问题:
我正在使用MVC4 WebAPI,并且在Get()调用期间抛出错误。
错误:
堆栈跟踪:
at System.Linq.Expressions.Expression.New(Type type)
at System.Web.Http.Internal.TypeActivator.Create[TBase](Type instanceType)
at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)"}
我很乐意提供所需的任何代码,只要让我知道您想看到的内容即可。
Controller :
namespace Comments2.Controllers
{
//[Authorize]
public class CommentsController : ApiController
{
ICommentRepository repository;
public CommentsController(ICommentRepository repository)
{
this.repository = repository;
}
[Queryable]
public IQueryable<Comment> GetComments()
{
return repository.Get().AsQueryable();
}
public Comment GetComment(int id)
{
Comment comment;
if (!repository.TryGet(id, out comment))
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
return comment;
}
}
JavaScript:
$(function() {
$("#getComments").click(function () {
// We're using a Knockout model. This clears out the existing comments.
viewModel.comments([]);
$.get('/api/comments', function (data) {
// Update the Knockout model (and thus the UI) with the comments received back
// from the Web API call.
viewModel.comments(data);
});
});
});
最佳答案
好像您使用的是HttpControllerActivator的默认实现,该实现不适用于依赖项注入(inject)。尝试this,它集成了unity容器来处理依赖关系,但是您可以对其进行修改以使用所需的DI的任何实现。
关于c# - 错误 “CommentsController does not have a default constructor”,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/11495776/