试图impinment SignalR与淘汰ViewModel

Question

我有以下代码，它似乎不是调用客户端和更新KnockOutJS视图模型的信息。 GetOuting（）在页面加载时被调用，并将正确的信息输入到视图模型中。 Chrome在开发者工具中没有显示JS错误。从那时起，我很难找出如何排除故障。任何帮助表示赞赏。 SignalR集线器

public class Outings : Hub 
{ 
    private static Dictionary<Guid, OutingViewModel> outings = new Dictionary<Guid, OutingViewModel>(); 

    public void GetOuting(string id) 
    { 
     var guidID = new Guid(id); 
     bool containsOuting = outings.ContainsKey(guidID); 
     if (!containsOuting) 
     { 
      var outingAccessor = new OutingAccessor(); 
      outingAccessor.ID = guidID; 
      outingAccessor.Load(); 
      var outingVM = new OutingViewModel(outingAccessor); 
      outings.Add(guidID, outingVM); 
     } 
     var outing = outings[guidID]; 
     this.Clients.updateOuting(outing); 
    } 

    public void SaveOuting(string outingNumber, OutingViewModel outing) 
    { 
     var guidID = new Guid(outingNumber); 
     outings[guidID] = outing; 
     this.Clients.updateOuting(outing); 
    } 
} 

视图模型

public class OutingViewModel 
{ 
    public OutingViewModel(OutingAccessor outingAccessor) 
    { 
     ID = outingAccessor.ID; 
     OutingNumber = outingAccessor.OutingNumber; 
     var outingGeneralAccessor = new OutingGeneralAccessor(); 
     var outingGeneral = outingGeneralAccessor.GetOutingGeneralByOutingID(outingAccessor.ID); 
     this.OutingName = outingGeneral.Name; 
    } 
    public Guid ID { get; set; } 
    public int OutingNumber { get; set; } 
    public string OutingName { get; set; } 
} 

HTML + JavaScript的

@model string 
<script src="@Url.Content("~/Scripts/jquery-1.7.1.min.js")" type="text/javascript"> </script> 
<script src="@this.Url.Content("~/Scripts/jquery.signalR.js")" type="text/javascript">  </script> 
<script src="@this.Url.Content("~/Scripts/knockout.js")" type="text/javascript"> </script> 
<script type="text/javascript" src="/signalr/hubs"> </script> 
<script type="text/javascript"> 
    $(function() { 
     function outingDataViewModel() { 
      this.hub = $.connection.outings; 
      this.ID = ko.observable(); 
      this.OutingNumber = ko.observable(); 
      this.OutingName = ko.observable(); 
      //Initializes the view model 
      this.init = function() { 
       this.hub.getOuting('@this.Model'); 
      }; 
      this.hub.updateOuting = function(data) { 
       ID(data.ID); 
       OutingName(data.OutingName); 
       OutingNumber(data.OutingNumber); 
      }; 
     } 
     var vm = new outingDataViewModel(); 
     ko.applyBindings(vm); 
     // Start the connection 
     $.connection.hub.start(function() { vm.init(); }); 
    }); 
</script> 
<h1>Outing Number</h1> 
<div id="OutingSummary"> 
    <div data-bind="text:OutingNumber"></div> 
    <div data-bind="text:OutingName"></div> 
</div> 

在进一步调试这似乎是在线

ID(data.ID); 
OutingName(data.OutingName); 
OutingNumber(data.OutingNumber); 

它厕所K像我在尝试设置ID时遇到“undefined_method”异常。这对其他人有意义吗？

Answer 1

你在问题出在哪里是正确的。当服务器调用updateOuting方法和运行代码：

ID(data.ID); 
OutingName(data.OutingName); 
OutingNumber(data.OutingNumber); 

它不知道到哪里寻找ID，OutingName和OutingNumber。您需要指定它们存在于视图模型对象上。解决您的问题的一个解决方案是将javascript代码更改为以下内容：

<script type="text/javascript"> 
    $(function() { 
     function outingDataViewModel() { 
      var self = this; 
      self.hub = $.connection.outings; 
      self.ID = ko.observable(); 
      self.OutingNumber = ko.observable(); 
      self.OutingName = ko.observable(); 
      //Initializes the view model 
      self.init = function() { 
       self.hub.getOuting('@Guid.NewGuid().ToString()'); 
      }; 
      self.hub.updateOuting = function (data) { 
       self.ID(data.ID); 
       self.OutingName(data.OutingName); 
       self.OutingNumber(data.OutingNumber); 
      }; 
     } 
     var vm = new outingDataViewModel(); 
     ko.applyBindings(vm); 
     // Start the connection 
     $.connection.hub.start(function() { vm.init(); }); 
    }); 
</script> 

希望它有帮助！