MVC 4控制器JsonResult

问题描述

我有一个与MVC中的控制器有关的问题.我想使用foreach在我的JsonResult GetAfmeldingen中循环.

I have a question related to my controller in MVC.I want to loop inside my JsonResult GetAfmeldingen using foreach.

但是我做的事情不会深入我的foreach这是我现在的代码

But what I do will not go inside my foreachhere is my code as it looks right now

public JsonResult GetJsonAfmeldingen()
{
    if (Functions.HasLoginCookie())
    {
        if (Models.Taken.ActID > 0)
        {
            foreach (var item in Talent.Afmelding.Fetch(null, Models.Taken.ActID, null, null))
            {
                return Json(item.Participant.CompleteName, JsonRequestBehavior.AllowGet);
            }

            return Json("Empty ?? ID = " + Models.Taken.ActID + "", JsonRequestBehavior.AllowGet);
        }
        else
        {
            return Json(null, JsonRequestBehavior.AllowGet);
        }
    }
    else
    {
        return Json(null, JsonRequestBehavior.AllowGet);
    }
}

在此示例中，当列表中的第一条记录命中时，我返回JsonResult.我一直在看是否可行，但没有成功. ID已填满，但我在这里想念的是什么?我是MVC的新手.

In this example, I return a JsonResult when the first record in my list hits. I've looked to see if it works but it doesn't. The id is filled but what am I missing here?I am new to MVC.

推荐答案

这可能不起作用，因为您无法进入foreach.

This is probably what doesn't work, since you cannot come into the foreach.

public JsonResult GetJsonAfmeldingen()
{
    if (Functions.HasLoginCookie())
    {
        //This one is probably not filled.
        if (Models.Taken.ActID > 0)
        {

这可能是一种解决方案:

This could be a possible solution:

public JsonResult GetJsonAfmeldingen(int actID)
{
    if (Functions.HasLoginCookie())
    {
        //Now it is filled if you post it correctly.
        if (actID > 0)
        {

然后尝试在较小的范围内对其进行测试.尝试在此行上有一个断点，看看列表是否已填充.

After that try to test it in a smaller scope. Try to have a breakpoint on this line and see if the list is filled.

    var listAfmeldingen = Talent.Afmelding.Fetch(null, Models.Taken.ActID, null, null);
    //Breakpoint here
    int count = listAfmeldingen.Count;
    foreach (var item in listAfmeldingen)
    {
        return Json(item.Participant.CompleteName, JsonRequestBehavior.AllowGet);
    }

也请看一下您的路由，我使用这个:

Have a look at your routing as well, I use this one:

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );

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