带有绑定的HTML：
<div class="container" data-bind="foreach: { data: Conferences, as: 'conf' }">
<div class="conf" data-bind="attr: { id : conf.Id }">
<div class="conf-month" data-bind="text: conf.StartTime"></div>
<div class="conf-day" data-bind="text: conf.EndTime"></div>
<div class="add-user">
<input type="tel" data-bind="value: $root.PhoneNumber />
<input type="email" data-bind="value: $root.Email" />
<a id="add-user" title="Add new user" data-bind="attr: { value: conf.Id }, click: $root.addUserToConference">Add</a>
</div>
<div class="conf-users" data-bind="foreach: { data: conf.ConferenceUsers, as: 'user' }">
<div class="conf-user" data-bind="attr: { id: 'confuser-' + user.Id}">
<span data-bind="text: user.Name"></span>
<span data-bind="text: user.PhoneNumber"></span>
<span data-bind="text: user.Email"></span>
</div>
</div>
</div>
</div>
KnockoutJs ViewModel：
function ConferenceViewModel() {
var self = this;
self.Conferences = ko.observableArray([]);
self.PhoneNumber = ko.observable("");
self.Email = ko.observable("");
self.getAllConfs = function () {
$.ajax({
type: 'GET',
url: '/confs/getconfs',
}).done(function (confs) {
$.each(confs, function (index, conf) {
//populate the list on document ready
confVm.Conferences.push(conf);
};
}).fail(showError);
}
self.addUserToConference = function (viewModel, event) {
var user = {
"Id": 0,
"ConferenceId": viewModel.Id(),
"Email": "self.Email()",
"PhoneNumber": self.PhoneNumber(),
};
// here we should insert a new ConferenceUser into the Conferences observable array
// and also update the DOM
// ajax to insert user to db
}
通过ajax填充上面的会议observableArray后，
console.log(ko.toJSON(confVm.Conferences()))的输出如下：
[
{
"ConferenceUsers":[
{
"Id":3006,
"ConferenceId":8,
"Name":null,
"Email":"mail@lala.com",
"UserName":null,
"PhoneNumber":"234234234234",
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":8,
"Subject":"YYYhaaaaa",
"StartTime":"2016-05-29T18:30:00",
"EndTime":"2016-05-29T19:30:00",
"OrganizerEmail":"elpas@live.com",
"OrganizerName":"dasdasd",
"Pin":"6402",
"BridgeId":null,
"State":null
},
{
"ConferenceUsers":[
{
"Id":3013,
"ConferenceId":12,
"Name":null,
"Email":"dsfdfsdfdsf@dfdfdf.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":12,
"Subject":"dsfsdfdsfsdf",
"StartTime":"2016-05-31T22:00:00",
"EndTime":"2016-05-31T23:00:00",
"OrganizerEmail":"d@adssad.com",
"OrganizerName":"dsfdsfsdf",
"Pin":"3402",
"BridgeId":null,
"State":null
}
]
问：如何通过ConferenceId插入新的ConferenceUser并相应地更新DOM？
答案 0 :(得分：1)
试试这个：
var obj = [
{
"ConferenceUsers":[
{
"Id":3006,
"ConferenceId":8,
"Name":null,
"Email":"mail@lala.com",
"UserName":null,
"PhoneNumber":"234234234234",
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":8,
"Subject":"YYYhaaaaa",
"StartTime":"2016-05-29T18:30:00",
"EndTime":"2016-05-29T19:30:00",
"OrganizerEmail":"elpas@live.com",
"OrganizerName":"dasdasd",
"Pin":"6402",
"BridgeId":null,
"State":null
},
{
"ConferenceUsers":[
{
"Id":3013,
"ConferenceId":12,
"Name":null,
"Email":"dsfdfsdfdsf@dfdfdf.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":12,
"Subject":"dsfsdfdsfsdf",
"StartTime":"2016-05-31T22:00:00",
"EndTime":"2016-05-31T23:00:00",
"OrganizerEmail":"d@adssad.com",
"OrganizerName":"dsfdsfsdf",
"Pin":"3402",
"BridgeId":null,
"State":null
}
];
/* Iterate all conferences */
for (var i in obj) {
/* Find conference with ID = 8 */
if (obj[i].Id === 8) {
/* Add a new user to the conference */
obj[i].ConferenceUsers.push({
"Id":1111,
"ConferenceId":1,
"Name":null,
"Email":"test@example.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
});
break;
}
}
console.log(obj); // output result
答案 1 :(得分：1)
您需要执行以下四个步骤：
Conferences ConferenceUsers Conferences 虽然所有步骤都非常直接执行，但它们的工作方式会有一些缺点：
Conference个对象和ConferenceUsers数组无法观察到。 Knockout无法自动识别{strong>内部 Conference个对象的任何更改。因此，在第3步和第4步之后，为了淘汰，它似乎不会出现任何变化：Conferences数组中仍有相同的对象。< / p>
我的建议：
如果将新用户添加到会议中会定期发生，我建议您创建一个Conference视图模型，其中包含ko.observableArray个用户。或者，您可以为每个次要更改创建 new Conference对象，这将触发knockout重新呈现整个UI而不仅仅是相关部分（假设您已使用过foreach数据绑定在某处。）
如何将常规Conference对象映射到视图模型的快速示例：
// Your JSON data from the ajax request (an array of objects)
var conferencesData = [];
var Conference = function(conferenceJSON) {
// It's better to map all properties you're using individually,
// but this at least exposes the original JSON object
this.props = conferenceJSON;
this.users = ko.observableArray(conferenceJSON.conferenceUsers);
};
var createConference = function(conferenceJSON) {
return new Conference(conferenceJSON);
};
var ConferenceList = function(conferencesJSON) {
var self = this;
this.conferences = ko.observableArray(conferencesJSON.map(createConference));
this.addConference = function(conferenceJSON) {
self.conferences.push(createConference(conferenceJSON));
};
this.addUserToConference = function(userJSON) {
var conferences = self.conferences();
for (var c = 0; c < conferences.length; c += 1) {
// Step 2: Find the conference with the required id
if (conferences[c].props.id === userJSON.ConferenceId) {
// Step 3: We're pushing to an observableArray, so no need
// to worry about Step 4.
conferences[c].users.push(userJSON);
return true;
}
}
return false;
};
};
ko.applyBindings(new ConferenceList(conferencesData));