With .NET Core 3.1 and .NET 5 I tried to reference the TikaOnDotNet NuGet package.
Sample code is as follows.
using System;
using System.IO;
using TikaOnDotNet.TextExtraction;
namespace tika
{
class Program
{
static void Main(string[] args)
{
var textExtractor = new TextExtractor();
var original = new FileInfo(Path.Combine(Directory.GetCurrentDirectory(), #"pptexamples.ppt"));
var wordDocContents = textExtractor.Extract(original.FullName);
}
}
}
In the textExtractor.Extract method it throws below exception.
TikaOnDotNet.TextExtraction.TextExtractionException: "Extraction of text from the file '/Users/serhatonal/Projects/tika/tika/bin/Debug/netcoreapp3.1/pptexamples.ppt' failed." ---> TikaOnDotNet.TextExtraction.TextExtractionException: "Extraction failed." ---> System.MissingMethodException: "Method not found: 'Void System.IO.FileStream..ctor(System.String, System.IO.FileMode, System.Security.AccessControl.FileSystemRights, System.IO.FileShare, Int32, System.IO.FileOptions)'."
at Java_java_io_FileDescriptor.open(String name, FileMode fileMode, FileAccess fileAccess)
at java.io.FileDescriptor.open(String , FileMode , FileAccess )
at java.io.FileDescriptor.open(String , Int32 , Int32 )
at java.io.FileDescriptor.openReadOnly(String )
at Java_java_io_RandomAccessFile.open0(Object _this, String name, Int32 mode, FileDescriptor fd, Int32 O_RDWR)
at java.io.RandomAccessFile.open0(String , Int32 )
at java.io.RandomAccessFile.open(String , Int32 )
at java.io.RandomAccessFile..ctor(File file, String mode)
at java.util.zip.ZipFile..ctor(File file, Int32 mode, Charset charset)
at java.util.zip.ZipFile..ctor(File file, Int32 mode)
at java.util.jar.JarFile..ctor(File file, Boolean verify, Int32 mode)
at java.util.jar.JarFile..ctor(String name)
at IKVM.NativeCode.ikvm.runtime.AssemblyClassLoader.lazyDefinePackages(ClassLoader _this)
at ikvm.runtime.AssemblyClassLoader.lazyDefinePackages()
at ikvm.runtime.AssemblyClassLoader.lazyDefinePackagesCheck()
at ikvm.runtime.AssemblyClassLoader.getPackage(String name)
at java.lang.Package.getPackage(Class )
at java.lang.Class.getPackage()
at org.apache.tika.mime.MimeTypesFactory.create(String coreFilePath, String extensionFilePath, ClassLoader classLoader)
at org.apache.tika.mime.MimeTypes.getDefaultMimeTypes(ClassLoader classLoader)
at org.apache.tika.config.TikaConfig.getDefaultMimeTypes(ClassLoader )
at org.apache.tika.config.TikaConfig..ctor()
at org.apache.tika.config.TikaConfig.getDefaultConfig()
at org.apache.tika.parser.AutoDetectParser..ctor()
at TikaOnDotNet.TextExtraction.Stream.StreamTextExtractor.Extract(Func`2 streamFactory, Stream outputStream)
--- End of inner exception stack trace ---
at TikaOnDotNet.TextExtraction.Stream.StreamTextExtractor.Extract(Func`2 streamFactory, Stream outputStream)
at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](Func`2 streamFactory, Func`3 extractionResultAssembler)
at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](String filePath, Func`3 extractionResultAssembler)
--- End of inner exception stack trace ---
at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](String filePath, Func`3 extractionResultAssembler)
at TikaOnDotNet.TextExtraction.TextExtractor.Extract(String filePath)
at tika.Program.Main(String[] args) in /Users/serhatonal/Projects/tika/tika/Program.cs:16
Even though I found out that issue "System.MissingMethodException: "Method not found: 'Void System.IO.FileStream..ctor(System.String, System.IO.FileMode, System.Security.AccessControl.FileSystemRights, System.IO.FileShare, Int32, System.IO.FileOptions)'."" is considered fixed with the .NET 5 release according to below issue. But the problem still persists.
https://github.com/dotnet/runtime/issues/30435
Anyone having the same issue?
IMVM the basis of the library, as this is a java port, is not dotnet
core compatible.
https://github.com/KevM/tikaondotnet/issues/136#issuecomment-583695410
Unfortunately, this is why.
Related
We have a small ASP.NET Core 3.1 web app. We use itextsharp library (5.5.13) for generating a simple PDF and exporting it.
All works well in debug (and on Windows server), but when published on a Linux server (Debian 10) there is an error generating the PDF:
Error: The document has no pages.
Stack trace:
at iTextSharp.text.pdf.PdfPages.WritePageTree()
at iTextSharp.text.pdf.PdfWriter.Close()
at iTextSharp.text.pdf.PdfDocument.Close()
at iTextSharp.text.Document.Close()
at eDov.Web.Helpers.Reports.Dovolilnice.GetPdfTest() in C:\*\Reports\Dovolilnica.cs:line 173
at eDov.Web.Controllers.DovolilniceController.TestPdf(Int32 id) in C:\*\Controllers\DovolilniceController.cs:line 184
at lambda_method(Closure , Object , Object[] )
at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync() at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)
The code from the controller that is called to generate the PDF:
public IActionResult TestPdf(int id)
{
var file = new Dokument
{
Naziv = string.Format("Dovolilnica - {0}.pdf", id.ToString()),
Extension = ".pdf",
ContentType = "application/pdf",
};
//this is the line that the error from stack trace is referring
file.Contents = Helpers.Reports.Dovolililnice.GetPdfTest();
return File(file.Contents, file.ContentType, file.Naziv);
}
and the code that generates the PDF:
public static byte[] GetPdfTest()
{
byte[] result = null;
// custom velikost nalepke
// 1 inch = 72px
var pgSize = new iTextSharp.text.Rectangle(176f, 135f);
MemoryStream pdfData = new MemoryStream();
iTextSharp.text.Document document = new iTextSharp.text.Document(pgSize, 7.5f, 7.5f, 7.5f, 7.5f);
PdfWriter pdfWriter = PdfWriter.GetInstance(document, pdfData);
pdfWriter.ViewerPreferences = PdfWriter.PageModeUseOutlines;
document.Open();
document.Add(new Paragraph("Create test Pdf Document"));
pdfWriter.CloseStream = false;
document.Close();
//this is the line that the error from stack trace is referring
pdfData.Position = 0;
result = pdfData.ToArray();
pdfData.Dispose();
return result;
}
Has anyone used itextsharp (lower than version 7) successfully when publishing on Linux?
We couldn't get this working on Linux so we tried using iTextSharp.LGPLv2.Core port of the itextsharp library (see: https://github.com/VahidN/iTextSharp.LGPLv2.Core) and it works.
It's also available in Nuget PM.
I've been working on this for the last 3 hours and haven't found a good resource or solution to this problem. I've followed the directions found in Microsoft's documentation to change my ASP.net Privatekey from a string to an int. Since then, I have been presented with the following error:
FormatException: Input string was not in a correct format.
The app will not load past this method in the program.cs class:
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
I have hit a roadblock and any help with this issue would be appreciated.
Asp.net Error Stack:
FormatException: Input string was not in a correct format.
System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type)
ArgumentException: 4c3ccce2-61cd-4315-9cf2-99933f6797ed is not a valid value for Int32. (Parameter 'value')
System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
Stack Query Cookies Headers Routing
FormatException: Input string was not in a correct format.
System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type)
int.Parse(string s, NumberStyles style, IFormatProvider provider)
System.ComponentModel.Int32Converter.FromString(string value, NumberFormatInfo formatInfo)
System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
Show raw exception details
System.FormatException: Input string was not in a correct format.
at System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type)
at System.Int32.Parse(String s, NumberStyles style, IFormatProvider provider)
at System.ComponentModel.Int32Converter.FromString(String value, NumberFormatInfo formatInfo)
at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
ArgumentException: 4c3ccce2-61cd-4315-9cf2-99933f6797ed is not a valid value for Int32. (Parameter 'value')
System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
System.ComponentModel.TypeConverter.ConvertFromInvariantString(string text)
Microsoft.AspNetCore.Identity.UserStoreBase<TUser, TKey, TUserClaim, TUserLogin, TUserToken>.ConvertIdFromString(string id)
Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore<TUser, TRole, TContext, TKey, TUserClaim, TUserRole, TUserLogin, TUserToken, TRoleClaim>.FindByIdAsync(string userId, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.UserManager.FindByIdAsync(string userId)
Microsoft.AspNetCore.Identity.UserManager.GetUserAsync(ClaimsPrincipal principal)
Microsoft.AspNetCore.Identity.SignInManager.ValidateSecurityStampAsync(ClaimsPrincipal principal)
Microsoft.AspNetCore.Identity.SecurityStampValidator.ValidateAsync(CookieValidatePrincipalContext context)
Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationHandler.HandleAuthenticateAsync()
Microsoft.AspNetCore.Authentication.AuthenticationHandler.AuthenticateAsync()
Microsoft.AspNetCore.Authentication.AuthenticationService.AuthenticateAsync(HttpContext context, string scheme)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
Show raw exception details
System.ArgumentException: 4c3ccce2-61cd-4315-9cf2-99933f6797ed is not a valid value for Int32. (Parameter 'value')
---> System.FormatException: Input string was not in a correct format.
at System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type)
at System.Int32.Parse(String s, NumberStyles style, IFormatProvider provider)
at System.ComponentModel.Int32Converter.FromString(String value, NumberFormatInfo formatInfo)
at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
--- End of inner exception stack trace ---
at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
at System.ComponentModel.TypeConverter.ConvertFromInvariantString(String text)
at Microsoft.AspNetCore.Identity.UserStoreBase5.ConvertIdFromString(String id) at Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore9.FindByIdAsync(String userId, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Identity.UserManager1.FindByIdAsync(String userId) at Microsoft.AspNetCore.Identity.UserManager1.GetUserAsync(ClaimsPrincipal principal)
at Microsoft.AspNetCore.Identity.SignInManager1.ValidateSecurityStampAsync(ClaimsPrincipal principal) at Microsoft.AspNetCore.Identity.SecurityStampValidator1.ValidateAsync(CookieValidatePrincipalContext context)
at Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationHandler.HandleAuthenticateAsync()
at Microsoft.AspNetCore.Authentication.AuthenticationHandler`1.AuthenticateAsync()
at Microsoft.AspNetCore.Authentication.AuthenticationService.AuthenticateAsync(HttpContext context, String scheme)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context
I think the problem may be that the login of your previous user may be completed when the ID is a string.
You now change it to int, so now it no longer knows what to do with the string.
I think the simplest solution is that you should delete the cookie, log out and log in again (use int instead).
I have created a project that makes use of Catel, Entity Framework 6 and Syncfusion Community Edition. Specifically I am using the sfDataGrid from Syncfusion.
I have come across an issue that has me completely stumped, maybe someone out there could point me in the right direction.
I have a Catel UserControl with a sfDataGrid in it. The ViewModel has an ObservableCollection (Catel Property) of the data I am using as the ItemsSource for the sfDataGrid. I have filtering enabled on the sfDataGrid. Here is the code for the sfDataGrid:
<sync:SfDataGrid
x:Name="ItemsDataGrid"
ItemsSource="{Binding MyItems, Mode=OneWay}"
SelectedItem="{Binding MyItem, Mode=TwoWay}"
AutoGenerateColumns="False"
AllowFiltering="True"
AllowResizingColumns="True"
GridCopyOption="IncludeHeaders"
GridPasteOption="None"
ShowGroupDropArea="True"
ShowRowHeader="True"
DataFetchSize="50">
<!-- Columns -->
</sync:SfDataGrid>
I add a new Item to the collection on a different view and then I save it to the datacontext and refresh the list:
private async void OnNewMyItemExecute()
{
MyItem= new MyItem();
MyItemsRepository.Add(MyItem);
var myItemsViewModel = TypeFactory
.Default
.CreateInstanceWithParametersAndAutoCompletion<myItemsViewModel >(MyItem); //the construction has parameters for IUIVisualizerService, IPleaseWaitService, etc.
if (await _UIVisualizerService.ShowDialogAsync(myItemsViewModel) ?? true)
{
var myItem= myItemsViewModel.MyItem;
await InitializeAsync();
MyItem = myItem;
}
else
{
_UnitOfWorkService.Rollback(); //just undo some changes
MyItem = null;
}
UnitOfWork.SaveChanges();
}
Creating a new Item is not a problem at all, the thing that is weird is that after I created a new Item and then attempt to filter grid on any column of the sfDataGrid (click the filter button in the column header, a filter popup opens, enter a value in the criteria textbox and click 'OK'), I get this:
MyProject.vshost.exe Warning: 0 : 17:57:49:075 => [WARNING]
[Catel.Services.UIVisualizerService] [8] An error occurred, returning
null since we don't know the result | [TargetInvocationException]
System.Reflection.TargetInvocationException: Exception has been thrown
by the target of an invocation. --->
System.Reflection.TargetInvocationException: Exception has been thrown
by the target of an invocation. ---> System.InvalidCastException:
Unable to cast object of type 'MyProject.Domain.MyItem' to type
'System.Data.Entity.DynamicProxies.MyItem_4CA6F59AB53174892ED9EFBC1D3CC07B862579FC3C5733C6CF4DE857907CFF9C'.
at lambda_method(Closure , MyItem ) --- End of inner exception
stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object
target, Object[] arguments, Signature sig, Boolean constructor) at
System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj,
Object[] parameters, Object[] arguments) at
System.Delegate.DynamicInvokeImpl(Object[] args) at
System.Delegate.DynamicInvoke(Object[] args) at
Syncfusion.Data.QueryableCollectionView.<>c__DisplayClass3.b__1(Object
o) at Syncfusion.Data.QueryableCollectionView.FilterRecord(Object
record) at
Syncfusion.Data.EnumerableRecordsWrapper..ctor(IEnumerable source,
CollectionViewAdv view) at
Syncfusion.Data.EnumerableRecordsWrapper.CreateNew(IEnumerable source,
CollectionViewAdv view) at
Syncfusion.Data.QueryableCollectionView.CreateRecords() at
Syncfusion.Data.CollectionViewAdv.EnsureInitialized() at
Syncfusion.Data.CollectionViewAdv.get_Records() at
Syncfusion.Data.CollectionViewAdv.EnsureRecordsInitialized() at
Syncfusion.Data.CollectionViewAdv.Refresh() at
Syncfusion.Data.QueryableCollectionView.RefreshFilter() at
Syncfusion.Data.CollectionViewAdv.ApplyFilters() at
Syncfusion.Data.CollectionViewAdv.set_FilterPredicates(ObservableCollection1
value) at Syncfusion.UI.Xaml.Grid.GridModel.FilterColumn(GridColumn
column, List1 filterPredicates) at
Syncfusion.UI.Xaml.Grid.GridFilterControl.RefreshFilter() at
Syncfusion.UI.Xaml.Grid.GridFilterControl.b__10(Object
s, RunWorkerCompletedEventArgs e) at
System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs
e) at
System.ComponentModel.BackgroundWorker.AsyncOperationCompleted(Object
arg) at
System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate
callback, Object args, Int32 numArgs) at
System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source,
Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl() at
System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(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.Windows.Threading.DispatcherOperation.Invoke() at
System.Windows.Threading.Dispatcher.ProcessQueue() at
System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32
msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at
MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam,
IntPtr lParam, Boolean& handled) at
MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at
System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate
callback, Object args, Int32 numArgs) at
System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source,
Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at
System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority
priority, TimeSpan timeout, Delegate method, Object args, Int32
numArgs) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd,
Int32 msg, IntPtr wParam, IntPtr lParam) at
MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at
System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame
frame) at
System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Window.ShowHelper(Object booleanBox) at
System.Windows.Window.Show() at System.Windows.Window.ShowDialog()
--- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[]
arguments, Signature sig, Boolean constructor) at
System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj,
Object[] parameters, Object[] arguments) at
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.MethodBase.Invoke(Object obj, Object[]
parameters) at
Catel.Services.UIVisualizerService.<>c__DisplayClass23_0.b__0()
in
C:\CI_WS\Ws\86058\Source\Catel\src\Catel.MVVM\Catel.MVVM.Shared\Services\UIVisualizerService.cs:line
499
This is the method of UIVisualizerService with Line 499:
protected virtual bool? ShowWindow(FrameworkElement window, bool showModal)
{
if (showModal)
{
var showDialogMethodInfo = window.GetType().GetMethodEx("ShowDialog");
if (showDialogMethodInfo != null)
{
// Child window does not have a ShowDialog, so not null is allowed
bool? result = null;
window.Dispatcher.InvokeIfRequired(() =>
{
// Safety net to prevent crashes when this is the main window
try
{
result = showDialogMethodInfo.Invoke(window, null) as bool?; //Line 499
}
catch (Exception ex)
{
Log.Warning(ex, "An error occurred, returning null since we don't know the result");
}
});
return result;
}
Log.Warning("Method 'ShowDialog' not found on '{0}', falling back to 'Show'", window.GetType().Name);
}
I have tried opening MyItemsView with .ShowAsync(), .ShowDialogAsync() and before I upgraded to Catel 4.4 I also used .ShowDialog(), but it made no difference. I could turn Proxy Creation off in EF, but that would cause a lot of changes I have to make in my project (no more lazy loading for me, and that is not an option). I do believe the problem being the new Item I add not being a Dynamic Proxy, and getting it to be a Dynamic Proxy would probably solve the issue, but I have tried loading all the data from the DbContext again, but it also does not solve the problem.
Any advice would be appreciated.
The issue is this:
System.InvalidCastException: Unable to cast object of type 'MyProject.Domain.MyItem' to type 'System.Data.Entity.DynamicProxies.MyItem_4CA6F59AB53174892ED9EFBC1D3CC07B862579FC3C5733C6CF4DE857907CFF9C'.
The reason is, of course, that you are trying to cast a base type to a derived type (which it simply isn't). That this eventually results in the window closing is because an exception happens, but that isn't the real problem.
This exception occurs in the FilterRecord method of the grid. I am not sure if that is something you have written yourself or something that is inside syncfusion, but that is the place to look.
The reason you have generated proxies is because you enabled (or it's enabled by default) the proxy generation of the Entity Framework DbContext.
I've created a new solution in Expression Blend 2013 RC2 and saved it.
I then opened the solution in Visual Studio 2013 RC2 made some changes and saved it. I could open the solution in Expression Blend without any issues.
I then created an F# Portable Library project and re-saved the solution. I can no longer open the solution in Expression Blend as Blend crashes as soon as I open it.
If I attach a debugger it shows a NullReferenceException:
System.NullReferenceException was unhandled
Message: An unhandled exception of type 'System.NullReferenceException' occurred in PresentationFramework.dll
Additional information: Object reference not set to an instance of an object.
and the stack trace is as follows:
> Microsoft.Expression.Project.dll!Microsoft.Expression.Project.ProjectService.OpenSolution(Microsoft.Expression.Utility.IO.DocumentReference solutionOrProjectReference = {Microsoft.Expression.Utility.IO.DocumentReference}, bool addToRecentList, bool openInitialScene) Unknown
Microsoft.Expression.Project.dll!Microsoft.Expression.Project.Commands.OpenRecentProject.Execute() Unknown
Microsoft.Expression.Utility.dll!Microsoft.Expression.Utility.Commands.CommandTarget.ExecuteCommand(string commandName = "Project_OpenRecentProject_1", Microsoft.Expression.Utility.Commands.CommandInvocationSource invocationSource = MenuItem) Unknown
Microsoft.Expression.Framework.dll!Microsoft.Expression.Framework.Commands.CommandService.ExecuteCommand(string commandName = "Project_OpenRecentProject_1", Microsoft.Expression.Utility.Commands.CommandInvocationSource invocationSource = MenuItem) Unknown
Microsoft.Expression.Utility.dll!Microsoft.Expression.Utility.UserInterface.CommandBarButtonBase.Execute.AnonymousMethod__0() Unknown
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown
WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source = {System.Windows.Threading.Dispatcher}, System.Delegate method, object args, int numArgs, System.Delegate catchHandler = null) Unknown
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeImpl() Unknown
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(object state) Unknown
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.Invoke() Unknown
WindowsBase.dll!System.Windows.Threading.Dispatcher.ProcessQueue() Unknown
WindowsBase.dll!System.Windows.Threading.Dispatcher.WndProcHook(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd = 5899532, int msg = 49869, System.IntPtr wParam = 0, System.IntPtr lParam = 0, ref bool handled = false) Unknown
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) Unknown
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown
WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source = {System.Windows.Threading.Dispatcher}, System.Delegate method, object args, int numArgs, System.Delegate catchHandler = null) Unknown
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) Unknown
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd = 5899532, int msg = 49869, System.IntPtr wParam = 0, System.IntPtr lParam = 0) Unknown
[Native to Managed Transition]
[Managed to Native Transition]
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame = {System.Windows.Threading.DispatcherFrame}) Unknown
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) Unknown
WindowsBase.dll!System.Windows.Threading.Dispatcher.Run() Unknown
PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) Unknown
PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) Unknown
PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) Unknown
PresentationFramework.dll!System.Windows.Application.Run() Unknown
Microsoft.Expression.Framework.dll!Microsoft.Expression.Framework.ExpressionApplication.RunApplication() Unknown
Microsoft.Expression.Blend.dll!Microsoft.Expression.Blend.BlendApplication.Start() Unknown
Blend.exe!Microsoft.Expression.Application.Main(string[] args) Unknown
If I remove the F# project. Rebuild and Resave the solution then the solution opens in Blend correctly again.
Is this a known issue?
Is there a workaround to this?
Thanks
EDIT
I didn't add ANY code at all to any of the projects so all the code are simply empty projects with the standard .cs and .fs files you get when you create the solution/project.
I have written a simple SignalR hub:
public void PostUpdate(string message)
{
try
{
var update = URS.Tools.JsonSerializer.DeserializeFromJson<DataUpdate>(message);
switch (update.UpdateType)
{
case DataUpdateType.Opportunity:
Clients.All.UpdateOpportunity(update.DataUpdateId);
break;
case DataUpdateType.Contact:
Clients.All.UpdateContact(update.DataUpdateId);
break;
case DataUpdateType.Client:
Clients.All.UpdateClient(update.DataUpdateId);
break;
}
}
catch (Exception exception)
{
Logger.LogError(exception);
}
}
It is running with a Silverlight 5 client. For the most part it works, but after 5 - 30 minutes I get an error coming from withing the library:
Exception information:
Exception type: FormatException
Exception message: Invalid cursor.
at Microsoft.AspNet.SignalR.Messaging.Cursor.GetCursors(String cursor, Func`2 keyMaximizer)
at Microsoft.AspNet.SignalR.Messaging.DefaultSubscription..ctor(String identity, IEnumerable`1 eventKeys, TopicLookup topics, String cursor, Func`2 callback, Int32 maxMessages, IStringMinifier stringMinifier, IPerformanceCounterManager counters)
at Microsoft.AspNet.SignalR.Messaging.MessageBus.CreateSubscription(ISubscriber subscriber, String cursor, Func`2 callback, Int32 messageBufferSize)
at Microsoft.AspNet.SignalR.Messaging.MessageBus.Subscribe(ISubscriber subscriber, String cursor, Func`2 callback, Int32 maxMessages)
at Microsoft.AspNet.SignalR.Infrastructure.Connection.Receive(String messageId, Func`2 callback, Int32 maxMessages)
at Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessMessages(ITransportConnection connection, Func`1 postReceive, Action`1 endRequest)
When I look at the packets, I cannot see a difference between the one just prior to the error that succeeds and the call that fails. It is running serverEvents transport, but I tried longPolling to no avail.
The exception is happening in the server.
Any ideas what could be causing the above error and/or how to resolve it?