未捕获错误：初始化可观察数组时传递的参数必须是数组，或者为null或未定义。

为什么这不起作用？

<script>
    function Account(id, name, balance, deposits) {
        this.Id = id;
        this.Name = name;
        this.Balance = balance;
        this.Deposits = deposits;
    }
    var myAccountViewModel = function ()
    {
        this.Accounts = ko.observableArray([
              new Account(1, "A1", 100, [1,2]),
              new Account(2, "A2", 200, [2]),
              new Account(3, "A3", 300, [2, 3]),
              new Account(4, "A4", 400, [2,3]),
        ])
    }
    ko.applyBindings(myAccountViewModel);
</script>

HTML

<table>
    <thead>
        <tr>
            <th>S.No</th>
            <th>ID</th>
            <th>Name</th>
            <th>Balance</th>
        </tr>
    </thead>
    <tbody data-bind="foreach: {data:Accounts, as:'Account'}">
        <tr>
            <td data-bind="text:($index()+1)"></td>
            <td data-bind="text:Account.Id"></td>
            <td data-bind="text:Account.Name"></td>
            <td data-bind="text:Account.Balance"></td>
            <!--<td>
                <ul data-bind="foreach: {data:Deposits, as:'Amount'}">
                    <li data-bind="text:(Account().Name + 'Deposited ' + Amount())"></li>
                </ul>
            </td>-->
        </tr>
    </tbody>
</table>

Answer 1

问题中的代码对我有用。以下是适用于@alwaysVBNET的版本。 - 它基本上是问题中代码的内容，稍作修改。我从http://knockoutjs.com/downloads/knockout-3.4.2.js

下载了KO 3.4.2

主要的变化是在将temp变量添加到可观察数组之前使用它来实例化Account个对象。如果有人能解释为什么这会产生影响，我会很感兴趣。

<!doctype html>
<html>
<head>
<title>KO js test</title>
<script src=./knockout-3.4.2.js></script>

</head>
<body>
<table>
    <thead>
        <tr>
            <th>S.No</th>
            <th>ID</th>
            <th>Name</th>
            <th>Balance</th>
        </tr>
    </thead>
    <tbody data-bind="foreach: {data:Accounts, as:'Account'}">
        <tr>
            <td data-bind="text:($index()+1)"></td>
            <td data-bind="text:Account.Id"></td>
            <td data-bind="text:Account.Name"></td>
            <td data-bind="text:Account.Balance"></td>
            <td>
                <ul data-bind="foreach: {data:Deposits, as:'Amount'}">
                    <li data-bind="text:(Account.Name + 'Deposited ' + Amount)"></li>
                </ul>
            </td>
        </tr>
    </tbody>
</table>
<script>
    "use strict";
    function Account(id, name, balance, deposits) {
        var self = this;
        self.Id = id;
        self.Name = name;
        self.Balance = balance;
        self.Deposits = deposits;
    }
    var MyAccountViewModel = function ()
    {
        var self = this;
        self.Accounts = ko.observableArray();
        var temp = new Account(1, "A1", 100, [1,2]);
        self.Accounts.push(temp);
        temp = new Account(2, "A2", 200, [2]);
        self.Accounts.push(temp);
        temp = new Account(3, "A3", 300, [2, 3]);
        self.Accounts.push(temp);
        temp = new Account(4, "A4", 400, [2,3]);
        self.Accounts.push(temp);
    }
    ko.applyBindings(new MyAccountViewModel());
</script>
</body>
</html>

可观察数组中的子数组

未捕获错误：初始化可观察数组时传递的参数必须是数组，或者为null或未定义。

1 个答案: