.net内核中的Urlhelper和IActionContextAccessor

Question

我有一些想转置到.net核心的.net Framework4.5代码：

[DataContract]
    public class RouteData
    {
        public RouteData()
        {
            Request = new RequestRouteData();
        }

        [DataMember] public RequestRouteData Request { get; set; }
    }

    public class RequestRouteData : BaseRouteData
    {
        [DataMember]
        public string AddUploadOtherFileStep5
        {
            get { return UrlHelper.Action("AddOtherFields", "Request"); }
        }
    }


    public class BaseRouteData
    {
        protected UrlHelper UrlHelper { get; set; }

        protected BaseRouteData()
        {
            UrlHelper = new UrlHelper(HttpContext.Current.Request.RequestContext);
        }
    }

所以，我发现要获得当前的上下文，我必须使用IActionContextAccessor，但我很难获得相同的方法来这样做。

这是我到目前为止尝试过的：

[DataContract]
    public class RouteData
    {
        public RouteData()
        {
            Request = new RequestRouteData();
        }

        [DataMember] public RequestRouteData Request { get; set; }
    }

    public class RequestRouteData : BaseRouteData()
    {
        [DataMember] public string AddOtherFields => UrlHelper.Action(What to put here?);
    }


    public class BaseRouteData
    {
        protected UrlHelper UrlHelper { get; }

        protected BaseRouteData(IActionContextAccessor actionContext, IUrlHelperFactory urlHelperFactory)
    {
        UrlHelper = (UrlHelper) urlHelperFactory.GetUrlHelper(actionContext.ActionContext);
    }
    }

编辑3：

public class JavascriptData
    {
        public JavascriptData()
        {
            Routes = new RouteData();
        }

        [DataMember] public RouteData Routes { get; set; }

        #region ScriptFactory

        public static string ScriptFactory()
        {
            var serializerSettings = new JsonSerializerSettings();
            serializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
            var script = new StringBuilder();
            JavascriptData appData = new JavascriptData();
            var text = JsonConvert.SerializeObject(appData, Formatting.Indented, serializerSettings);
            script.AppendFormat("var appData={0}", text);
            return script.ToString();
        }

        #endregion
    }

我走对了吗？因为我不知道如何使用UrlHelper.Action()方法来获得与.net 4.5中相同的结果……

Answer 1

差不多了。您还需要注入IUrlHelperFactory。然后：

UrlHelper = urlHelperFactory.GetUrlHelper(actionContext.ActionContext);

Answer 2

好的，所以我可能已经找到了方法。如果有人能确认我做得对，我将不胜感激:)

在Startup.cs中，我添加了：

services.AddScoped(sp => {
                var actionContext = sp.GetRequiredService<IActionContextAccessor>().ActionContext;
                var urlHelperFactory = sp.GetRequiredService<IUrlHelperFactory>();
                return urlHelperFactory.GetUrlHelper(actionContext);
            });

然后我的RouteData.cs就变成了：

     [DataContract]
        public class RouteData
        {
            public RouteData(IUrlHelper iUrlHelper)
            {
                Request = new RequestRouteData(iUrlHelper);
            }
            [DataMember] public RequestRouteData Request { get; set; }
        }

        public class RequestRouteData : BaseRouteData
        {
            public RequestRouteData(IUrlHelper iUrlHelper) : base(iUrlHelper)
            {
            }
            [DataMember] 
public string AddOtherFields => UrlHelper.Action("AddOtherFields", "Request");
        }


        public class BaseRouteData
        {
            protected UrlHelper UrlHelper { get; }
            protected BaseRouteData(IUrlHelper iUrlHelper)
            {
                UrlHelper = iUrlHelper as UrlHelper;
            }
        }

和Javascriptdata()：

[DataContract]
    public class JavascriptData
    {
        private static IUrlHelper _iUrlHelper;
        public JavascriptData(IUrlHelper iUrlHelper)
        {
            _iUrlHelper = iUrlHelper;
            Routes = new RouteData(_iUrlHelper);
        }

        [DataMember] public RouteData Routes { get; set; }

        #region ScriptFactory

        public static string ScriptFactory()
        {
            var serializerSettings = new JsonSerializerSettings();
            serializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
            var script = new StringBuilder();
            JavascriptData appData = new JavascriptData(_iUrlHelper);
            var text = JsonConvert.SerializeObject(appData, Formatting.Indented, serializerSettings);
            script.AppendFormat("var appData={0}", text);
            return script.ToString();
        }

        #endregion
    }

最终目标是在应用程序开始时生成一个json，供前端开发团队在ajax等应用程序中使用。这是他们曾经拥有的东西，我正在尝试转置到.net核心。

下面是一个示例：

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