我使用Visual Basic在Visual Studio 2015中工作。我使用Npgsql连接到PostgreSql数据库。 Array数据类型似乎有问题 - 或者希望我做错了什么。我的一些代码：
Dim aWriter As Npgsql.NpgsqlBinaryImporter
Dim Keys() As String
N_Domain = UBound(myKey_Name, 1)
N_Record = UBound(myKey_Name, 2)
ReDim Keys(0 To N_Domain - 1)
aWriter = Connect.BeginBinaryImport _
("COPY ""GAMS Sets"" FROM STDIN (FORMAT BINARY)")
For Rec = 1 To N_Record
For Dom = 1 To N_Domain
Keys(Dom - 1) = myKey_Name(Dom, Rec)
Next Dom
aWriter.StartRow()
aWriter.Write(myCase, NpgsqlDbType.Text)
aWriter.Write(SyId, NpgsqlDbType.Text)
aWriter.Write(Keys, NpgsqlDbType.Array Or NpgsqlDbType.Text)
Next Rec
aWriter.Dispose()
aWriter.Close()
当我运行代码时，我在aWriter.Dispose（）时遇到错误： {“42804：错误的元素类型”}，ErrorCode：-2147467259。
有什么问题？是不是支持文本阵列？
错误详情：
Npgsql.PostgresException was unhandled
BaseMessage=wrong element type
Code=42804
ErrorCode=-2147467259
File=arrayfuncs.c
HResult=-2147467259
InternalPosition=0
Line=1306
Message=42804: wrong element type
MessageText=wrong element type
Position=0
Routine=array_recv
Severity=ERROR
Source=Npgsql
SqlState=42804
[Where]=COPY GAMS Sets, line 1, column Keys
StackTrace:
at Npgsql.NpgsqlConnector.DoReadMessage(DataRowLoadingMode dataRowLoadingMode, Boolean isPrependedMessage)
at Npgsql.NpgsqlConnector.ReadMessageWithPrepended(DataRowLoadingMode dataRowLoadingMode)
at Npgsql.NpgsqlConnector.ReadExpecting[T]()
at Npgsql.NpgsqlBinaryImporter.Close()
at Npgsql.NpgsqlBinaryImporter.Dispose()
at ConsoleApplication1.Module1.HVL_Write_Set(String myCase, Int32 SyNr, String SyId, Int32 Dimen, String[] myDomain_Name, String[,] myKey_Name) in \\dtu-storage\hela\Documents\Visual Studio 2015\Projects\GDX API 5\GDX API 5\Module1.vb:line 305
at ConsoleApplication1.Module1.Main() in \\dtu-storage\hela\Documents\Visual Studio 2015\Projects\GDX API 5\GDX API 5\Module1.vb:line 638
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: