我创建了一个jsfiddle来说明这一点,并在下面包含代码以供参考.

我为冗长的代码道歉…

基因

<!-- ko with: dialog -->
<div id="taskdlg" class="resizeableDialog" 
    data-bind="dialog: {autoOpen: false,title: 'Edit task',height: 200,width: 500,modal: true,close: updateCloseState},openWhen: open">
    <form data-bind="submit: update">
        <table>
            <tr>
                <td style="width: 100px;"><label for="tasktitle">Title</label></td>
                <td width="*">
                    <input id="tasktitle" type="text" placeholder="Task name" data-bind="value: titletext,valueUpdate: 'afterkeydown'" />
                </td>
            </tr>
            <tr>
                <td><button style="float: left;" data-bind="click: cancel">Cancel</button></td>
                <td><button style="float: right;" type="submit">Save</button></td>
            </tr>
        </table>
    </form>
</div>
<!-- /ko -->
 
<button data-bind="click: editTask">Edit</button>
<span data-bind="text: task"></span>

javascript如下：

ko.bindingHandlers.dialog = {
    init: function(element,valueAccessor,allBindingsAccessor) {
        var options = ko.utils.unwrapObservable(valueAccessor());
        setTimeout(function() { $(element).dialog(options || {}); },0);
 
        //handle disposal (not strictly necessary in this scenario)
         ko.utils.domNodeDisposal.addDisposeCallback(element,function() {
             $(element).dialog("destroy");
         });   
    },update: function(element,allBindingsAccessor) {
         var shouldBeOpen = ko.utils.unwrapObservable(allBindingsAccessor().openWhen);
         $(element)
             .dialog(shouldBeOpen ? "open" : "close");
    }
};
 
function Task(name) {
    var self = this;
    this.title = ko.observable(name);
 
    this.toString = function() { return "Task: " + self.title(); };
}
 
function TaskDialog(viewmodel) {
    var self = this;
 
    this.viewmodel = viewmodel;
    this.task = ko.observable();
    this.open = ko.observable(false);
    this.titletext = ko.observable();
 
    this.editTask = function(task) {
        self.task(task);
        self.titletext(task.title());
        self.open(true);
    }
 
    this.update = function() {
        var task = self.task();
        task.title(self.titletext());
        self.open(false);
    }
 
    this.updateCloseState = function() {
        if (self.open())
            self.open(false);
    }
 
    this.cancel = function() {
        self.open(false);
    }
}
 
 
function viewmodel() {
    var self = this;
    this.dialog = ko.observable(new TaskDialog(self));
    this.task = ko.observable(new Task('sample task'));
 
    this.editTask = function() {
        self.dialog().editTask(self.task());
    }
};
 
ko.applyBindings(new viewmodel());