如何创建一个ActionController以在运行时和使用ajax工作

Question

我有一个AddressBook控制器,它将返回一个"文件夹"列表(基本上是组/位置).这可以在渲染时通过AJAX请求或在MVC页面本身中调用.

如何创建一个适用于这两种情况的功能？这是我当前的Controller动作,我似乎很难在我的MVC页面中使用

public ActionResult GetFolderList(int? parent)
{
    List<String> folderList = new List<String>();
    folderList.Add("East Midlands");
    folderList.Add("West Midlands");
    folderList.Add("South West");
    folderList.Add("North East");
    folderList.Add("North West");

    return Json(folderList);
}

在页面内(不工作atm)

@{
    var controller = new My.Controllers.AddressBookController();
    var what = controller.GetFolderList(0);

    foreach(var p in what){
        //i want to get the list items here
    }
}

Answer 1

只需要一个返回的函数List,然后在你的页面加载和AJAX请求Action方法中调用它.

就像是:

public List<string> GetFolderList()
{
    List<String> folderList = new List<String>();
    folderList.Add("East Midlands");
    folderList.Add("West Midlands");
    folderList.Add("South West");
    folderList.Add("North East");
    folderList.Add("North West");

    return folderList;
}

然后在页面加载时,您可以将其粘贴在您的模型中:

public ActionResult Index()
{
    var model = new YourViewModel(); //whatever type the model is

    model.FolderList = GetFolderList(); //have a List<string> called FolderList on your model

    return View(model); //send model to your view
}

然后在您的视图中,您可以:

@model YourViewModel

@{
    foreach(var item in Model.FolderList){
        //do whatever you want
    }
}

然后,假设你的ajax请求是这样的:

$.ajax({
    url: '@Url.Action("GetFolders", "ControllerName")',
    type: 'POST',
    datatype: 'json',
    success: function (result) {
        for (var i = 0; i < result.length; i++)
        {
            //do whatever with result[i]
        }
    }
});

您的GetFolders操作方法如下所示:

public ActionResult GetFolders()
{
    return Json(GetFolderList());
}

Answer 2

这将有效:

public ActionResult GetFolderList(int? parent)
{
    List<String> folderList = new List<String>();
    folderList.Add("East Midlands");
    folderList.Add("West Midlands");
    folderList.Add("South West");
    folderList.Add("North East");
    folderList.Add("North West");

    if(Request.IsAjaxRequest())
    {
        return Json(folderList);
    }

    return View("someView", folderList );

}