PowerApps: Pagination when using Dataverse

In this post, I will explain how to do pagination (Next, Previous, First Page) when using Dataverse as a source. This is similar to Model Driven App but in the canvas app.

Background

In some cases, businesses would like to retrieve data page by page. It means 25 or 50 records at a time. This can be configured like the below UI.

Approach

1. Canvas application to invoke and display the data
2. Power Automate to retrieve the data from Dataverse.

Canvas App UI

Overall Flow/Power Automate

Video Demo

https://www.youtube.com/watch?v=wa8ebhbrGCE

Git Repo

https://github.com/AntonyStalin/CanvasApp-Pagination-with-Dataverse

Power Automate Setup

Create a new Instant cloud flow with

• Flow Name: Get Dataverse Using Pagination
• Trigger: PowerApps

Create/Initialize Variables

1. Page Number – To send the following (Next) page number on the request
   • Type: Integer
   • Value: Ask in PowerApps
2. Fetch Count – How many records to retrieve
   • Type: Integer
   • Value: Ask in PowerApps
3. Paging Cookie – Modified version of the original paging cookie, which will be sent as a request
   • Type: String
   • Value: Ask in PowerApps
4. FetchXml Paging Cookie – Dataverse returns the paging cookie as part of the response. This is Raw data and will be used to send a subsequent request.
   • • Type: String
     • Value: if(empty(variables(‘Paging Cookie’)),”,decodeUriComponent(decodeUriComponent(variables(‘Paging Cookie’))))
5. JSON For XML Parsing – This is just a template that used to transform the paging cookie to XML
   • Type: Object
   • Value: { “a”: “”}
6. Compose Paging Cookie
   • Inputs: if(empty(variables(‘FetchXml Paging Cookie’)),”,replace(substring(variables(‘FetchXml Paging Cookie’),add(indexOf(variables(‘FetchXml Paging Cookie’),’pagingcookie=”‘),14)),'” istracking=”False” />’,”))

Get Data from Dataverse

1. Fetch Count: Variable
2. Page Number: Variable
3. If condition: if(equals(variables(‘Page Number’),1),”,concat(‘paging-cookie=”’, substring(first(skip(split(string(xml(setProperty(variables(‘JSON For Xml Parsing’),’a’,outputs(‘Compose_Paging_Cookie’)))),'<‘),1)),2),””))

Response

Make sure to create “Response Body JSON Schema” by clicking “Generate from sample” and paste the body content

 

Canvass Application Setup

Add the Power Automate flow (Above created) to the app

Set the Items property of the Fetch count (Dropdown) to

[25,50,100,500,1000,5000]

Set the OnSelect property of the Retrieve button to

UpdateContext({PageNumber: 1});
Set(
colGetDataVerse,
GetDataverseUsingPagination.Run(
ddlFetchCount.Selected.Value,
PageNumber,
“”
)
);

Set Items property of the Gallery to

colGetDataVerse.value

Set the Onselect property of the next page (Right Arrow) to

UpdateContext({PageNumber: PageNumber + 1});
Set(
colGetDataVerse,
GetDataverseUsingPagination.Run(
ddlFetchCount.Selected.Value,
PageNumber,
colGetDataVerse.’@Microsoft.Dynamics.CRM.fetchxmlpagingcookie’
)
)

Set the Color property of the next page (Right Arrow) to

If(
colGetDataVerse.’@Microsoft.Dynamics.CRM.morerecords’,
RGBA(0, 18, 107, 1),
DarkGray
)

Set the DisplayMode property of the next page (Right Arrow) to

If(
colGetDataVerse.’@Microsoft.Dynamics.CRM.morerecords’,
DisplayMode.Edit,
DisplayMode.View
)

Set the OnSelect property of the Previous page (Left Arrow) to

UpdateContext({PageNumber: PageNumber – 1});
Set(
colGetDataVerse,
GetDataverseUsingPagination.Run(
ddlFetchCount.Selected.Value,
PageNumber,
colGetDataVerse.’@Microsoft.Dynamics.CRM.fetchxmlpagingcookie’
)
)

Set the Color property of the previous page (Left Arrow) and First Page to

If(
PageNumber > 1,
RGBA(0, 18, 107, 1),
DarkGray
)

Set the DisplayMode property of the previous page (Left Arrow) and First Page to

If(
PageNumber > 1,
DisplayMode.Edit,
DisplayMode.View
)

Set the OnSelect property of the First page to

 UpdateContext({PageNumber: 1});
Set(
colGetDataVerse,
GetDataverseUsingPagination.Run(
ddlFetchCount.Selected.Value,
PageNumber,
“”
)
)

Set the Text property of the Lable (Page Number) to

“Page ” & PageNumber

Conclusion

Using Power automate we able to do pagination using Paging Cookie.

Enjoy Development!!!