填充下拉菜单 - 从服务器中选择选项

时间:2014-03-02 09:19:28

标签: javascript knockout.js

我目前正在使用knockout.js框架。我已经采用example形式的基本联系人,并根据自己的需要对其进行了修改。每位联系人的状态均为ACTIVEINACTIVE。在状态下拉菜单中,我想显示联系人的选定状态。我得到一个通常的选择选项列表,而不是获得两个选项。如何在knockout.js中正确显示下拉菜单? DEMO

编辑@ haim770:

    var ContactsModel = function (contacts) {
    var self = this;
    self.contacts = ko.observableArray(ko.utils.arrayMap(contacts, function (contact) {
    return {
            firstName: contact.firstName,
            lastName: contact.lastName,
            selectedOptionValue : contact.selectedOptionValue,
            phone: contact.phone,
            alt_phone: contact.alt_phone,
            main1: ko.observable(contact.main1),
            main2: ko.observable(contact.main2)
        };
    }));

    self.statusList = ['ACTIVE', 'INACTIVE'];

    self.addContact = function () {
        self.contacts.push({
            firstName: "",
            lastName: "",
            selectedOptionValue : ko.observable("ACTIVE"),
            phone: "",
            alt_phone: "",
            main1: false,
            main2: false
        });
    };

    self.removeContact = function (contact) {
        self.contacts.remove(contact);
    };

    self.addPhone = function (contact) {
        contact.phones.push({
            number: ""
        });
    };

    self.removePhone = function (phone) {
        $.each(self.contacts(), function () {
            this.phones.remove(phone)
        })
    };

    self.save = function () {
            self.lastSavedJson(JSON.stringify(ko.toJS(self.contacts), null, 2));
        };


    self.lastSavedJson = ko.observable("");


};

$.getJSON("functions/getPerson.php", function(allData) {
          ko.applyBindings(new ContactsModel(allData));
});

HTML

<li>
<select data-bind="options: $root.statusList, value: selectedOptionValue"></select>
</li>

JSON

[{"firstName":"James","lastName":"Southerland","phone":"1234567890","statusList":"ACTIVE","alt_phone":"1234567890","main1":true,"main2":false},{"firstName":"Tina","lastName":"Turner","phone":"1234567890","statusList":"INACTIVE","alt_phone":"1234567890","main1":false,"main2":true}]

1 个答案:

答案 0 :(得分:1)

<强> 1 从服务器返回的JSON格式不正确。不是在selectedOptionValue中设置实际联系人状态(与在addContact方法中一样),而是将其作为statusOptionValues字段返回。

<强> 2 无需在每个联系人中包含“活动/非活动”数组(statusOptionValues)。试试这个:

self.statusList = ['ACTIVE', 'INACTIVE'];

然后适当地更改您的绑定声明:

<select data-bind="options: $root.statusList, value: selectedOptionValue"></select>

第3 您最好依赖boolean字段而不是string数组:

contact.isActive = ko.observable(true);