Arrays 敲除更新表中的单元格值

当我更改B列中的选择时，A列中的文本也应该更改，但不会更改。 为什么?

HTML:

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请提供帮助。

如果要绑定/更新数据数组中的项，必须将其声明为可观察项

function AppViewModel() {
   var self = this;
   self.MyOptions = ko.observableArray([
       {id: 'a1', name: 'One'},
       {id: 'a2', name: 'Two'},
       {id: 'a3', name: 'Three'}
   ]);

   self.Data = ko.observableArray([
       {idOpt: ko.observable('a1')},
       {idOpt: ko.observable('a2')},
       {idOpt: ko.observable('a1')}
   ]);
}

var vm = new AppViewModel();
ko.applyBindings(vm);

淘汰文档向您展示了使用普通模型与使用可观察模型之间的区别

function AppViewModel() {
   var self = this;
   self.MyOptions = ko.observableArray([
       {id: 'a1', name: 'One'},
       {id: 'a2', name: 'Two'},
       {id: 'a3', name: 'Three'}
   ]);

   self.Data = ko.observableArray([
       {idOpt: 'a1'},
       {idOpt: 'a2'},
       {idOpt: 'a1'}
   ]);
}

var vm = new AppViewModel();
ko.applyBindings(vm);

function AppViewModel() {
   var self = this;
   self.MyOptions = ko.observableArray([
       {id: 'a1', name: 'One'},
       {id: 'a2', name: 'Two'},
       {id: 'a3', name: 'Three'}
   ]);

   self.Data = ko.observableArray([
       {idOpt: ko.observable('a1')},
       {idOpt: ko.observable('a2')},
       {idOpt: ko.observable('a1')}
   ]);
}

var vm = new AppViewModel();
ko.applyBindings(vm);