children

问题 I have model as below class Person { public int Id { get; set; } public string Name { get; set; } } class Employee : Person { public string Dep { get; set; } } class Client : Person { public string Type { get; set; } } Now I would like to query Person by a property of Employee as follows context.Set<Person>().Where(x => ((Employee)x).Dep == "dep").ToList(); But I get the following error Unable to cast the type 'DomainModel.Person' to type 'DomainModel.Employee'. LINQ to Entities only supports

问题 I have an XML file in R. The XML file looks like this: rootNode <- xmlRoot(xmlfile) rootNode[[1]] <pdv id="1000001" latitude="4620114" longitude="519791" cp="01000" pop="R"> <adresse>ROUTE NATIONALE</adresse> <ville>SAINT-DENIS-LèS-BOURG</ville> <ouverture debut="01:00" fin="01:00" saufjour=""/> <services> <service>Automate CB</service> <service>Vente de gaz domestique</service> <service>Station de gonflage</service> </services> <prix nom="Gazole" id="1" maj="2014-01-02 11:08:03" valeur=

问题 I can add a bunch of pushpins to my map, then add more, than add more (etc.), but if I want to "start over" and call this: photraxMap.Children.Clear(); (photraxMap is the name of my Bing Map), it does indeed clear all the pushpins, but subsequent attempts to add pushpins fail. That is to say, it fails visually . Stepping through the code, the pushpins are created, they just don't display on the map. Each time I add pushpins, this code is used: private async void Gener8MapMarkers(IEnumerable

问题 I can add a bunch of pushpins to my map, then add more, than add more (etc.), but if I want to "start over" and call this: photraxMap.Children.Clear(); (photraxMap is the name of my Bing Map), it does indeed clear all the pushpins, but subsequent attempts to add pushpins fail. That is to say, it fails visually . Stepping through the code, the pushpins are created, they just don't display on the map. Each time I add pushpins, this code is used: private async void Gener8MapMarkers(IEnumerable

来源： https://stackoverflow.com/questions/48529109/show-children-for-subcategory-archives-in-woocommerce-product-category-widget

来源： https://stackoverflow.com/questions/48529109/show-children-for-subcategory-archives-in-woocommerce-product-category-widget

来源： https://stackoverflow.com/questions/61571040/how-can-you-check-which-children-are-active-within-a-parent-in-unity

来源： https://stackoverflow.com/questions/61571040/how-can-you-check-which-children-are-active-within-a-parent-in-unity

来源： https://stackoverflow.com/questions/56666580/contentchild-by-extended-abstract-class

来源： https://stackoverflow.com/questions/56666580/contentchild-by-extended-abstract-class