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我是 Ajax 新手，我正在尝试使用 jquery 通过 ajax 调用从数据库中获取数据。

我有一个国家选项卡列表，我正在尝试在有用户操作时显示数据

这是我的代码示例，目前它说有一个空系统引用。

 public ActionResult Details(int id, string searchTerm)
        {
            // Do we have a search term
            if (!String.IsNullOrEmpty(searchTerm))
            {
                // decode the searchTerm as we dont want to search for encoded bits
                searchTerm = Decode(searchTerm);
            }
        var a = _mRepository.GetMyId(id);
        if (a == null)
        {
            return View("NotFound");
        }


       // Here we need to get list of countries for the selected manufacturer

        var c = _mwRepository.Getcountries(id);

        ViewData["Countries"] = c.ToArray();



        // Now we need list of products for the manufacturer countries and this is an Ajax call to database so that it fetches data only when there is a user action
        foreach (var country in c)
        {
            var p = _productRepository.GetAllCurrentProductsForManufacturerCountry(id, 
               country.Id);

        }
            if(Request.IsAjaxRequest())
            {
                                  ViewData["ManufacturerCountryProducts"] = 

                                  p.ToArray();
            }
4

1 回答 1

2 
public class CountryProducts
{
    public Country Country { get; set; }
    public List<Product> ProductsList { get; set; }
}

[HttpPost]
public ActionResult Details( int id, string searchTerm )
{
    // Do we have a search term
    if ( !String.IsNullOrEmpty( searchTerm ) )
    {
        // decode the searchTerm as we dont want to search for encoded bits
        searchTerm = Decode( searchTerm );
    }
    var a = _mRepository.GetMyId( id );
    if ( a == null )
    {
        return View( "NotFound" );
    }

    // Here we need to get list of countries for the selected manufacturer
    List<Country> countriesList = _mwRepository.Getcountries( id );

    var data = new List<CountryProducts>();
    if ( countriesList != null )
    {
        foreach (var country in countriesList)
        {
            List<Product> products = _productRepository.GetAllCurrentProductsForManufacturerCountry(id,
                                                                                                    country.Id);
            data.Add(new CountryProducts() {Country = country, ProductsList = products});
        }
    }

    if (Request.IsAjaxRequest())
    {
        ViewData["CountryProducts"] = data.ToArray();
    }
}

但我对 ajax 使用了两种不同的方法，例如：

public ActionResult Details( int id )
{
    ...
    return View(model);
}

//for ajax request:
[HttpGet]
public JsonResult Details( int id, string searchTerm )
{
    return new JsonResult()
               {
                   JsonRequestBehavior = JsonRequestBehavior.AllowGet,
                   Data = GetFilteredDetailsData(id, searchTerm)
               };
}
于 2012-09-03T11:14:58.233 回答