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Mastering the ‘With’ Function in PowerApps: A Comprehensive Guide

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With(Match(“PT2H1M39S”, “PT(?:(?d+)H)?(?:(?d+)M)?(?:(?d+)S)?”), Time(Value(hours), Value(minutes), Value(seconds)))

8. Creating a New Order and Associated Details

The With function is excellent for handling database-like structures. In this example, the With function is used to wrap a pair of operations related to creating a new order and adding details to that order.

Here’s what is happening:

๐Ÿš€ Creating a New Order: The Patch function creates a new order record in the Orders table with the status “New”. The result of this operation is named and then used in the following steps.

๐Ÿš€ Adding Order Details: Inside the With block, the ForAll function iterates over the NewOrderDetails table. A new record is added to the OrderDetails table for each row in this table.

๐Ÿš€ Referencing Values: Within the Patch function for the OrderDetails, you are using values from the previous steps:

๐Ÿš€ OrderID comes from the result of the first Patch, representing the primary key of the newly created order.

๐Ÿš€ Quantity and ProductID come from the current row in the NewOrderDetails table being processed by ForAll.

With({NewOrder: Patch(Orders, Defaults(Orders), {OrderStatus: “New”})}, ForAll(NewOrderDetails, Patch(OrderDetails, Defaults(OrderDetails), {OrderNumber: NewOrder, Quantity: Quantity, ProductID: ProductID})))

**NOTE**: OrderNumber is a Lookup Column in the Child table NewOrderDetails

9. Comparing Two Records from Different Sources

Compare records from different sources effortlessly:ย 

Here’s what this code does:

๐Ÿš€ Getting a Specific Order: Inside the With function, the Lookup function finds the order with ID “Order123” in the Orders table. The result is assigned to the variable SpecificOrder.

๐Ÿš€ Comparing Columns: Next, inside the With block, an If function compares the columns of SpecificOrder with the currently selected item in Gallery1. In this case, it’s comparing the CustomerID, OrderDate, and TotalAmount columns.

๐Ÿš€ Returning a Result: Depending on the comparison result, the expression returns a string indicating whether the orders are identical.

๐Ÿš€ You can use whatever function in the place of the true or false.

With({SpecificOrder: Lookup(Orders, OrderID = “Order123”)}, If(SpecificOrder.CustomerID = Gallery1.Selected.CustomerID && SpecificOrder.OrderDate = Gallery1.Selected.OrderDate && SpecificOrder.TotalAmount = Gallery1.Selected.TotalAmount, true, false))

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10. Evaluating Process Status and Emailing User

Suppose you have a Processes table that includes information about various ongoing processes, including a Status field and an AssignedTo field containing the email of the responsible user. You want to check a specific process with ProcessID “P123”, evaluate its status, and send an email notification if the status has changed.

Here’s a breakdown of what’s happening:

๐Ÿš€ Getting Process Record: The Lookup function finds the process ID “P123” record in the Processes table. The result is assigned to the variable ProcessRecord. (This can be a dynamic ProcessID)

๐Ÿš€ Evaluating Status: The Switch function evaluates the Status field of ProcessRecord. Depending on the value, it triggers one of the corresponding email-sending functions.

๐Ÿš€ Sending Emails: Theย Office365Outlook.SendEmail functionย sends emails to the user specified in the AssignedTo field of ProcessRecord. The email subject and body are constructed based on the process status.

๐Ÿ“ Note: To use the Office365.SendEmail function requires theย Office 365 Outlook connectorย to properly be configured in your PowerApps.

With({ProcessRecord: Lookup(Processes, ProcessID = “P123”)}, Switch(ProcessRecord.Status, “Completed”, Office365.SendEmail(ProcessRecord.AssignedTo, “Process Completed”, Concatenate(“Process “, ProcessRecord.ProcessID, “has been completed”))))

ย 

11. Adding Checked Gallery Items to a Collection

Integrate checkbox controls within galleries for interactive features: (this can be other controls like toggle and radio controls)

Here’s what’s happening in this code:

๐Ÿš€ Filtering Checked Items: Inside the With function, the Filter function creates a collection of items from the gallery where the checkbox control is checked (Checkbox1.Value = true). This collection is assigned to the variable CheckedItems.

๐Ÿš€ Iterating Through Checked Items: The ForAll function iterates through the CheckedItems collection.

๐Ÿš€ Adding to Collection: Inside the loop, the Collect function adds each checked item to a collection named CollectedProducts. You can specify the fields you want to include in the collection, such as ProductID, ProductName, and Price.

๐Ÿš€ This code segment will result in the CollectedProducts collection containing all the records from the gallery that were checked.

With({CheckedItems: Filter(Gallery1.AllItems, Checkbox1.Value = true)}, ForAll(CheckedItems, Collect(CollectedProducts, {ProductID: ProductID, ProductName: ProductName, Price: Price})))

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Conclusion

Utilizing the With function in Power Apps is a game-changing function that allows developers to be more adaptable, productive, and well-organized in their app’s Power Fx formula development. Take advantage of the examples in this blog to elevate your coding techniques and revolutionize how you approach Power Apps development.

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