从Roslyn生成的汇编中出现ReflectionTypeLoadException。

问题描述 投票：0回答：1

我为这个问题奋斗了好几个小时，但到处都找不到答案。我正在使用Roslyn加载一个文件，将一些代码编译成一个汇编。我已经明确地加载了 MetadataReferences，运行 compilation.Emit并将产生的内存流加载到一个汇编中。但当我尝试 GetTypes() 汇编中，它找不到我明确加载的引用。与单个 GetType(). 该 LoaderExceptions 显示它找错了地方。

private string CompileAndExecuteCodeTest(string inputFileName, string inputFileContent)
{
    var references = new List<MetadataReference> { [removed for brevity, multiple referenced] };

    var sourceLanguage = new CSharpLanguage(references);
    var syntaxTree = sourceLanguage.ParseText(inputFileContent, SourceCodeKind.Regular);
    var assemblyName = Path.GetRandomFileName() + ".generated.dll";

    var compilation = sourceLanguage
        .CreateLibraryCompilation(assemblyName: assemblyName, enableOptimisations: false)
        .AddReferences(references)
        .AddSyntaxTrees(syntaxTree);

    var stream = new MemoryStream();
    var emitResult = compilation.Emit(stream);

    if (emitResult.Success)
    {
        stream.Seek(0, SeekOrigin.Begin);

        var assembly = Assembly.Load(stream.GetBuffer());
        var types = assembly.GetTypes(); //// <<<<<< ERROR HERE

        ...
    }

    ...
}

LoaderException信息。

=== Pre-bind state information ===
LOG: DisplayName = MyTestProject, Version=0.1.0.0, Culture=neutral, PublicKeyToken=null
 (Fully-specified)
LOG: Appbase = file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/
LOG: Initial PrivatePath = NULL
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Users\username\AppData\Local\Microsoft\VisualStudio\16.0_0adcfb3eExp\devenv.exe.config
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PublicAssemblies/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PublicAssemblies/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Microsoft/TestWindow/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Microsoft/TestWindow/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Platform/Debugger/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Platform/Debugger/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/x86/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/x86/MyTestProject/MyTestProject.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PublicAssemblies/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PublicAssemblies/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Microsoft/TestWindow/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Microsoft/TestWindow/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Platform/Debugger/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Platform/Debugger/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/MyTestProject/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/x86/MyTestProject.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/PrivateAssemblies/DataCollectors/x86/MyTestProject/MyTestProject.EXE.
c# roslyn .net-4.7.2 vs-2019
1个回答
0
投票

我最终使用了Ayende Rahien ( ) 的代码。http:/ayende.comlog1376solving theassembly-load-context-problem。)和手动解析 CurrentDomain_AssemblyResolve. 我还是不明白，为什么他们没有自动根据 MetadataReference.CreateFromFile但代码还在工作和编译中。

为了防止有一天它消失了，这里是代码。

public static class AssemblyLocator
{
    static Dictionary<string, Assembly>assemblies;

    public static void Init()
    {
        assemblies = new Dictionary<string, Assembly>();
        AppDomain.CurrentDomain.AssemblyLoad += new AssemblyLoadEventHandler(CurrentDomain_AssemblyLoad);
        AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
    }

    static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
    {
        Assembly assembly = null;
        assemblies.TryGetValue(args.Name, out assembly);
        return assembly;
    }

    static void CurrentDomain_AssemblyLoad(object sender, AssemblyLoadEventArgs args)
    {
        Assembly assembly = args.LoadedAssembly;
        assemblies[assembly.FullName] = assembly;
    }
}
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