We've got a Windows 8.1 app that we've converted to a Windows 10 UWP app. The app works fine in debug, but when running in Release (.Net Native), we are getting a runtime error on app load. It's not at all clear what's causing the error. The error happens in the OnLaunched event in App.xaml.cs where some data is being initialized. The error:
An exception of type System.NullReferenceException occurred in
System.Private.CoreLib.dll
Additional information: Arg_NullReferenceException
We're using the latest versions of MVVM Light.
I know this isn't a lot of info, but it's really all we have right now and are pretty stumped. Anyone seen and issue like this or know where to start in tracking it down?
If, you're still using SQLite or any Reference.
Please Right Click to your Project => Add => Reference => Make sure your DLL of Nuget is checked.
Please Check this solution.
I had this exact problem in that I converted an 8.1 app to UWP. This was resolved by including a file called Default.rd.xml in the Properties folder. This was not mentioned in the migration guide that I had used.
Not including it means some pretty common coding patterns such as reflection will not work, and this includes in imported .dll's.
A basic Default.rd.xml file looks like the following ...
<!--
This file contains Runtime Directives used by .NET Native. The defaults here are suitable for most
developers. However, you can modify these parameters to modify the behavior of the .NET Native
optimizer.
Runtime Directives are documented at https://go.microsoft.com/fwlink/?LinkID=391919
To fully enable reflection for App1.MyClass and all of its public/private members
<Type Name="App1.MyClass" Dynamic="Required All"/>
To enable dynamic creation of the specific instantiation of AppClass<T> over System.Int32
<TypeInstantiation Name="App1.AppClass" Arguments="System.Int32" Activate="Required Public" />
Using the Namespace directive to apply reflection policy to all the types in a particular namespace
<Namespace Name="DataClasses.ViewModels" Serialize="All" />
-->
<Directives xmlns="http://schemas.microsoft.com/netfx/2013/01/metadata">
<Application>
<!--
An Assembly element with Name="*Application*" applies to all assemblies in
the application package. The asterisks are not wildcards.
-->
<Assembly Name="*Application*" Dynamic="Required All" />
<!-- Add your application specific runtime directives here. -->
</Application>
</Directives>
If this does not work, then try creating a new empty UWP project to get the latest format for the file.
Related
I'm using a package Xamanimation which has a dependency of Xamarin.Forms 4.1.0( written in its nuspec file):
<dependencies>
<group targetFramework=".NETStandard2.0">
<dependency id="Xamarin.Forms" version="4.1.0.581479" exclude="Build,Analyzers" />
</group>
</dependencies>
but I have built the Xamarin.Froms for my own and added the output dll files into my project's reference:
<Reference Include="Xamarin.Forms.Xaml">
<HintPath>..\thirdparty\xforms\Xamarin.Forms.Xaml.dll</HintPath>
</Reference>
according to the nuget's doc, I add the ExcludeAssets attribute(and other tests) to the section of PackageReference of Xamanimation:
<PackageReference Include="Xamanimation">
<IncludeAssets>compile</IncludeAssets>
<!-- <ExcludeAssets>compile</ExcludeAssets> -->
<!-- <PrivateAssets>all</PrivateAssets> -->
<!-- <ExcludeAssets>buildtransitive</ExcludeAssets> -->
<Version>1.3.0</Version>
</PackageReference>
but none of them work!
MSBuild will always use the trasitive dependency Xamarin.Forms.4.1.0 and ignore my own build ones( in which I have add new classes and use them in the main project so the linking failure is indicating the choosen is the old one).
so what's the correct method to exclude the transitive dependency?
I spend a whole day learning into this question and finally got a reasonable answer.
so I'd like to post my first LONG answer in stackoverflow by my poor english.
TL'DR:
the MSBuild's nuget plugin's ResolveNuGetPackageAssets target do the evil thing, make a custom target to revert it, go to bottom for the task code.
Studying story
first, I made a similar but simpler copy of this problem for studying.
after all, building a xamarin project is too slow,
the demo source is in github,
it has four project:
ConflictLib: the library used both by another lib and main application
DirectLib: the library used by main application, and is using ConflictLib
MyAppDev: the main application, with above two library as ProjectReference
MyAppConsumer: the other application, using DirectLib by PackageReference, and ConflictLib as ProjectReference. to test this situation, I pushed the ConflictLib and DirectLib to nuget.org, then made modify to local version of ConflictLib, so I can verify which one is using.
these projects and their relationship are very similar to my origin problem, the key point is : when application use a library with two different version simutanously, will(should) the local one(ProjectReference or HintPath) win?
for my origin case, xamarin project, it's No, so I come to study it.
for the test case, a dotnet core console project, it's Yes, so there must be something mysterious in the building process: MSBuild, which is a huge system, but now I'm going to dig into it.
then, I need a inspecting tool to find out what MSBuild does when building a project.
the simple tool is just invoke it in command line, it will display all the targets executed. a msbuild target is something like a target in makefile, and the tasks in target are similar to commands in makefile, the concept exist with slightly different term in many other system such as gradle, so it's easy to understand.
but, there are so many targets and tasks, and all they depend on others and interactive though Property and Items, it's hard to learn which target break my need from the text log.
fortunately, there's an advanced tool for inspecting everything in MSBuild: it's called MSBuild structured log viewer, I learn it from here.
now build the project with /bl option, it will produce a binary log file with full info, open it by the viewer mentioned above:(my origin xamarin project's build log)
obvious, the ResolveNuGetPackageAssets target changes the Reference items, which decides the final linked library assembly.
but why it doesn't make the wrong decision in the test case? let's view its log:
got the difference? -- there's no ResolveNuGetPackageAssets target!
it's same from ResolveReferences to ResolveAssemblyReferences, but diff in the nuget part.
while double clicking at ResolveAssemblyReferences, the viewer will open the targets file in which the target be defined.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets
it's still same for both case:
ResolveAssemblyReferences doesn't depend on ResolveNuGetPackageAssets, so where does the later come? just click at it, the file opens:
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\NuGet\16.0\Microsoft.NuGet.targets
it overrides ResolveAssemblyReferencesDependsOn and add the ResolveNuGetPackageAssets to dependency of ResolveAssemblyReferences.
the last question: why the above NuGet.targets file not appear in the test case? it could still answered by the viewer's Evaluation section:
clearly, this file is not imported because a property SkipImportNuGetBuildTargets set to true. after a simple search, I confirmed it's the default value in test case: it's set in Microsoft.NET.Sdk.targets. but in xamarin case, it's not set and means false, so all the things happened.
finally, I have to figure out some measures to fix the problem.
first of all, I won't add the SkipImportNuGetBuildTargets property to xamarin project, because I think it's a framework design and maybe has a great impact on others, I just want to fix a little, specific problem.
I decide to add a custom target immediately after the ResolveAssemblyReferences, remove the Nuget's Xamarin.Forms and add my own ones -- just revert what ResolveNuGetPackageAssets does.
the task code is simple (only just after I have written, actually it cost me lot of time to search for grammar/builtin function/etc and test):
notice how the Remove Item(see msbuild doc) works (and not work: the commented lines), I still don't understand it exactly, but it did work!
When trying to open an older solution in VS2017 there is an old Unit Test project that is giving me a problem when building.
I keep getting the following error when building this test project:
Could not load file or assembly 'file:///C:\Projects\MyProj\Test\DAL\UnitTestProj\Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll' or one of its dependencies. The system cannot find the file specified.
I checked the project's references and it appears to be referencing Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll. Additionally there are no code errors. How could I ever figure out if it is one of its dependencies that it can't find?
I had a similar issue (with the additional message The "BuildShadowTask" task failed unexpectedly) with a project originally developed with VS2010, and got to spend the last few hours learning about yet another legacy facet of the build process.
There is a good chance that you are dealing with private accessor files (.accessor), which were deprecated in VS2012 (original source). This was foreshadowed in an announcement from the VS2010 team that they were no longer working on these features.
There is also a chance you're just dealing with erroneous refs to the wrong version of UnitTestFramework, but a NuGet restore should fix this. If not, see this GitHub thread for a possible fix (manually change the ref to the public folder), or move to the new MSTest.TestAdapter and MSTest.TestFramework packages (see MSDN support thread).
Solutions
A. Edit the unit test .csproj and change the item Include references from Shadow => None:
<Shadow Include="Test References\namespace.accessor" /> to
<None Include="Test References\namespace.accessor" />
B. Better yet, simply delete all the .accessor files from the unit test project's Test References folder.
Ideally, you would also rewrite your unit tests to remove references to private methods, either by re-architecting to separate concerns or by changing properties to internal and using "friend" with the InternalsVisibleToAttribute.
For those who need to continue supporting testing of private methods for some reason, the same post provides the following suggestions to the logical question "What is available for me then?":
For those who wish to continue testing internal APIs, you have three options:
Use the Microsoft.VisualStudio.TestTools.UnitTesting.PrivateObject class to assist in accessing internal and private APIs in your code. This is found in the Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll assembly.
Create a reflection framework that would be able to reflect off your code to access internal or private APIs.
If the code you are trying to access is internal, you may be able to access your APIs using the InternalsVisibleToAttribute so your test code can have access to the internal APIs.
However, there is not any good replacement for Code Generation for the new features added by the lanugage teams. You may create the TestMethod stubs and then remove the internal code. You only need to keep the stub itself.
Further reading / sources that helped me piece this together:
VS 2005 ASP.NET explanation of accessors
2008 blog article explaining how to work around this for build servers
MSDN forum thread with discussion on accessor purposes, implementations, and workarounds. Start about 1/3 down.
MSDN BaseShadow docs
MSDN PrivateObject class
Right click the project references folder. Add reference > Assemblies > extensions. Check Microsoft.VisualStudio.QualityTools.UnitTestFramework 10.1, and uncheck any older version.
This is related to Visual studio Enterprise 2015, add new load test was failing: and spiting as "Unable to find assembly 'Microsoft.VisualStudio.QualityTools.LoadTest, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
Due to Assembly installed in public assemblies shows as version 10.0.0.0 which is missed in GAC,
GAC had only 10.1.0.0. Once GAC updated with 10.0.0.0 and restart VS 2015. should resolve the issue similar to this.
Some more detail for better reasoning, System Assembly path and project path
DLL path
......\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\PublicAssemblies\Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll
.CSProj reference version
I had a same issue while I was upgrading project to .Net4.8 in Visual studio 2022 earlier we were using Visual studio 2017.
Error:
The "BuildShadowTask" task could not be loaded from the assembly ***\Microsoft.VisualStudio.TestTools.BuildShadowsTask.dll. Could not load file or assembly 'file:///***Microsoft.VisualStudio.TestTools.BuildShadowsTask.dll' or one of its dependencies.
Solution : I removed ".accessor" files from project as that is being used for accessing private methods(most probably accessor is depricated). Then we used "PrivateObject" class for accessing private members in UnitTest.
Later we updated Unit Test case. Code references could be found from below articles.
Unit test private methods?
Unit Testing: Exposing Private Members
I had a similar issue (compile project in server Jenkins)
Solution:
Include VS.QualityTools.UnitTestFramework to reference project, whit Pakage Manager:
PM>NuGet\Install-Package VS.QualityTools.UnitTestFramework -Version 15.0.27323.2
https://www.nuget.org/packages/VS.QualityTools.UnitTestFramework
Try to fully uninstall Visual Studio 2017 (not repair). Then download the latest version and install it. Remember to check if MSBuild is added to installation files. Remember to delete folder inside Documents: Documents\Visual Studio 2017. In my case, this simple solution fixed all errors.
I have a Web Site with an Service.svc file, i created this using the Add New Item -> AJAX-enabled WCF Service, for weeks, everything works fine.
Today, i imported the EPplus.dll to generate some excel files. When i try to compile i get this error
Error 1 Reference.svcmap:
Failed to generate code for the service reference 'QUAY.Tractebel.COP.Servicos'.
Cannot import wsdl:portType Detail: An exception was thrown while running a WSDL import extension:
System.ServiceModel.Description.DataContractSerializerMessageContractImporter
Error: Type 'OfficeOpenXml.ExcelRangeBase' is a recursive collection data contract which is not supported.
Consider modifying the definition of collection 'OfficeOpenXml.ExcelRangeBase' to remove references to itself.
XPath to Error Source: //wsdl:definitions[#targetNamespace='']/wsdl:portType[#name='Servicos'] App_WebReferences/QUAY/Tractebel/COP/Servicos/
I have no idea how to solve it, someone can help me?
Just had the same problem while referencing a custom wcf class i use.
The strange problem is that on my old development pc (windows vista 32bit, visual studio 2010) i haven't got this problem, it only pops up in my new system (windows 8 64bit).
Bah.
However, i bypassed the problem opening App_WebReferences --> "your service name" --> Right click on depending Refrence icon --> "Configure service reference"
In this screen move the option button from "Reuse types in all referenced assembiles" to "Reuse types in specified assemblies" and check all the depending libraries EXCEPT EPPlus
Compile and ... voila
If someon has also a logic explanation, i'll gladly listen
I have several DNN modules that I wish to update silently, using the portal's built-in module upgrade facilities called from a separate application, in this case a Windows service. I was able to make it all work with version 4.3 of the portal by modifying the DNN source in key areas to allow DotNetNuke.dll to function outside of a web application. I'm now trying to do the same thing with the 4.9.0 source code and I'm having problems.
Everything works fine until DNN tries to read from the database. I have my Windows service project, the DNN library project, and several other related projects loaded in one VS solution (the additional projects are the same ones that are in the main solution file provided with the DNN source). I call PaInstaller.Install in my service to update each module. Execution gets to reflection.vb and then it tries to create a DotNetNuke.Data.SqlDataProvider object based on the type name. It raises an exception when calling System.Web.Compilation.BuildManager.GetType. The exception says:
Could not load type 'DotNetNuke.Data.SqlDataProvider' from assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
I read this to mean it simply couldn't locate the DotNetNuke.SqlDataProvider.dll assembly. What's strange is that assembly is in the Bin folder for the DNN library project, and I also have it in the folder where my Windows service is running. The actual SqlDataProvider project is also loaded in the solution. I can't for the life of me understand why the runtime environment can't locate the assembly.
Has anyone tried something like this before, or know what could cause an assembly not to be found while stepping through the DNN source? Am I better off using something other than BuildManager.GetType to get an instance of the SQL provider type?
Chris,
Honestly depending on your needs, I would look at doing this a different way, as this is going to be very fragile with each DNN upgrade that happens in the future.
I'd look more towards using the "bulk install" option that DNN already has. Have your service upload the module zips to the /install/modules folder, then from there, call /install/install.aspx?mode=installresources and you are done!
If you need a third party solution to parse the results, have your windows service go through and pull the HTML response and parse it to validate success.
I'm currently using Microsoft Code Contracts in an ASP.NET MVC application without any issues but I can not seem to get it quite running in a basic ASP.NET Web site. I'm not entirely sure it was made to work with this type of project (although it shouldn't matter) so I wanted to bring it up to everyone.
I can compile the contracts just fine but the code skips over them since I'm assuming it hasn't been enabled through the Properties Page like you would do in other project types (ie ASP.NET MVC). I've gone to the property page of the project (which displays a dialog instead of the typical properties page) in my ASP.NET web site but it does not yield the same menu options and as such, doesn't have a section devoted to Code Contracts.
Also, I have Microsoft Code Contracts properly enabled within a class library project that I use to separate my business logic from the web site. The contracts compile fine but when a contract is violated, it throws a rather uninformative "Exception of type 'System.ExecutionEngineException' was thrown" error with no inner exception. My contract specifies a message to display upon violation but it is nowhere within the exception. It simply halts the execution of the process (which I believe is the default functionality for Microsoft Code Contracts).
I can't find anywhere that explicitly states that a particular project type can or can't (or shouldn't) be used with Contracts so I just wanted to see if anyone has had this issue.
Thanks for any help!
I had the same problem and this is how I solved it:
In the Referenced Class Libraries, right click -> properties -> code contracts.
Make sure "perform contract checking" is checked. I had mine set to "Full"
Contract Reference Assembly: make sure it is set to "Build"
Save your changes.
In the Referenced Class Libraries that have no contracts in their code, set the Contract Reference Assembly to "Do Not Build".
Then in the MVC project, have the Code Contracts "perform contract checking" checked. I had mine set to "Full".
Hope that helps somebody.
This sounds less like a Contracts and more like a build/config issue. Have you tried to deploy a prebuilt website? Are you sure that your website code sees the contracts code? Is the ASP.NET runtime using the CLR 4.0, or does it see the earlier Microsoft.Contracts.dll? Etc.