从ASP.NET RC2开始，[FromServices]已被删除.

As of ASP.NET RC2, [FromServices] has been removed.

如果只想在viewModels中直接为IValidatableObject.Validate提供DI，则可以使用validationContext.GetService(type)来获取服务.这在RC1中不起作用

If you want DI in your viewModels purely for IValidatableObject.Validate then you can use validationContext.GetService(type) to get your service. This did not work in RC1

EG

MyService myService = (MyService)validationContext.GetService(typeof(myService));

这里是一种通用的扩展方法，使它处理起来更加令人愉快.

Here is a generic extension method to make that a little more pleasant to deal with.

public static class ValidationContextExtensions
{
    public static T GetService<T>(this ValidationContext validationContext)
    {
        return (T)validationContext.GetService(typeof(T));
    }
}