Access violation reading location 0x00000008

Question

I' am develop a c# wpf Application.

when use a dll for connecting to external hardware , after end this error raise my app in windows 7.

Error:Access violation reading location 0x00000008

 

Application: AccessServer2009.exe

Framework Version: v4.0.30319

Description: The process was terminated due to an unhandled exception.

Exception Info: System.AccessViolationException

at <Module>.SNIOpenSyncExWrapper(SNI_CLIENT_CONSUMER_INFO*, SNI_ConnWrapper**)

at SNINativeMethodWrapper.SNIOpenSyncEx(ConsumerInfo, System.String, IntPtr ByRef, Byte[], Byte[], Boolean, Boolean, Int32, Boolean, Int32, Int32)

at System.Data.SqlClient.SNIHandle..ctor(ConsumerInfo, System.String, Byte[], Boolean, Int32, Byte[] ByRef, Boolean, Boolean, Boolean, System.Data.SqlClient.TransparentNetworkResolutionState, Int32)

at System.Data.SqlClient.TdsParserStateObject.CreatePhysicalSNIHandle(System.String, Boolean, Int64, Byte[] ByRef, Byte[], Boolean, Boolean, Boolean, System.Data.SqlClient.TransparentNetworkResolutionState, Int32)

at System.Data.SqlClient.TdsParser.Connect(System.Data.SqlClient.ServerInfo, System.Data.SqlClient.SqlInternalConnectionTds, Boolean, Int64, Boolean, Boolean, Boolean, Boolean, Boolean, System.Data.SqlClient.SqlAuthenticationMethod)

at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(System.Data.SqlClient.ServerInfo, System.String, System.Security.SecureString, Boolean, System.Data.ProviderBase.TimeoutTimer, Boolean, Boolean)

at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(System.Data.SqlClient.ServerInfo, System.String, System.Security.SecureString, Boolean, System.Data.SqlClient.SqlConnectionString, System.Data.SqlClient.SqlCredential, System.Data.ProviderBase.TimeoutTimer)

at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(System.Data.ProviderBase.TimeoutTimer, System.Data.SqlClient.SqlConnectionString, System.Data.SqlClient.SqlCredential, System.String, System.Security.SecureString, Boolean)

at System.Data.SqlClient.SqlInternalConnectionTds..ctor(System.Data.ProviderBase.DbConnectionPoolIdentity, System.Data.SqlClient.SqlConnectionString, System.Data.SqlClient.SqlCredential, System.Object, System.String, System.Security.SecureString, Boolean, System.Data.SqlClient.SqlConnectionString, System.Data.SqlClient.SessionData, System.Data.ProviderBase.DbConnectionPool, System.String, Boolean)

at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(System.Data.Common.DbConnectionOptions, System.Data.Common.DbConnectionPoolKey, System.Object, System.Data.ProviderBase.DbConnectionPool, System.Data.Common.DbConnection, System.Data.Common.DbConnectionOptions)

at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(System.Data.ProviderBase.DbConnectionPool, System.Data.Common.DbConnection, System.Data.Common.DbConnectionOptions, System.Data.Common.DbConnectionPoolKey, System.Data.Common.DbConnectionOptions)

at System.Data.ProviderBase.DbConnectionPool.CreateObject(System.Data.Common.DbConnection, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal)

at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(System.Data.Common.DbConnection, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal)

at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(System.Data.Common.DbConnection, UInt32, Boolean, Boolean, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal ByRef)

at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(System.Data.Common.DbConnection, System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal ByRef)

at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(System.Data.Common.DbConnection, System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal, System.Data.ProviderBase.DbConnectionInternal ByRef)

at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionFactory, System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions)

at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionFactory, System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions)

at System.Data.SqlClient.SqlConnection.TryOpenInner(System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>)

at System.Data.SqlClient.SqlConnection.TryOpen(System.Threading.Tasks.TaskCompletionSource`1<System.Data.ProviderBase.DbConnectionInternal>)

at System.Data.SqlClient.SqlConnection.Open()

at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<Open>b__36(System.Data.Common.DbConnection, System.Data.Entity.Infrastructure.Interception.DbConnectionInterceptionContext)

at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Dispatch[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon, System.Action`2<System.__Canon,System.__Canon>, System.__Canon, System.Action`3<System.__Canon,System.__Canon,System.__Canon>, System.Action`3<System.__Canon,System.__Canon,System.__Canon>)

at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(System.Data.Common.DbConnection, System.Data.Entity.Infrastructure.Interception.DbInterceptionContext)

at System.Data.Entity.Core.EntityClient.EntityConnection.<Open>b__2()

at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy+<>c__DisplayClass1.<Execute>b__0()

at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Func`1<System.__Canon>)

at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(System.Action)

at System.Data.Entity.Core.EntityClient.EntityConnection.Open()

at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean)

at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Func`1<System.__Canon>, System.Data.Entity.Infrastructure.IDbExecutionStrategy, Boolean, Boolean)

at System.Data.Entity.Core.Objects.ObjectQuery`1+<>c__DisplayClass7[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<GetResults>b__5()

at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Func`1<System.__Canon>)

at System.Data.Entity.Core.Objects.ObjectQuery`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResults(System.Nullable`1<System.Data.Entity.Core.Objects.MergeOption>)

at System.Data.Entity.Core.Objects.ObjectQuery`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0()

at System.Data.Entity.Internal.LazyEnumerator`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext()

at System.Collections.Generic.List`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]..ctor(System.Collections.Generic.IEnumerable`1<System.__Canon>)

at System.Linq.Enumerable.ToList[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Collections.Generic.IEnumerable`1<System.__Canon>)

at AccessServer2009.MainWindow.Button_Click_1(System.Object, System.Windows.RoutedEventArgs)

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)

at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)

at System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs)

at System.Windows.Controls.Primitives.ButtonBase.OnClick()

at System.Windows.Controls.Button.OnClick()

at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(System.Windows.Input.MouseButtonEventArgs)

at System.Windows.UIElement.OnMouseLeftButtonUpThunk(System.Object, System.Windows.Input.MouseButtonEventArgs)

at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)

at System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject, System.Windows.RoutedEventArgs, System.Windows.RoutedEvent)

at System.Windows.UIElement.OnMouseUpThunk(System.Object, System.Windows.Input.MouseButtonEventArgs)

at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)

at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)

at System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)

at System.Windows.Input.InputManager.ProcessStagingArea()

at System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)

at System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport)

at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawMouseActions, Int32, Int32, Int32)

at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr, MS.Internal.Interop.WindowMessage, IntPtr, IntPtr, Boolean ByRef)

at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)

at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)

at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)

at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)

at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)

at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)

at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)

at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)

at System.Windows.Application.RunDispatcher(System.Object)

at System.Windows.Application.RunInternal(System.Windows.Window)

at System.Windows.Application.Run(System.Windows.Window)

at System.Windows.Application.Run()

at AccessServer2009.App.Main()