4
我正在使用MVC 4.0與knockout.js創建一個頁面,每5-10秒鐘會調用一次數據庫,並更新從數據庫中檢索新對象的模型,然後使用新模型更新視圖。使用knockout.js我需要從服務器調用更新我的模型,然後在視圖上顯示
目前我正在進行初始JSON獲取調用,這是返回模型,然後我可以將它綁定到視圖。然後我再次設置getJSON調用來每10秒執行一次更新,它將執行該函數並取回數據,但屏幕上未顯示更新。我曾嘗試在每次調用後調用ko.applyBindings,但頁面上仍然沒有更新,然後在幾次調用後崩潰瀏覽器。
我不確定我究竟做錯了什麼。我已經包含了下面代碼的相關部分。
的JavaScript:
<script type="text/javascript">
var viewModel;
var update = setInterval(function() {
$.getJSON(
"/Home/Get", {},
function (model) {
viewModel = model;
bindViewModel(viewModel);
});
}, 10000);
$(document).ready(
function() {
$.getJSON(
"/Home/Get", {},
function (model) {
viewModel = model;
bindViewModel(viewModel);
});
});
function bindViewModel(viewModel) {
ko.applyBindings(viewModel);
}
</script>
表中顯示型號
<div data-bind="foreach: { data: Events, as: 'evnts' }">
<span data-bind="text: evnts.LastUpdate"></span>
<table id="EventsTable" style="display:inline; float:left;">
<tbody>
<tr id="EvntsHeader" data-bind="visible: evnts.IsVisible">
<td>
<span data-bind="text: evnts.Name"></span>
</td>
<tr>
<td>
<table id="MarketsTable">
<tbody data-bind="foreach: { data: evnts.Markets, as: 'markets' }">
<tr>
<td id="MarketHeader">
<span data-bind="text: markets.Name"></span>
<span data-bind="text: markets.NumberOfRunners"></span>
</td>
</tr>
<tr>
<td>
<table id="SelectionTable">
<tbody data-bind="foreach: { data: markets.Selections, as: 'selections' }">
<tr id="Selections">
<td><span data-bind="text: selections.Number, visible: selections.IsVisible"></span></td>
<td><span data-bind="text: selections.Name, visible: selections.IsVisible"></span></td>
<td><span data-bind="text: selections.CurrentPrice, visible: selections.IsVisible"></span></td>
<td><span data-bind="text: selections.OpeningPrice, visible: selections.IsVisible"></span></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
Controlller - JSON獲取
[AcceptVerbs(HttpVerbs.Get)]
public JsonResult Get()
{
var model = new TestModel {LastUpdate = DateTime.Now};
if (TestConstants.Update == false)
{
GetModelFirstTime(model);
TestConstants.Update = true;
}
else
{
UpdateModel(model, DateTime.Now);
}
return Json(model, JsonRequestBehavior.AllowGet);
}
嘗試這和我仍然遇到同樣的問題。 –