/// <summary>
/// 随着项目规模的逐渐扩大，项目引用的dll也越来越多，这些dll默认情况下全部都需要放在跟主程序相同的目录下，
/// dll一多，主程序的目录就会显得非常凌乱。那么有没有什么办法可以把dll放到其他目录下也能正确加载呢，答案是肯定的，就是利用AppDomain的AssemblyResolve事件。
/// AssemblyResolve事件在.Net对程序集的解析失败时触发，返回一个Assembly对象。因此，我们只要在这个事件的处理程序里手动加载对应目录的dll，
/// 并把对应dll的Assembly对象返回，.Net就能正确加载对应的dll了。
/// 使用AssemblyResolve事件除了本文介绍的，能在任意目录加载程序集外，应该还可以从其他特殊的地方加载程序集
/// </summary>
/// <param name="obj"></param>
/// <param name="resolveEventArgs"></param>
/// <returns></returns>
private static Assembly AssemblyResolve(object obj, ResolveEventArgs resolveEventArgs)
{
AppDomain appDomain = (AppDomain)obj;
string text = appDomain.ApplyPolicy(resolveEventArgs.Name);
Assembly assembly = null;
try
{
if (text != resolveEventArgs.Name)
{
assembly = Assembly.Load(text);
}
else
{
assembly = AssemblyUtils.AassemblyName(new AssemblyName(text));
}
}
catch
{
assembly = null;
}
if (assembly == null && text.Split(new char[]
{
','
})[0].LastIndexOf(".resources", StringComparison.Ordinal) < 0)
{
Console.WriteLine("*** Load Assembly Failed: {0}", resolveEventArgs.Name);
}
return(assembly);
}
private static AssemblyReferenceInfo GetAssemblyReferenceInfo(
IDictionary <string, AssemblyReferenceInfo> assemblies,
AssemblyName assemblyName,
AppDomain appDomainWithBindingRedirects,
VisualizerOptions options,
string fileName = "")
{
if (options.SkipSystem && AssemblyInformationProvider.IsSystemAssembly(assemblyName))
{
return(null);
}
if (!string.IsNullOrEmpty(options.ReferencedStartsWith) &&
!assemblyName.FullName.StartsWith(options.ReferencedStartsWith, StringComparison.OrdinalIgnoreCase))
{
return(null);
}
var assemblyFullName = appDomainWithBindingRedirects != null
? appDomainWithBindingRedirects.ApplyPolicy(assemblyName.FullName)
: assemblyName.FullName;
if (assemblies.TryGetValue(assemblyFullName, out AssemblyReferenceInfo assemblyReferenceInfo))
{
return(assemblyReferenceInfo);
}
assemblyReferenceInfo = new AssemblyReferenceInfo(assemblyName, new AssemblyName(assemblyFullName), fileName);
assemblies.Add(assemblyFullName, assemblyReferenceInfo);
return(assemblyReferenceInfo);
}
private string ApplyPolicy(string name)
{
while (true)
{
var newName = domain.ApplyPolicy(name);
if (newName == name)
{
return(name);
}
name = newName;
}
}