Question

我正在使用ApiController，我无法接受调用以返回除XML之外的任何内容。

class CountryCatalogue(Country):
def __init__(self, filename = "", name = "", pop = 0, area = 0, continent = ""):
    cDictionary = {}               #Initializing the cDictionary and catalogue here leads to errors in other functions
    catalogue = []
    super().__init__(name = "",pop = 0,area = 0,continent = "")
    fillcdict  =  open("continent.txt")       #not really important for the problem
    linescdict  =  fillcdict.readlines()[1:]
    for line in linescdict:
        entries1 = line.split(",")
        country = str(entries1[0])
        continentwrong = str(entries1[1])
        entries2 = continentwrong.split ("\n")
        continent = str(entries2[0])
        cDictionary["keywords"] = country
        cDictionary["values"] = continent
    self._continent = continent
    fillcatdict = open(filename)
    linescatalogue  =  fillcatdict.readlines()[1:]
    for line in linescatalogue:
        entries = line.split("|")
        countrydata = str(entries[0])
        populationdata = entries[1]
        areadata = entries[2]
        catalogue.append(countrydata)

def findCountry(self):     #So, when I try and use catalogue in this function I get a 'unresolved reference' note in Pycharm and a "invalid variable' error if I run the problem
    findcountinp = input("Please enter a country name: ")
    if findcountinp in catalogue:
        return self._name+"|"+self._continent+"|"+self._area+"|"+self._population
    else:
        return "Country not found!"

理想情况下，我想正常返回JSON，但我决定返回原始字符串而不是XML包装。

Answer 1

确保api仅返回JSON的一种简单方法是从http配置中删除xml格式化程序。

您可以访问WebApiConfig类

中的格式化程序

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

        //Clear current formatters
        config.Formatters.Clear();

        //Add only a json formatter
        config.Formatters.Add(new JsonMediaTypeFormatter());

    }
}

<强>更新

不要序列化控制器中的对象。只需按原样返回对象即可。 Web api将为您执行此操作，因为您已将json格式化程序附加到配置中。

public class GuideController : ApiController
{
    [AcceptVerbs("GET")]

    [HttpGet]
    public IHttpActionResult Get()
    {
        Item item = Item.GetTestData();
        return Ok(item);
    }
}

Answer 2

尝试在客户端中设置Accept标头。如果要接收JSON，请设置

接受：application / json

在您的客户端。希望有所帮助。

Answer 3

尝试显式返回JSON。

[HttpGet]
public IHttpActionResult Get()
{
    Item item = Item.GetTestData();       
    return Json(item);
}

C＃API返回字符串而不是XML包装字符串

3 个答案: