用 OData Service 访问 Demographics

用 OData Service 访问 Demographics

// 编译命令

//"C:\Program Files\Microsoft SDKs\F#\3.0\Framework\v4.0\fsc.exe"  --optimize- --tailcalls- --platform:x86 -r:"C:\Program Files\Reference Assemblies\Microsoft\FSharp\3.0\Runtime\v4.0\FSharp.Core.dll" -r:"E:\Projects\F#3\FSharp.Data.TypeProviders.dll"  -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Profile\Client\System.Core.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Profile\Client\System.Data.Services.Client.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Profile\Client\System.dll"  --noframework  TypeProviderDemographics.fsx

#if INTERACTIVE

#r @"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Data.Services.Client.dll";;

#endif

open System.Data.Services.Client;;

#if INTERACTIVE

#r @"E:\Projects\F#3\FSharp.Data.TypeProviders.dll"

#endif

open Microsoft.FSharp.Data.TypeProviders;;

open System.Net;;

[<Generate>]

type Demographics = ODataService<"https://api.datamarket.azure.com/Esri/KeyUSDemographicsTrial/">

let Esri() =

    let db = Demographics.GetDataContext()

    db.Credentials <- System.Net.NetworkCredential("MSN帐号","主帐户密钥")

    let q = query {

        for d in db.demog1 do

        where (d.StateName = "Washington")

        where (d.CountyName = "King County")

        sortBy d.GeographyId

    }

    q |> Seq.filter (fun n -> match n.GeographyName.Trim().ToLower() with

                              | "redmond" -> true

                              | "bellevue" -> true

                              | "kirkland" -> true

                              | _ -> false )

      |> Seq.iter (fun n -> printfn "%A - %A" n.GeographyId n.PerCapitaIncome2010.Value)

Esri()