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Loving data with F#
This document discusses type providers in F#, which allow data sources to be compiled into types for use in F# programs. It provides examples of using various type providers like JSON, XML, and OData to access external data. It also describes how to author custom type providers by using F# code quotations to generate types from a data schema at compile time.
Loving data with F#
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- 2. Valdis Iļjučonoks Technical Fellow,Software Architect Visual Studio ALM evangelist Microsoft MVP http://www.tech-fellow.net | @tech_fellow Geta AS, Tech Fellow Consulting, Latvian .Net UG valdis.iljuconoks@outlook.com
- 3. Loving data withF# Valdis Iļjučonoks
- 5. There are threekinds of lies: lies, damned lies, and statistics. -- Benjamin Disraeli
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- 7. Bring data sourcecloser to program
- 8. Barrier to includedata sources: Need to represent data as types, properties and methods Generated code must be replaced every time service reference is adjusted
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- 10. From 1k feet: Compile-time type provider Erased or generated types approach Data set schema as type info source
- 11. Driven by F#team and community
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- 18. Is it worthto develop custom provider?
- 19. Is schemaavailable? Will provider have enough usage it’s worthwhile to write? Will schema change during coding? Will it change during program execution?
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- 21. Uses F#Code Quotations AddMember() AddMemberDelayed()
- 22. let t =ProvidedTypeDefinition(thisAssembly,namespaceName, "Type" + string n, baseType = Some typeof<obj>) let staticProp = ProvidedProperty(propertyName = "StaticProperty", propertyType = typeof<string>, IsStatic = true, GetterCode = (fun args -> <@@ "Hello!" @@>)) staticProp.AddXmlDocDelayed(fun () -> "This is a static property") t.AddMember staticProp
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- 24. Bring data sourcecloser to program
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