Assembly resolve(自定义加载指定目录的程序集)

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本文介绍如何利用AssemblyResolve事件处理程序，避免将大量DLL放置在主程序目录下造成混乱。通过指定目录加载dll文件，实现程序集的自定义加载。

默认情况下项目引用的dll都需要放在跟主程序相同的目录下，当项目引用的dll越来越多，则会显得凌乱。

这时可以通过AssemblyResolve来处理这件事情。

AppDomain.CurrentDomain.AssemblyResolve += OnCurrentDomainAssemblyResolve;

private Assembly OnCurrentDomainAssemblyResolve(object sender, ResolveEventArgs args)

if(string.IsNullOrWhiteSpace(args.Name))

return null;

string[] assemblyNameSplits = args.Name.Split(',');

if(assemblyNameSplits.Length == 0)

return null;

string name = asemblyNameSplits[0];

if(asemblyNameSplits.Length==3)

string name2= asemblyNameSplits[2];

if(name.EndsWith(".resources") && name2.EndsWith("neutral"))

return null;

else

return LoadAssembly(name);

return LoadAssembly(name);

private Assembly LoadAssembly(string name)

if(assemblyLoadedDic.ContainsKey(name))

return assemblyLoadedDic[name];

else

if(assemblyPathsDic.ContainsKey(name))

string path = assemblyPathsDic[name].AssemblyPath;

Assembly loadedAssembly = Assembly.LoadFile(path);

assemblyLoadedDic[name] = loadedAssembly;

return loadedAssembly;

return null;

根据一个目录，读取目录及子目录下所有dll

private Dictonary<string,AssemblyItem> GetAssemblyPaths(string folderPath)
{

string folder = folderPath;
if(!Path.IsPathRooted(folderPath))

folder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory,folder);

<span style="font-family: Arial, Helvetica, sans-serif;">}</span>

</pre><pre name="code" class="csharp">if(!Directory.Exists(forder))

return null;

</pre><pre name="code" class="csharp">var result = new Dictonary<string,AssemblyItem>();

</pre><pre name="code" class="csharp">string dllfiles = Direcotry.GetFiles(folder,"*.dll",SearchOption.AllDirecotries);

foreach(var dllfile in dllfiles)

string assemblyname = Path.GetFileName(dllfile);

assemblyname = assemblyname.Substring(0,assemblyname.Length - 4);

string assemblyPath = Path.GetFullPath(dllfile);

</pre><pre name="code" class="csharp">var assemblyItem = new AssemblyItem()

AssemblyName = assemblyname,

AssemblyPaht = assemblyPath,

};

</pre><pre name="code" class="csharp">result[assemblyname] = assemblyItem;

</pre><pre name="code" class="csharp">}

</pre><pre name="code" class="csharp">return resutl;

</pre><pre name="code" class="csharp">}