Question

我正在使用knockoutjs将数据绑定到表，我想在用户点击时更新对象。这是我的代码

    var Books = [{Book:"Harry Potter",Author:"J.K rowling"},{Book:"5 Point Someone",Author:"Chetan Bhagat"},{Book:"I too had a love story",Author:"Ravinder Singh"}];

    var appViewModel = function() {
        this.firstName = ko.observable("Amit");
        this.Books = ko.observableArray([]);
        this.Books(Books);
        this.updateBook = function() {
            this.Book("Harry Potter and Prisoner of Azkaban");
        }
    };
    ko.applyBindings(appViewModel);

但它得到错误：“未捕获TypeError：字符串不是函数”。怎么解决它？

请参阅：http://jsfiddle.net/jVQY8/8/

Answer 1

您还需要将每个Book对象的属性设为observable。使用mapping插件（现在内置）：

this.Books = ko.mapping.fromJS(Books);

此外，当每个this引用不同的对象时，看到这些this.updateBook = function(book) { book.Book("Harry Potter and Prisoner of Azkaban"); };有点误导。常见的方法是：

Enterprise Applications > {app_name} > Class loader

请参阅Fiddle

如何从knockoutjs更新对象的值？

1 个答案: