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MS Access error when .ToList() is called

See original GitHub issue

I try with access database. It generates error.

Exception message: System.Data.OleDb.OleDbException: 'No value given for one or more required parameters.'
Stack trace:
   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
   at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
   at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)
   at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
   at System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.OleDb.OleDbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)
   at LinqToDB.Data.DataConnection.ExecuteReader(CommandBehavior commandBehavior) in C:\projects\linq2db\Source\LinqToDB\Data\DataConnection.cs:line 1227
   at LinqToDB.Data.DataConnection.QueryRunner.ExecuteReader() in C:\projects\linq2db\Source\LinqToDB\Data\DataConnection.QueryRunner.cs:line 445
   at LinqToDB.Linq.QueryRunner.<ExecuteQuery>d__9`1.MoveNext() in C:\projects\linq2db\Source\LinqToDB\Linq\QueryRunner.cs:line 320
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Hotel.MainUi.btnUpload_Click(Object sender, EventArgs e) in D:\Projects\NET\Armadillo\Hotel\MainUi.cs:line 45
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Hotel.Program.Main() in D:\Projects\NET\Armadillo\Hotel\Program.cs:line 19

    public class Member
    {
        [PrimaryKey, Identity]
        public long ID { get; set; }
        public string Number { get; set; }
        public string Name { get; set; }
        public string Address { get; set; }
        public DateTime Birthdate { get; set; }
        public bool Married { get; set; }
    }

    public class DataContext : LinqToDB.Data.DataConnection
    {
        public DataContext()
            : base("Access", "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\\sugar.mdb;Locale Identifier=1033;Jet OLEDB:Engine Type=5;Persist Security Info=True;Jet OLEDB:Database Password=sugar1109", LinqToDB.Mapping.MappingSchema.Default)
        { }

        public ITable<Member> Members => GetTable<Member>();
    }
	
    private void btnUpload_Click(object sender, EventArgs e)
    {
        var context = new DataContext();
	var models = context.Members.ToList();
    }

Environment details

linq2db version: 2.6.2 Database Server: Microsoft Access Database Provider: Access Operating system: Windows 10 Framework version: .NET Framework 4.6.2

Issue Analytics

State:
Created 5 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

MaceWinducommented, Jan 13, 2019

Did some research - actually access provider generates such error when you query unknown object. E.g. you have typo in column name. So I would recommend to check that your table definition match your mappings

0reactions

MaceWinducommented, Jan 9, 2019

Long (int64) type is not supported by access. Access LONG type is int32 actually

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