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- Declaring a structure
- Using an array of structures
How to use an array of structures?
An array of structures is an Array variable. Each array element is a Structure. For example, an array of structures can be used: - to store an array of order lines.
- to store a list of contacts.
To declare an Array of Structures variable, you must - Declare the structure.
- Declare an array of the structure previously declared.
The syntax is as follows MyStructure is Structure Member1 is <type of variable> Member2 is <type of variable> ... END
MyArray is array of MyStructure For example: stOrderLine is Structure LineNum is int ProductRef is string Qty is int UnitPrice is currency END Â arrOrdLines is array of stOrderLine
Using an array of structures To use an array of structures, you must: - Declare an Array of the structure previously declared.
- Declare a simple variable representing an element of the type of the structure.
- Initialize the members included in this simple variable.
- Add this simple variable to the array.
For example: stOrderLine is Structure LineNum is int ProductRef is string Qty is int UnitPrice is currency END  AnOrdLine is stOrderLine arrOrdLines is array of stOrderLine  // Fill the array  AnOrdLine.LineNum = 1 AnOrdLine.ProductRef = "Ref001" AnOrdLine.Qty = 5 AnOrdLine.UnitPrice = 100.0  ArrayAdd(arrOrdLines, AnOrdLine)  AnOrdLine.LineNum = 2 AnOrdLine.ProductRef = "Ref005" AnOrdLine.Qty = 1 AnOrdLine.UnitPrice = 2100.0  ArrayAdd(arrOrdLines, AnOrdLine)  AnOrdLine.LineNum = 3 AnOrdLine.ProductRef = "Ref019" AnOrdLine.Qty = 16 AnOrdLine.UnitPrice = 22.0  ArrayAdd(arrOrdLines, AnOrdLine)   // Read the array again: method 1  FOR EACH ELEMENT OrdLine OF arrOrdLines Trace(OrdLine.ProductRef, OrdLine.Qty, OrdLine.Qty * OrdLine.UnitPrice)  END   // Read the array again: method 2  FOR nSub =1 TO arrOrdLines.Count Trace(OrdLine[nSub].ProductRef, OrdLine[nSub].Qty, OrdLine[nSub].Qty * OrdLine[nSub].UnitPrice)  END
Remarks The structures and the arrays of structures can be declared: - in the project code (structure global to the entire project).
- in the code of a window or page (structure global to the window or page).
- in any process or event (structure local to the process or event).
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