我的 Knockout.js viewModel 有一个更新方法，它绑定到更新按钮的点击事件。单击时，名字和姓氏不包含在 ajax 数据负载中。但是，如果我使这些属性不可观察，那么它们将包含在 ajax 数据播放负载中。有谁知道为什么？
单选按钮值在 ajax 数据中，但 WebAPI PUT 方法上的模型绑定器看不到更新的值。是因为模型在寻找“真”或“假”值或“1”或“0”时json数据中的“是”和“否”。alertOptIn和active属性的数据类型为Nullable。
成功后，如何刷新绑定到用户可观察数组的表列表？我正在直接调用 self.getByInitial(thisIni)，它被定义为 viewModel 中的另一种方法，但它不起作用。getByInitial(thisIni) 在被超链接 DOM 元素触发时确实有效。
谢谢您的帮助。
function viewModel() {
var baseApiUri = "@Model.apiBaseUrl";
var self = this;
/********** view model **********/
function userViewModel(user) {
var self = this;
self.user_ID = user.user_ID;
self.firstName = ko.observable(user.firstName);
self.lastName = ko.observable(user.lastName);
self.long_name = ko.dependentObservable(function () {
return self.firstName() + " " + self.lastName();
}, self);
self.Password = user.Password; //not used but required
self.Login = user.Login;
self.dateAdded = user.dateAdded;
self.email = user.email;
self.alertOptIn = user.alertOptIn ? "Yes" : "No";
self.active = user.active ? "Yes" : "No";
}
/********** properties **********/
self.newUser = ko.observable();
self.userBeforeEdit = ko.observable();
self.users = ko.observableArray();
self.user = ko.observable();
self.operationStatus = ko.observable();
self.update = function () {
self.operationStatus("Requesting " + baseApiUri + "/api/user/" + self.user().user_ID + " ...");
var thisIni = self.user().lastName._latestValue.charAt(0);
//alert(thisIni);
$.ajax({
url: baseApiUri + "/api/user/" + self.user().user_ID,
cache: false,
type: 'PUT',
contentType: 'application/json; charset=utf-8',
data: JSON.stringify(self.user()),
success: function () {
self.getByInitial(thisIni);
self.operationStatus("done");
}
})
.fail(function (xhr, textStatus, err) {
self.operationStatus(err);
});
}
cshtml:
<div id="detailTab">
<div data-bind="if: user()">
<input type="hidden" data-bind="text: user().Password"/>
<div>
<label for="firstName">First Name</label>
<input data-bind="value: user().firstName" type="text" title="First Name" />
</div>
<div>
<label for="lastName">Last Name</label>
<input data-bind="value: user().lastName" type="text" title="Last Name" />
</div>
<div>
<label for="fullName">Full Name</label>
<input data-bind="value: user().long_name" type="text" title="Full Name" disabled="disabled" />
</div>
<div>
<label for="login">Login</label>
<input data-bind="value: user().Login" type="text" title="Login" />
</div>
<div>
<label for="dateAdded">Date Added</label>
<input data-bind="value: user().dateAdded" type="text" title="Date Added" />
</div>
<div>
<label for="email">Email</label>
<input data-bind="value: user().email" type="text" title="Email" />
</div>
<div>
<label for="emailAlert">Email Alert</label>
<span><input data-bind="checked: user().alertOptIn" type="radio" title="Send Email Alert" value="Yes" name="alertOptIn"/>Yes</span>
<span><input data-bind="checked: user().alertOptIn" type="radio" title="No Email Alert" value="No" name="alertOptIn"/>No</span>
</div>
<div>
<label for="accountStatus">Account Status</label>
<span><input data-bind="checked: user().active" type="radio" title="Active" value="Yes" name="active" />Active</span>
<span><input data-bind="checked: user().active" type="radio" title="Inactive" value="No" name="active"/>Inactive</span>
</div>
<input type="button" value="Update" data-bind="click: update" />
<input type="button" value="Cancel" data-bind="click: cancelEdit" />
<p data-bind="text:operationStatus" class="status"></p>
</div>
</div>
阿贾克斯请求：
PUT http://localhost/AppBL/api/user/129 HTTP/1.1
Accept: */*
Content-Type: application/json; charset=utf-8
X-Requested-With: XMLHttpRequest
Referer: http://localhost/AppUL/Home/UserList
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: localhost
Content-Length: 220
Connection: Keep-Alive
Pragma: no-cache
{"user_ID":129,"Password":"omitted","Login":"myLogin","dateAdded":"2013-08-26T14:09:59","email":"myEmail@mycompany.com",alertOptIn":"Yes","active":"Yes"}