C#-试图为不同的处理程序返回泛型类型T

球门

1. 在Program.cs中,我调用不同的命令处理程序,但希望它们返回 CustomerResponse<T> -因此每个命令处理程序都可以为类型T返回自己的类型

客户响应:

public class CustomerResponse<T>
{
    public T Response { get; set; } // so other handlers can return their own response
}

ICommandHandler:

public interface ICommandHandler
{
    CustomerRespone<T> Handle<T>(T details);
}

命令处理程序:

public interface CustomerCommandHandler : ICommandHandler
{
    // injecting our service in ctor

    public CustomerResponse<T> Handle<T>(T details)
    {
        // result is of type CustomerResponse<Operation> but we can't return directly
        // because it can't be implicitly casted to CustomerResult<T>
        var result = _customerService.CustomerOperation(details);
        
        // doesn't do what i expect it to do at runtime
        return (CustomerResponse<T>)(object)result;
    }
}

程序.cs:

var result = _customerHandler.Handle(CustomerDetails details);

问题:

• 程序.cs中的结果类型为 CustomerDetails
• 所以我会得到一个类型的铸造错误 CustomerResponse<Operation> 到 CustomerResponse<CustomerDetails>
• 我们想回来 客户响应<操作>

这样我们就可以有多个处理程序,它们可以返回自己的CustomerResponse