可以让默认的AppDe域使用某些程序集的影子副本吗?

我不知道你想做什么,但是有一些不推荐的方法可以在当前的appdomain上打开shadowcopy。

AppDomain.CurrentDomain.SetCachePath(@"C:\Cache");
AppDomain.CurrentDomain.SetShadowCopyPath(AppDomain.CurrentDomain.BaseDirectory);
AppDomain.CurrentDomain.SetShadowCopyFiles();

有时不可能修改main()方法代码,因为,例如,您正在编写一个插件,它由一个管理器实例化。

在这种情况下,我建议您将程序集和pdb(以及assemblyResolve事件中的从属程序集)复制到临时位置,并使用assembly.loadFile()从那里加载它们(而不是loadFrom())。

赞成的意见: -没有dll锁定。 -每次重新编译目标程序集时,都可以访问新版本(这就是.loadfile()的原因)。 -整个程序集在appdomain.currentdomain中完全可用。

欺骗: -文件复制是必要的。 -汇编不能卸载,这可能是不方便的,因为资源是免费的。

当做,

警察:这个密码起作用。

/// <summary>
/// Loads an assembly without locking the file
/// Note: the assemblys are loaded in current domain, so they are not unloaded by this class
/// </summary>
public class AssemblyLoader : IDisposable
{
    private string _assemblyLocation;
    private string _workingDirectory;
    private bool _resolveEventAssigned = false;

    /// <summary>
    /// Creates a copy in a new temp directory and loads the copied assembly and pdb (if existent) and the same for referenced ones. 
    /// Does not lock the given assembly nor pdb and always returns new assembly if recopiled.
    /// Note: uses Assembly.LoadFile()
    /// </summary>
    /// <param name="assemblyOriginalPath"></param>
    /// <returns></returns>
    public Assembly LoadFileCopy(string assemblyLocation)
    {
        lock (this)
        {
            _assemblyLocation = assemblyLocation;

            if (!_resolveEventAssigned)
            {
                _resolveEventAssigned = true;

                AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(AssemblyFileCopyResolveEvent);
            }

            //  Create new temp directory
            _workingDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
            Directory.CreateDirectory(_workingDirectory);

            //  Generate copy
            string assemblyCopyPath = Path.Combine(_workingDirectory, Path.GetFileName(_assemblyLocation));
            System.IO.File.Copy(_assemblyLocation, assemblyCopyPath, true);

            //  Generate copy of referenced assembly debug info (if existent)
            string assemblyPdbPath = _assemblyLocation.Replace(".dll", ".pdb");
            if (File.Exists(assemblyPdbPath))
            {
                string assemblyPdbCopyPath = Path.Combine(_workingDirectory, Path.GetFileName(assemblyPdbPath));
                System.IO.File.Copy(assemblyPdbPath, assemblyPdbCopyPath, true);
            }

            //  Use LoadFile and not LoadFrom. LoadFile allows to load multiple copies of the same assembly
            return Assembly.LoadFile(assemblyCopyPath);
        }
    }

    /// <summary>
    /// Creates a new copy of the assembly to resolve and loads it
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="args"></param>
    /// <returns></returns>
    private Assembly AssemblyFileCopyResolveEvent(object sender, ResolveEventArgs args)
    {
        string referencedAssemblyFileNameWithoutExtension = System.IO.Path.GetFileName(args.Name.Split(',')[0]);

        //  Generate copy of referenced assembly
        string referencedAssemblyPath = Path.Combine(Path.GetDirectoryName(_assemblyLocation), referencedAssemblyFileNameWithoutExtension + ".dll");
        string referencedAssemblyCopyPath = Path.Combine(Path.GetDirectoryName(args.RequestingAssembly.Location), referencedAssemblyFileNameWithoutExtension + ".dll");
        System.IO.File.Copy(referencedAssemblyPath, referencedAssemblyCopyPath, true);

        //  Generate copy of referenced assembly debug info (if existent)
        string referencedAssemblyPdbPath = Path.Combine(Path.GetDirectoryName(_assemblyLocation), referencedAssemblyFileNameWithoutExtension + ".pdb");
        if (File.Exists(referencedAssemblyPdbPath))
        {
            string referencedAssemblyPdbCopyPath = Path.Combine(Path.GetDirectoryName(args.RequestingAssembly.Location), referencedAssemblyFileNameWithoutExtension + ".pdb");
            System.IO.File.Copy(referencedAssemblyPath, referencedAssemblyCopyPath, true);
        }

        //  Use LoadFile and not LoadFrom. LoadFile allows to load multiple copies of the same assembly
        return Assembly.LoadFile(referencedAssemblyCopyPath);
    }


    public void Dispose()
    {
        Dispose(true);
    }

    private void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (_resolveEventAssigned)
            {
                AppDomain.CurrentDomain.AssemblyResolve -= new ResolveEventHandler(AssemblyFileCopyResolveEvent);

                _resolveEventAssigned = false;
            }
        }
    }
}

现在有一个用于动态加载/卸载其他插件的插件,这样您就可以在不必重新打开项目的情况下进行更改、重新编译和测试。我在 Building Coder blog . 它附带了revit sdk。