c# – RavenDB:返回属性为null值的对象
发布时间:2020-12-15 21:25:33 所属栏目:百科 来源:网络整理
导读:我在ASP.NET MVC中使用Raven如下: [HttpGet]public ActionResult Index(){ ViewBag.Title = Strings.Workflows; ViewBag.AddNewText = Strings.Add_new; IEnumerableWorkflowIndexViewModel model; using (var session = DocumentStore.OpenSession()) { mo
我在ASP.NET MVC中使用Raven如下:
[HttpGet] public ActionResult Index() { ViewBag.Title = Strings.Workflows; ViewBag.AddNewText = Strings.Add_new; IEnumerable<WorkflowIndexViewModel> model; using (var session = DocumentStore.OpenSession()) { model = session.Query<Workflow>() .Select(w => new WorkflowIndexViewModel { WorkflowId = w.Id,WorkflowName = w.Name }) .ToArray(); } return View(model); } 奇怪的是模型对象有一个值(正如我所料,因为我知道我的数据库中有一个Workflow文档),但它上面的WorkflowId和WorkfloName属性都是null.为什么是这样?我的预测有问题吗? 我已经尝试将ToArray()调用移到Select()之前,这很好用: [HttpGet] public ActionResult Index() { ViewBag.Title = Strings.Workflows; ViewBag.AddNewText = Strings.Add_new; IEnumerable<WorkflowIndexViewModel> model; using (var session = DocumentStore.OpenSession()) { model = session.Query<Workflow>() .ToArray() .Select(w => new WorkflowIndexViewModel { WorkflowId = w.Id,WorkflowName = w.Name }); } return View(model); } 解决方法
如果将视图模型中属性的名称更改为与Workflow类相同,则它将起作用.
model = session.Query<Workflow>() .Select(w => new WorkflowIndexViewModel { Id = w.Id,Name = w.Name }) .ToArray(); 但这只是一个似乎是一个错误或限制的解决方法. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |