/// <summary>
/// Build Service
/// </summary>
/// <param name="build"></param>
public static void Build(Action <ServiceCollection> build)
{
var serviceCollection = new ServiceCollection();
build(serviceCollection);
ServiceProvider = serviceCollection.BuildServiceProvider();
}
/// <summary>
/// 根据指定类型/接口类型 创建实例
/// </summary>
/// <param name="serviceProvider"></param>
/// <param name="type"></param>
/// <param name="implementationType"></param>
/// <param name="args"></param>
/// <returns></returns>
public static object CreateInstance(Interface.IServiceProvider serviceProvider, Type type, Type implementationType, params object[] args)
{
if (type.IsInterface && implementationType == null)
{
implementationType = FindImplementationType(type);
}
var constructors = implementationType.GetConstructors().OrderBy(m => m.GetParameters().Length);
foreach (var item in constructors)
{
var parameters = item.GetParameters();
var flag = true;
var ctorArgs = new object[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
var parameter = parameters[i];
if (args.Any(m => parameter.ParameterType.IsAssignableFrom(m.GetType())))
{
ctorArgs[i] = args.First(m => parameter.ParameterType.IsAssignableFrom(m.GetType()));
continue;
}
var serviceInstance = serviceProvider.GetService(parameter.ParameterType);
if (serviceInstance != null)
{
ctorArgs[i] = serviceInstance;
continue;
}
flag = false;
break;
}
if (flag)
{
var instance = CreateInstance(implementationType, ctorArgs);
return(instance);
}
}
throw new MissingMethodException("创建" + implementationType.Name + "失败，因为没有找到合适的构造函数参数");
}
public static T GetService <T>(this Interface.IServiceProvider provider)
{
return((T)provider.GetService(typeof(T)));
}
