4
我正在通過SQLProvider訪問SQLite數據庫。我實際上可以連接到數據庫並查詢表中的數據。但是類型提供程序顯示錯誤:Exception has been thrown by a target of an invocation
。智能感知功能並沒有真正起作用,例如表或屬性不顯示。見截圖:訪問SQLITE數據庫時出現SqlTypeProvider錯誤
由於出現無法訪問VS表和類型顯示試圖訪問屬性(它雖然工作)時lookup on object of indeterminate type
錯誤。從表中提取數據也可以。所以類型提供者可以訪問數據庫但顯示這些錯誤。有沒有辦法讓它正確識別數據庫,並訪問它的屬性等沒有錯誤。
我正在使用64位SQLite驅動程序。下面的代碼:
#if INTERACTIVE
#r @"..\packages\SQLProvider.1.0.8\lib\FSharp.Data.SqlProvider.dll"
#r @"..\packages\System.Data.SQLite.Core.1.0.101.0\lib\net46\System.Data.SQLite.dll"
#r @"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6\System.Data.Linq.dll"
#endif
open System
open FSharp.Data.Sql
[<Literal>]
let connectionString = "Data Source="+ @"C:\tmp\databaseFile.db3"
[<Literal>]
let resolutionPath = __SOURCE_DIRECTORY__ + @"..\..\packages\System.Data.SQLite.Core.1.0.101.0\lib\net46"
type sql = SqlDataProvider<
Common.DatabaseProviderTypes.SQLITE,
ConnectionString = connectionString,
ResolutionPath = resolutionPath,
CaseSensitivityChange = Common.CaseSensitivityChange.ORIGINAL
>
let ctx = sql.GetDataContext()
let table2 = ctx.Main.Table2 //DateTime
let table3 = ctx.Main.Table3 //Text
query {
for r in table3 do
select (r.Date1)
} |> Seq.toList
query {
for r in table2 do
select (r.Date1)
} |> Seq.toList