经过F#团队的一些帮助,我解决了我的问题。这就是我所做的。
namespace Types
open System
open System.Data
open System.IO
open System.Linq
open System.Data.Linq
open Microsoft.FSharp.Data.TypeProviders
open Microsoft.FSharp.Linq
open Microsoft.FSharp.TypeProvider.Emit
open Microsoft.FSharp.Core.CompilerServices
type DatabaseSchema =
SqlDataConnection<"Data Source=(local);Initial Catalog=Test;Integrated Security=SSPI;">
[<TypeProvider>]
type public MeasureTypeProvider(cfg:TypeProviderConfig) as this =
inherit TypeProviderForNamespaces()
let assembly = System.Reflection.Assembly.GetExecutingAssembly()
let typesNamespace = "Types.Domain"
let providedTypeBuilder = ProvidedTypeBuilder.Default
let db = DatabaseSchema.GetDataContext()
let types =
query { for m in db.Table do select m }
|> Seq.map(fun dataEntity ->
let className:string = dataEntity.Identifier
let providedTypeDefinition =
ProvidedTypeDefinition(className = className,
baseType = Some typeof<obj>,
IsErased=false)
providedTypeDefinition.AddMember(
ProvidedConstructor([], InvokeCode = fun [] -> <@@ obj() @@>))
providedTypeDefinition
) |> Seq.toList
let rootType =
let providedTypeDefinition =
ProvidedTypeDefinition(assembly,
typeNamespace,
"DomainTypes",
Some typeof<obj>,
IsErased=false)
providedTypeDefinition.AddMembersDelayed(fun() -> types)
this.AddNamespace(typesNamespace, [providedTypeDefinition])
providedTypeDefinition
let path = Path.GetDirectoryName(assembly.Location) + @"\GeneratedTypes.dll"
do rootMeasureType.ConvertToGenerated(path)
[<assembly:TypeProviderAssembly>]
do()
TypeProvider.Emit框架自动清除生成的程序集。如果你希望它坚持下去,请注意以下声明。其他
File.Delete assemblyFileName
有一个问题是,我发现我的同时能够提供从值类型派生类型(如十进制)时IsErased =真,我无法提供这些派生类型时IsErased =假。这是因为值类型是密封的,所以不可能生成从值类型派生的“真实”类型。
您应该将更新发布为答案。这将有助于未来的游客。 – pad 2012-04-20 17:37:55