解决 .NET 7 在 Linux 上获取程序集的问题

方案

/// <summary>
/// 获取应用有效程序集
/// </summary>
/// <returns>IEnumerable<Assembly></returns>
private static IEnumerable<Assembly> GetAssemblies()
{
    // 需排除的程序集后缀
    var excludeAssemblyNames = new string[] {
        "Database.Migrations",
    };

    // 获取当前应用程序域中的所有已加载程序集
    var assemblies = AppDomain.CurrentDomain.GetAssemblies().ToList();
    
    // 尝试通过 DependencyContext 获取更多程序集（主要适用于发布为单文件的情况）
    var dependencyContext = DependencyContext.Default;
    if (dependencyContext != null)
    {
        var scanAssemblies = dependencyContext.CompileLibraries
            .Where(lib => lib.Type == "project" ||
                  (lib.Type == "package" && lib.Name.StartsWith("ASPNet.FrameworkLightAPI")) &&
                  !excludeAssemblyNames.Any(j => lib.Name.EndsWith(j)));
        
        foreach (var lib in scanAssemblies)
        {
            try
            {
                var assembly = AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(lib.Name));
                if (!assemblies.Any(a => a.FullName == assembly.FullName))
                {
                    assemblies.Add(assembly);
                }
            }
            catch
            {
                // 忽略加载失败的程序集
                continue;
            }
        }
    }

    return assemblies
        .Where(a => !excludeAssemblyNames.Any(ex => a.FullName.Contains(ex)))
        .Distinct();
}

 

替代方案（更可靠）

private static IEnumerable<Assembly> GetAssemblies()
{
    // 需排除的程序集后缀
    var excludeAssemblyNames = new string[] {
        "Database.Migrations",
    };

    // 获取入口程序集
    var entryAssembly = Assembly.GetEntryAssembly();
    var assemblies = new List<Assembly> { entryAssembly };
    
    // 获取所有引用的程序集
    var referencedAssemblies = entryAssembly.GetReferencedAssemblies();
    
    foreach (var assemblyName in referencedAssemblies)
    {
        try
        {
            var assembly = Assembly.Load(assemblyName);
            if (!excludeAssemblyNames.Any(ex => assembly.FullName.Contains(ex)))
            {
                assemblies.Add(assembly);
            }
        }
        catch
        {
            // 忽略加载失败的程序集
            continue;
        }
    }
    
    return assemblies.Distinct();
}