ASP.NET MVC 3 Razor:初始化一个 JavaScript 数组 [英] ASP.NET MVC 3 Razor : Initialize a JavaScript array

问题描述

在 ASP.NET MVC 3 中使用 Razor 初始化 JS 数组的首选方法是什么，我的模型/视图模型中有一个值?

What would be the prefered way to initialize a JS array in ASP.NET MVC 3 with Razor with a value I have in my model/view model ?

例如初始化表示日期的字符串数组:

For example to initialize an array of strings representing dates :

<script type="text/javascript">
    var activeDates = ["7-21-2011", "7-22-2011"];
</script>

与

public class MyViewModel
{    
  public DateTime[] ActiveDates { get; set; }
}

推荐答案

我不太明白 JS 和 ASP.NET MVC 3 Razor 之间的关系.无论在服务器上使用哪种技术生成页面，Javascript 都在客户端运行.所以在 javascript 上，一个数组就是一个数组.

I don't quite understand the relation between JS and ASP.NET MVC 3 Razor. Javascript runs on the client side no matter which technology has been used on the server to generate the page. So on javascript an array is an array.

在 javascript 中定义对象数组有几种可能性

There are a couple of possibilities to define arrays of objects in javascript

var activeDates = [ '7-21-2011', '7-22-2011' ];

或:

var activeDates = new Array();
activeArrays.push('7-21-2011');
activeArrays.push('7-22-2011');

或尚未:

var activeDates = new Array();
activeArrays[0] = '7-21-2011';
activeArrays[1] = '7-22-2011';

最后所有这些都代表同一个数组.但它是一个字符串的数组，而不是日期.

At th end all those represent the same array. But it is an array of strings, not dates.

如果你想要一个日期数组，你可以这样做:

If you wanted to have an array of dates, here's what you could do:

var activeDates = [ 
    new Date(2011, 6, 21, 0, 0, 0, 0), 
    new Date(2011, 6, 22, 0, 0, 0, 0) 
];

现在我能看到的与您对 ASP.NET MVC 的问题的唯一关系是您的视图模型上可能有一些数组:

Now the only relation I can see with your question to ASP.NET MVC is that you probably have some array on your view model:

public class MyViewModel
{
    public DateTime[] ActiveDates { get; set; }
}

您想在 javascript 数组中序列化和操作.在这种情况下，语法如下:

that you wanted to serialize and manipulate in a javascript array. In this case here's the syntax:

@model MyViewModel
<script type="text/javascript">
    var activeDates = @Html.Raw(Json.Encode(Model.ActiveDates));
</script>

现在，由于 DateTime 字段在 .NET 中以 JSON 序列化的方式，您将在生成的 HTML 中得到以下内容:

Now because of the way DateTime fields are JSON serialized in .NET you will end up with the following in the generated HTML:

var activeDates = ["\/Date(1309471200000)\/","\/Date(1311199200000)\/"];

如果你想把这个字符串数组转换成一个实际的javascript日期数组:

and if you wanted to convert this array of strings into an array of actual javascript dates:

var dates = $.map(activeDates, function(date, index) {
    date = date.replace('/Date(', '').replace(')/', '');  
    return new Date(parseInt(date));
});

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