Linking classes

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  13 years ago

  by ErwinB

  Erwin Bergsma

  Leuven, Belgium

  Joined 15 years ago

  Hi,

  I have a windows-application of which I want to use components to build a web-based application.  One of my key questions at the moment is how to deal with the data.  There are various classes and for each class there is a collection.  Some of the properties refer to other classes/collections.

  I'll give a simplified example below, using some standard/common objects to avoid having to explain the underlying meaning of my data-objects:

  Class SalesPerson with properties like SalesPersonID, and Name.
  Class Order with properties like OrderID, SalesPersonID, Amount, and WhoDidIt.
  

  The property WhoDidIt in the Order-class is effectively a read-only property of the type SalesPerson, that creates a reference to the specific SalesPerson-'record' in the oSalesPersons collection using the SalesPersonID.  It allows you to do something like

  dAmount = oOrder.Item(1).Amount
  sName = oOrder.Item(1).WhoDidIt.Name
  

  Which is very handy in For-Next loops, etc. as it keeps the code nice and tidy.

  When creating the reference, the code refers to the populated collection.  In the Windows-application this is a public variable (e.g. oSalesPersons) defined in the main-form.  So it's easy to refer to: frmMain.oSalesPersons.

  Now the big question: ow to do this in an ASP.Net environment ?  Where do I save / initiate the populated collections so that I can refer to them in my data-structure ?

  Thanks for your help !

  Erwin

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