Though Power Apps doesn't has ability to call any web services / rest apis, it provided easy way to integrate with Flows, thus if we have any complex logic to be executed in the form, we can call a Flow with configured input parameters and the Flow executes the logic and provides response output parameters.
Creation of PowerApps Supported Flow
- Create a Flow of type "Instant - from Blank" and in the trigger, select Power Apps,
- Now, for any input parameter that required from PowerApps, click on any action and from Add Dynamic content window, select Ask in PowerApps from Manual section. We refer to as many input parameters we want and all would be in string.
- Build your logic using input values
- Finally, to respond back with output values, use Respond to a PowerApp or Flow action. This action would provide an ability to add any number of Output values of different types.
- Save the flow.
Creation of PowerApp and integrating the above Flow
- Create an App or through any Sharepoint List, click on customize forms. I used Sharepoint list here
- Select the Screen Control and go to On Visible property, in the function pane, click on Action tab and choose Power Automate. A subscreen pops up with list of available Flows. Click on the Flow we want to call.
- Once we click on it, it adds a Method to call the Flow and it highlights shows the input parameters to fill in.
- Here i set the output of Flow response to a variable and referred it in couple of label texts
- Save the PowerApp and publish it. Once we load the form, we can see the responses on screen
Few important observations are as below
- Boolean output is not coming up in the PowerApp. Better we use string type and compare it
- For date field, PowerApps is considering as a string.
- On a high note, though we have different data types for output, if we want to sue in powerApps, better we use string type and convert them
No comments:
Post a Comment