形式恩codeD的Javascript INT []不拾起模型绑定 [英] Form Encoded Javascript int[] not Picked up By Model Binder

问题描述

昨天晚上，我试着放在一起的东西，我有自MVC2工作。

Last night I tried to put together something that I have had working since MVC2.

由于以下类：

public class RouteSaveViewModel
{
    public string Title { get; set; }
    public string Comments { get; set; }
    public string DepartureDate { get; set; }
    public string ArrivalDate { get; set; }
    public List<int> LocationIds { get; set; }
}

...以下动作：

...and the action below:

    [HttpPost]
    public ViewResult SaveRoute(RouteSaveViewModel route)
    {
        // yada yada
        return SomethingShiny();
    }

我想在使用$阿贾克斯或.post的$的数据传递。形式是多步来收集用户数据并提交。在code我用它来构建的位置标识了是这样的：

I would like to pass in the data using a $.ajax or $.post. The form is multi-step to collect data from the user and submit it. The code I use to build the location Ids up is this:

        var routeStopIds = [];
        $(".route-stop").each(function(){
            routeStopIds.push($(this).attr('data-id'));
        });

我已经证实没有我预期的ID是这个数组中通过浏览器的开发工具和小提琴手。最后，提交数据，我映射出的对象，因为我在$ P $做过pvious MVC构建：

I have verified that there the ids I expect are in this array through in-browser dev tools and fiddler. Finally, to submit the data, I'm mapping out the object as I've done in previous MVC builds:

        $.ajax({
            type: 'post',
            url: postUrl,
            data: {
                Title: $("#route-title").val(),
                Comments: $("#route-description").val(),
                DepartureDate: depDate,
                ArrivalDate: arrDate,
                LocationIds: routeStopIds                    
            },
            dataType: 'JSON'
        });

我所看到的是，的所有的数据 - 除了 LocationIds 参数填充。我也试过，只是在 routeStopIds 阵列提交修改后的 SaveRoute 只接受清单＆LT; INT＆GT; 并没有出现被任何工作。无论哪种方式， LocationIds 为空，虽然有一个表单恩codeD在请求中的表单参数值。

What I'm seeing is that all data - except the LocationIds param is populated. I have also tried to submit just the routeStopIds array to a modified SaveRoute that only accepts a List<int> and that doesn't appear to be working either. Either way, LocationIds is null, though there is a form-encoded value in the form parameters on the request.

{LocationIds%5b%5d=44&LocationIds%5b%5d=4&LocationIds%5b%5d=2}

...然而在HttpValueCollection就是 LocationIds [] ，空数组。

所以，我失去了一些东西明显？也许不那么明显吗？我如何获取数组由模型绑定拾取？

So, am I missing something obvious? Maybe not-so-obvious? How do I get the array to be picked up by model binding?

推荐答案

记住那段，我说我有它，因为MVC2工作吗？啊，这是在这里：
高级模型绑定在那文章中，我明确提及以下内容：

Remember that part where I said I had it working since MVC2? Yeah, that was here: Advanced Model Binding In that post I explicitly mentioned the following:

注意：为了使阵列的结果与兼容
  在ASP.NET MVC中绑定机制（截至M​​VC 2.0），我们需要使用
  传统的设置在$阿贾克斯（）。

Note: In order to make the results of the array compatible with the binding mechanism in ASP.NET MVC (as at MVC 2.0) we need to use the ‘traditional’ setting in $.ajax().

修改Ajax调用包含此设置被修复。所有是正确的雨水和柔软的羊毛小猫。或手套或什么的。

Modifying the ajax call to include this setting was the fix. All is right as rain and soft woolen kittens. Or mittens or whatever.

        $.ajax({
            type: 'post',
            url: postUrl,
            traditional: true, // <----- here be kittens
            data: {

                Title: $("#route-title").val(),
                Comments: $("#route-description").val(),
                DepartureDate: depDate,
                ArrivalDate: arrDate,
                LocationIds: routeStopIds 
            },
            dataType: 'JSON'
        });

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