[英]Knockout - Instead of the data-bind value, javascript is displayed
我創建了一個ASP.Net MVC 5
項目,並使用了Knockout.js
庫。
我有一個名為Statement
的View
,它基本上顯示了一個帶有幾個Transaction
項目的表。
我完整的Statement.cshtml
如下:
@using Newtonsoft.Json;
@model IEnumerable<ATMMVCLearning.Models.Transaction>
@{
ViewBag.Title = "Statement";
}
<h2>Statement</h2>
<table class="table table-striped table-bordered">
<thead>
<tr>
<td><strong>Transaction ID</strong></td>
<td><strong>Amount</strong></td>
</tr>
</thead>
<tbody data-bind="foreach:currentTransactions">
<tr>
<td data-bind="text:Id"></td>
<td data-bind="text:formattedPrice"></td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="2">
<span data-bind="click:previousPage" class="glyphicon glyphicon-circle-arrow-left"
style="cursor:pointer;"></span>
<span data-bind="text:currentPage"></span>
<span data-bind="click:nextPage"class="glyphicon glyphicon-circle-arrow-right"
style="cursor:pointer;"></span>
</td>
</tr>
</tfoot>
</table>
<script src="~/Scripts/knockout-3.4.0.js"></script>
<script>
function formattedPrice(amount) {
var price = amount.toFixed(2);
return price;
}
function StatementViewModel() {
var self = this;
//properties
//note that there is a ko.observableArray for making bindings for array
self.transactions = @Html.Raw(JsonConvert.SerializeObject(Model, new JsonSerializerSettings {
ReferenceLoopHandling = ReferenceLoopHandling.Ignore}));
//TODO: embed transactions from server as JSON array
self.pageSize = 5; //number of transactions to display per page
self.currentPage = ko.observable(1); //the first observable. If the page changes, then the grid changes
self.currentTransactions = ko.computed(function () {
var startIndex = (self.currentPage() - 1) * self.pageSize; //because currentPage is an observable, we get the value by calling it like a function
var endIndex = startIndex + self.pageSize;
return self.transactions.slice(startIndex, endIndex);
});
//methods to move the page forward and backward
self.nextPage = function () {
self.currentPage(self.currentPage() + 1);
};
self.previousPage = function () {
self.currentPage(self.currentPage() - 1);
};
};
ko.applyBindings(new StatementViewModel()); //note this apply bindings, used extensively in KnockOut
</script>
如您在<tbody>
所見,我有兩個具有數據綁定屬性的<td>
元素:
<tbody data-bind="foreach:currentTransactions">
<tr>
<td data-bind="text:Id"></td>
<td data-bind="text:formattedPrice"></td>
</tr>
</tbody>
而且formattedPrice
可以參考下面的腳本部分:
function formattedPrice(amount) {
var price = amount.toFixed(2);
return price;
}
現在,我希望結果視圖在呈現時應該在每個頁面上顯示一個包含5個事務的表,其中每個表行都顯示一個ID及其事務量。 即類似:
1 100.00
2 150.00
3 -40.00
4 111.11
5 787.33
但是,渲染頁面時,得到以下結果:
我沒有Id和金額 ,而是獲得了Id和javascript 。
任何想法?
更新:
Transaction
類如下:
public class Transaction {
public int Id { get; set; } //this is internally used, not need to have anything
[Required]
[DataType(DataType.Currency)]
public decimal Amount { get; set; }
[Required]
public int CheckingAccountId{ get; set; }
public virtual CheckingAccount CheckingAccount { get; set; } //this is to force the entity framework to recognize this as a foreign key
}
由於formattedPrice
不在視圖模型中,因此Knockout不會自動對其進行包裝,也不會將其傳遞給amount
參數。
嘗試以下方法:
<td data-bind="text: formattedPrice(Amount)"></td>
價格可能需要計算字段,並且您需要綁定價格(我認為)。 自從我做了Knockoutjs以來已經有一段時間了。
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