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VahidN / iTextSharp.LGPLv2.Core

iTextSharp.LGPLv2.Core is an unofficial port of the last LGPL version of the iTextSharp (V4.1.6) to .NET Core
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System.Runtime.Loader.AssemblyLoadContext is not available in UWP projects #104

Closed dahovey closed 1 year ago

dahovey commented 2 years ago

Summary of the issue

With UWP project exception occurs when running BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.EMBEDDED) in very simple test project:

System.TypeLoadException: Could not load type 'System.Runtime.Loader.AssemblyLoadContext' from assembly 'System.Runtime.Loader, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
   at iTextSharp.text.pdf.BaseFont.GetResourceStream(String key)
   at iTextSharp.text.pdf.Type1Font..ctor(String afmFile, String enc, Boolean emb, Byte[] ttfAfm, Byte[] pfb, Boolean forceRead)
   at iTextSharp.text.pdf.BaseFont.CreateFont(String name, String encoding, Boolean embedded, Boolean cached, Byte[] ttfAfm, Byte[] pfb, Boolean noThrow, Boolean forceRead)
   at iTextSharp.text.pdf.BaseFont.CreateFont(String name, String encoding, Boolean embedded)
   at ClassLibrary1.Class1.InitializeFont()

Environment

iTextSharp.LGPLv2.Core version: 1.5.0 thru 1.7.5
.NET Core SDK version: N/A
UWP Windows Build: 16299
IDE: Visual Studio 2019 16.11

Example code/Steps to reproduce:

If I create a blank UWP project, reference NuGet System.Runtime.Loader 4.3.0 and call AssemblyLoadContext.Default the above exception occurs.

Interestingly, I have been using version 1.4.5 successfully with UWP. I believe this is because of a try catch (that was later removed starting in version 1.5.0) . See here. After upgrading NuGet package to 1.5.0 an exception occurs because loadProperties within the CjkFont` class does not include try/catch block. Subsequently, when I call FontFactory.GetFont, even with my custom registered font I get the below exception:

System.TypeLoadException: Could not load type 'System.Runtime.Loader.AssemblyLoadContext' from assembly 'System.Runtime.Loader, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
   at iTextSharp.text.pdf.BaseFont.GetResourceStream(String key)
   at iTextSharp.text.pdf.CjkFont.loadProperties()
   at iTextSharp.text.pdf.CjkFont.IsCjkFont(String fontName, String enc)
   at iTextSharp.text.pdf.BaseFont.CreateFont(String name, String encoding, Boolean embedded, Boolean cached, Byte[] ttfAfm, Byte[] pfb, Boolean noThrow, Boolean forceRead)
   at iTextSharp.text.pdf.BaseFont.CreateFont(String name, String encoding, Boolean embedded)
   at SampleApp.ViewModels.DashboardViewModel.<get_OpenPdfCommand>b__26_0()
MestreDosMagros commented 1 year ago

Any news on this?

kurema commented 1 year ago

I have a similar issue. msbuild fails for BaseFont.GetResourceStream(string). This is not BaseFont.CreateFont() so maybe it's off-topic.

  C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\Microsoft.NetNative.targets(809,5): error : Type 'System.Runtime.Loader.AssemblyLoadContext' from assembly 'mscorlib' was not included in compilation, but was referenced in method 'BaseFont.GetResourceStream(string)'. There may have been a missing assembly, or a dependency on a more recent Windows SDK release. [D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\BookViewerApp.csproj]
  C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\Microsoft.NetNative.targets(809,5): error : Type 'System.Runtime.Loader.AssemblyLoadContext' from assembly 'mscorlib' was not included in compilation, but was referenced in method 'BaseFont.GetResourceStream(string)'. There may have been a missing assembly, or a dependency on a more recent Windows SDK release. [D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\BookViewerApp.csproj]
  C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\Microsoft.NetNative.targets(809,5): error : Method 'BaseFont.GetResourceStream(string)' will always throw an exception due to the missing method 'AssemblyLoadContext.get_Default()' in assembly 'System.Runtime.Loader'. There may have been a missing assembly, or a dependency on a more recent Windows SDK release. [D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\BookViewerApp.csproj]
  C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\Microsoft.NetNative.targets(809,5): error : Method 'BaseFont.GetResourceStream(string)' will always throw an exception due to the missing method 'AssemblyLoadContext.get_Default()' in assembly 'System.Runtime.Loader'. There may have been a missing assembly, or a dependency on a more recent Windows SDK release. [D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\BookViewerApp.csproj]
  C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\Microsoft.NetNative.targets(809,5): error : ILT0005: 'C:\Program Files (x86)\Microsoft SDKs\UWPNuGetPackages\runtime.win10-x86.microsoft.net.native.compiler\2.2.12-rel-31116-00\tools\x86\ilc\Tools64\nutc_driver.exe @"D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\obj\x86\Release\ilc\intermediate\MDIL\BookViewerApp.rsp"' returned exit code -1073740791 [D:\a\BookViewerApp3\BookViewerApp3\BookViewerApp\BookViewerApp\BookViewerApp.csproj]

In my case, v1.9.3 works fine. v3.1.0 do not.

But AssemblyLoadContext.Default is always in try{} (v3.3.0 / v1.9.3). I don't know why this happened.