返回使用JsonResult的ActionFilter上一个ActionResult在控制器 [英] Return JsonResult using an ActionFilter on an ActionResult in a controller

问题描述

我要回以不同的格式（的JavaScript / XML / JSON / HTML）使用ActionFilter的控制器的模型（数据）。下面是我在哪里至今：

I want to return the Model (data) of a controller in different formats (JavaScript/XML/JSON/HTML) using ActionFilter's. Here's where I'm at so far:

该ActionFilter：

The ActionFilter:

public class ResultFormatAttribute : ActionFilterAttribute, IResultFilter
{
    void IResultFilter.OnResultExecuting(ResultExecutingContext context)
    {
        var viewResult = context.Result as ViewResult;

        if (viewResult == null) return;

        context.Result = new JsonResult { Data = viewResult.ViewData.Model };
    }
}

而它的实现：

[ResultFormat]
public ActionResult Entries(String format)
{
    var dc = new Models.WeblogDataContext();

    var entries = dc.WeblogEntries.Select(e => e);

    return View(entries);
}

的 OnResultExecuting 方法被调用，但我没有得到的模型（数据）返回，并格式化为一个JSON对象。我刚才控制器呈现视图。




更新：我达林季米特洛夫的回答的建议，<跟随href=\"http://stackoverflow.com/questions/1656767/custom-objects-as-arguments-in-controller-methods-defined-by-maproutes/1657634#1657634\">this问题。

The OnResultExecuting method gets called, but I am not getting the Model (data) returned and formatted as a JSON object. My controller just renders the View.


Update: I am following the suggestion of Darin Dimitrov's answer to this question.

推荐答案

这就是我一直在寻找：

public class ResultFormatAttribute : ActionFilterAttribute, IActionFilter
{
    void IActionFilter.OnActionExecuted(ActionExecutedContext context)
    {
        context.Result = new JsonResult
        {
            Data = ((ViewResult)context.Result).ViewData.Model
        };
    }
}

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