小编Jer*_*rcq的帖子

我在 Sitecore 9 更新 1 中调用 xConnect 客户端时遇到问题。客户端对象的初始化运行良好。但是当我在客户端调用一个方法时，我得到这个异常：

{
    "Message":"An error has occurred.",
    "ExceptionMessage":"An error occurred when trying to create a controller of type 'ContactsController'. Make sure that the controller has a parameterless public constructor.",
    "ExceptionType":"System.InvalidOperationException",
    "StackTrace":"   at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
   at Sitecore.XConnect.Web.DependencyInjection.WebApiServiceControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
   at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.d__1.MoveNext()",
    "InnerException":{
        "Message":"An error has occurred.",
        "ExceptionMessage":"Type 'Sitecore.XConnect.Web.Controllers.ContactsController' does not have a default constructor",
        "ExceptionType":"System.ArgumentException",
        "StackTrace":"   at System.Linq.Expressions.Expression.New(Type type)
       at System.Web.Http.Internal.TypeActivator.Create[TBase](Type instanceType)
       at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, …