kendoDatePicker敲除绑定无效

Question

我试图从我的视图模型绑定kendoDatePicker值。

当我使用一个简单的，可观察的，它是完美的工作。html：

<input data-bind="kendoDatePicker: { value: myDate().selectedDate} " />

变更日期

​

var DateModel = function (json) {
            var self = this;

self.selectedDate = ko.observable((!json || !json.Value) ? new Date('01/02/2015') : new Date(json.Value));

};


function ViewModel() {
    var self = this;

    // initializing  my object with empty string to avoid html databinding exceptions
    self.myDate= ko.observable(new DateModel(''));

    self.changeDate = function () {

    self.myDate(new DateModel({Value:"09/08/1935"}));
    };

    return self;
};

ko.applyBindings(new ViewModel());

<!-- REFERENCES
    http://cdn.kendostatic.com/2012.3.1315/styles/kendo.common.min.css
    http://cdn.kendostatic.com/2012.3.1315/styles/kendo.default.min.css 
    http://cdn.kendostatic.com/2012.3.1315/js/kendo.core.min.js
    http://cdn.kendostatic.com/2012.3.1315/js/kendo.web.min.js
    http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js
    http://rniemeyer.github.com/knockout-kendo/js/knockout-kendo.min.js
-->


<input data-bind="kendoDatePicker: { value: myDate().selectedDate} " />

 <button data-bind="click: changeDate">Change Date</button>
    <p data-bind="text: myDate().selectedDate">  </p>

演示：http://jsfiddle.net/NGLEp/27/

但是，当我使用带有json值的可观察模型(就像解析我的webservice结果)时，它不起作用。

var DateModel = function (json) {
            var self = this;

self.selectedDate = ko.observable((!json || !json.Value) ? new Date('01/02/2015') : new Date(json.Value));

};


function ViewModel() {
    var self = this;

    // initializing  my object with empty string to avoid html databinding exceptions
    self.myDate= ko.observable(new DateModel(''));

    self.changeDate = function () {

    self.myDate().selectedDate(new Date());
    };

    return self;
};

ko.applyBindings(new ViewModel());

<!-- REFERENCES
    http://cdn.kendostatic.com/2012.3.1315/styles/kendo.common.min.css
    http://cdn.kendostatic.com/2012.3.1315/styles/kendo.default.min.css 
    http://cdn.kendostatic.com/2012.3.1315/js/kendo.core.min.js
    http://cdn.kendostatic.com/2012.3.1315/js/kendo.web.min.js
    http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js
    http://rniemeyer.github.com/knockout-kendo/js/knockout-kendo.min.js
-->


<input data-bind="kendoDatePicker: { value: myDate().selectedDate} " />

 <button data-bind="click: changeDate">Change Date</button>
    <p data-bind="text: myDate().selectedDate">  </p>

演示：http://jsfiddle.net/NGLEp/26/

救命啊！

Answer 1

这

self.myDate(new DateModel({Value:"09/08/1935"}));

重写绑定到selectedDate控件的旧datePicker实例。您可以使用setter方法来设置最初绑定的可观察值。

self.setDate = function(json){
    self.selectedDate((!json || !json.Value) ? new Date('01/02/2015') : new Date(json.Value));
};

JsFiddle：http://jsfiddle.net/newuserjs/NGLEp/28/