's take a look back at some fun moments and the best community in tech from MPPC 2022 in Orlando, Florida.   Featuring guest speakers such as Charles Lamanna, Heather Cook, Julie Strauss, Nirav Shah, Ryan Cunningham, Sangya Singh, Stephen Siciliano, Hugo Bernier and many more.   Register today: https://www.powerplatformconf.com/   

Check out the new Power Platform Communities Front Door Experience!

We are excited to share the ‘Power Platform Communities Front Door’ experience with you!   Front Door brings together content from all the Power Platform communities into a single place for our community members, customers and low-code, no-code enthusiasts to learn, share and engage with peers, advocates, community program managers and our product team members. There are a host of features and new capabilities now available on Power Platform Communities Front Door to make content more discoverable for all power product community users which includes ForumsUser GroupsEventsCommunity highlightsCommunity by numbersLinks to all communities Users can see top discussions from across all the Power Platform communities and easily navigate to the latest or trending posts for further interaction. Additionally, they can filter to individual products as well.       Users can filter and browse the user group events from all power platform products with feature parity to existing community user group experience and added filtering capabilities.     Users can now explore user groups on the Power Platform Front Door landing page with capability to view all products in Power Platform.    Explore Power Platform Communities Front Door today. Visit Power Platform Community Front door to easily navigate to the different product communities, view a roll up of user groups, events and forums.

Welcome to the Power Apps Community

Welcome! Congratulations on joining the Microsoft Power Apps community! You are now a part of a vibrant group of peers and industry experts who are here to network, share knowledge, and even have a little fun! Now that you are a member, you can enjoy the following resources:   The Microsoft Power Apps Community Forums If you are looking for support with any part of Microsoft Power Apps, our forums are the place to go. They are titled "Get Help with Microsoft Power Apps " and there you will find thousands of technical professionals with years of experience who are ready and eager to answer your questions. You now have the ability to post, reply and give "kudos" on the Power Apps community forums! Make sure you conduct a quick search before creating a new post because your question may have already been asked and answered!   Microsoft Power Apps IdeasDo you have an idea to improve the Microsoft Power Apps experience, or a feature request for future product updates? Then the "Power Apps Ideas" section is where you can contribute your suggestions and vote for ideas posted by other community members. We constantly look to the most voted Ideas when planning updates, so your suggestions and votes will always make a difference.   Community Blog & NewsOver the years, more than 600 Power Apps Community Blog Articles have been written and published by our thriving community. Our community members have learned some excellent tips and have keen insights on building Power Apps. On the Power Apps Community Blog, read the latest Power Apps related posts from our community blog authors around the world. Let us know if you would like to become an author and contribute your own writing — everything Power Apps related is welcome!   Power Apps Samples, Learning and Videos GalleriesOur galleries have a little bit of everything to do with Power Apps. Our galleries are great for finding inspiration for your next app or component. You can view, comment and kudo the apps and component gallery to see what others have created! Or share Power Apps that you have created with other Power Apps enthusiasts. Along with all of that awesome content, there is the Power Apps Community Video & MBAS gallery where you can watch tutorials and demos by Microsoft staff, partners, and community gurus in our community video gallery.   Again, we are excited to welcome you to the Microsoft Power Apps community family! Whether you are brand new to the world of process automation or you are a seasoned Power Apps veteran. Our goal is to shape the community to be your ‘go to’ for support, networking, education, inspiration and encouragement as we enjoy this adventure together!   Let us know in the Community Feedback if you have any questions or comments about your community experience.To learn more about the community and your account be sure to visit our Community Support Area boards to learn more! We look forward to seeing you in the Power Apps Community!The Power Apps Team

Top Solution Authors
Top Kudoed Authors
Users online (7,399)