Question

我有一个viewmodel，它包含一个observablearray项。我有一个在viewmodel中使用的子类。我们可以从子类中的viewmodel访问observablearray吗？

这是我的viewmodel和子类

function XeroxSection() {
  var self = this;
  self.xrxcostupliftdesc = ko.observable('This is some data');
  self.xrxdisticostgmdesc = ko.observable('This is some data');
  self.xrxothercost1 = ko.observable('This is some data');
  self.xrxothercost2 = ko.observable('This is some data');
  self.xrxcostuplift = ko.observable(5);
  self.xrxGM = ko.observable(10);
  self.Sum = ko.computed(function () {
    return 200;
  });
}
function Configuration(data,xrxsec) {
var self = this;
self.configKey = data.pKey;
self.configName = data.configName;
self.configNumber = data.modelnumber;
self.configMTP = ko.observable(data.mTP);
self.configMDP = ko.observable(data.mDP);
self.confxrxcostuplift = ko.computed(function () {
    return (self.configMTP() * xrxsec.xrxcostuplift()) / 100;
});
}
function AppViewModel() {
  var self = this;
  self.xrxSec = ko.observable(new XeroxSection());
  self.Configurations = ko.observableArray([]);
  self.Configurations.push(new Configuration({configName:
  "PHASER 3010V/B PRINTER",mDP:10,mTP:20,pKey:1,modelNumber:"3010V_B"},
  self.xrxSec()));
  self.Configurations.push(new Configuration({
  configName:"PHASER 4015V/B PRINTER",mDP:90,mTP:50,pKey:2,modelNumber:"3010V_B"},
  self.xrxSec()));
  self.selConfig = ko.observable();
}
 var vm = new AppViewModel();
 ko.applyBindings(vm);

从上面的代码中可以看出，我希望将所有配置的configMTP之和加到计算的observable＆＃34; Sum＆＃34;在XeroxSection类中。有人可以帮助解决这个问题吗？

这是JSFiddle http://jsfiddle.net/XMYPb/

Answer 1

创建子模型时，将父项作为参数传递给子项

self.ChildProperty(new childprop (params,self))

这样你就可以在孩子

中访问这样的父母了

var childprop = function(params , parent){
    var self = this
    self.Parent = ko.observable(parent)
}

现在您可以访问

self.Parent().Prop() // Prop is parent property

如何在knockout js中访问子类中的父视图模型数组

1 个答案: