Knockout.js 敲除模型绑定技术

我有这个删除视图模型，用于插入、更新、删除和显示城市

function City(data) {
    this.CityId = ko.observable(data.CityId);
    this.CityName = ko.observable(data.CityName);
}
function CityViewModel() {
    var self = this;
    self.Citys = ko.observableArray([]);
    self.SelectedCity = ko.observable();
    self.EditingCity = ko.observable(new City({ CityId: '', CityName: '' }));

    self.EditCity = function (city) {
        $.ajax("/Controller/GetSingalCity/" + ko.toJSON(city.CityId), {
            data: ko.toJSON({ CityId: city.CityId }),
            type: "POST", contentType: "application/json",
            success: function (result) {
                if (result.Success) {
                    var cityid = result.Data.CityId;
                    var cityname = result.Data.CityName;
                    self.EditingCity(new City({ CityId: cityid, CityName: cityname }));
                }
                else {
                    alert("Error..");
                }
            }
        }); 
    };
}

用这个代码每次插入更新删除我都要用

self.EditingCity(new City({ CityId: cityid, CityName: cityname }));

或

我不想包装self.EditingCity（new City（{CityId:''，CityName:''}））；对于每个操作（插入、更新、删除）。有人能告诉我怎么走吗？？

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我是淘汰赛的初学者……

您不需要创建新的城市对象。相反，只需更新现有的。任何绑定到该

EditingCity

对象的数据视图都应自动更新

因此，与其写：

self.EditingCity(new City({ CityId: cityid, CityName: cityname }));

你应该写：

self.EditingCity().CityId(newCityId);
self.EditingCity().CityName(newCityName);

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帕特里克，我相信你想要：self.EditingCity（）.CityId（newCityId）；self.EditingCity（）.CityName（newCityName）；因为编辑城市是可观察的。（请注意编辑城市后的参数）

self.EditingCity().CityId(newCityId);
self.EditingCity().CityName(newCityName);