我正在使用本教程中的代码，并且在供应JSON上的典范中非常出色。
。虽然这与单个对象非常好，但是当我从URL中恢复数组时，这无法处理。我尝试调整代码处理数组，但我认为上述代码目前比我的成绩高一步。
有人可以帮我找出我在做错什么吗？
这是我要工作的代码：
public static T[] GetEdmundsContents<T>(string url) where T : new()
{
using (var client = new WebClient())
{
var jsonData = string.Empty;
try
{
Sleep(1000);
jsonData = client.DownloadString(url);
}
catch (Exception ex)
{
throw ex;
}
return !string.IsNullOrEmpty(jsonData) ? JsonConvert.DeserializeObject<T[]>(jsonData) : new T();
}
}
static void Sleep(int ms)
{
new System.Threading.ManualResetEvent(false).WaitOne(ms);
}
这是我从Web服务回来的JSON（缩写）：
[
{
"authorNames": [
"Audi Press AG"
],
"captionTranscript": "2013 Audi A6 3.0T Premium quattro Sedan Cargo Area",
"type": "PHOTOS",
"subType": "interior",
"shotTypeAbbreviation": "CARGO",
"photoSrcs": [
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_150.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_87.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_131.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_423.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_396.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_175.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_500.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_600.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_1600.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_400.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_2048.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_98.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_276.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_300.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_815.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_717.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_196.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_cargo_oem_1_185.jpg"
]
},
{
"authorNames": [
"Audi Press AG"
],
"captionTranscript": "2013 Audi A6 3.0T Premium quattro Sedan Interior",
"type": "PHOTOS",
"subType": "interior",
"shotTypeAbbreviation": "I",
"photoSrcs": [
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_396.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_196.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_276.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_185.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_175.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_300.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_500.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_423.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_131.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_150.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_600.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_2048.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_87.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_717.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_1600.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_400.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_98.jpg",
"/audi/a6/2013/oem/2013_audi_a6_sedan_30t-premium-quattro_i_oem_2_815.jpg"
]
}
]
您的代码不远。唯一的问题是这一行：
return !string.IsNullOrEmpty(jsonData)
? JsonConvert.DeserializeObject<T[]>(jsonData)
: new T();
应该是这样的：
return !string.IsNullOrEmpty(jsonData)
? JsonConvert.DeserializeObject<T[]>(jsonData)
: new T[]();
如果您愿意使用List<T>而不是T[]，则应该同样有效。然后，完整的方法将看起来像以下内容（请注意，我删除了尝试/捕获块，因为您没有做任何事情的例外 - 如果您只是要重新捕获，则无需抓住）：
public static List<T> GetEdmundsContents<T>(string url) where T : new()
{
using (var client = new WebClient())
{
Sleep(1000);
string jsonData = client.DownloadString(url);
return !string.IsNullOrEmpty(jsonData)
? JsonConvert.DeserializeObject<List<T>>(jsonData)
: new List<T>();
}
}
对于您发布的JSON，T应该是这样的类：
class CarSpec
{
public List<string> authorNames { get; set; }
public string captionTranscript { get; set; }
public string type { get; set; }
public string subType { get; set; }
public string shotTypeAbbreviation { get; set; }
public List<string> photoSrcs { get; set; }
}
然后您可以这样调用您的方法：
List<CarSpec> specs = GetEdmundsContents<List<CarSpec>>(url);