public void LoadFrom(string path)
{
//get path to libs folder
string libsPath = path;
//get only dll files
string[] providers = Directory.GetFiles(libsPath, "*.dll");
//for simplicity excaped LINQ query...
//for every provider ....
foreach (string provider in providers)
{
//load it into application RAM..
Assembly assembly = Assembly.LoadFile(provider);
//get all types in assembly
Type[] assemblyTypes = assembly.GetTypes();
foreach (Type assemblyType in assemblyTypes)
{
ProviderNameAttribute providerNameAttr = (ProviderNameAttribute)assemblyType.GetCustomAttribute(typeof(ProviderNameAttribute));
var method = assemblyType.GetMethods()
.Where(x => x.GetCustomAttribute(typeof(ProviderOperationAttribute)) != null)
.FirstOrDefault();
//if current type implemented IProvider interface then..
if (providerNameAttr != null && method != null)
{
object instance = Activator.CreateInstance(assemblyType);
var providerOperationAttr = method.GetCustomAttribute <ProviderOperationAttribute>();
this.AddProvider(providerNameAttr.ProviderName, () =>
{
method.Invoke(instance, null);
}, providerOperationAttr.EventType);
}
}
}
}
static DbManagerFactory()
{
// Register assemblies
string contentRootPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
string[] assemblies = (contentRootPath != null) ?
Directory.GetFiles(contentRootPath, "Kit.Dal.*.dll", SearchOption.TopDirectoryOnly) :
new string[] {};
Func <Type, bool> pre = t => t.GetInterfaces().Contains(typeof(IDbManager));
Managers = new Dictionary <string, Type>();
foreach (string a in assemblies)
{
#if NETCOREAPP1_0
Assembly assembly = System.Runtime.Loader.AssemblyLoadContext.Default.LoadFromAssemblyPath(a);
#endif
#if NET46
Assembly assembly = Assembly.LoadFrom(a);
#endif
foreach (Type t in assembly.GetTypes().Where(pre))
{
// Наименование --> из аттрибута
ProviderNameAttribute attr = null;
#if NETCOREAPP1_0
attr = (ProviderNameAttribute)t.GetTypeInfo().GetCustomAttribute(typeof(ProviderNameAttribute));
#endif
#if NET46
attr = (ProviderNameAttribute)t.GetCustomAttribute(typeof(ProviderNameAttribute));
#endif
if (attr != null)
{
Managers[attr.ProviderName] = t;
}
}
}
}
