我每天运行一个程序，转到API，以JSON格式获取一堆天气数据并将其存储在数据库中。它已经好几个月了，但从昨天开始，它已经失败了。我试图调试，无法弄清楚发生了什么。我得到一个有效的响应，格式与以前一样，并将其记录在控制台中或在断点处查看它，似乎没问题。但是，我得到了这个例外：
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException：无法执行 对空引用的运行时绑定 在CallSite.Target（Closure，CallSite，Object） 在System.Dynamic.UpdateDelegates.UpdateAndExecute1 [T0，TRet]（CallSite） 网站，T0 arg0） 在CallSite.Target（Closure，CallSite，Object） 在DbMgr.DarkSky.d__9.MoveNext（）在C：\ Users \ BaruchKogan \ documents \ visual studio 2017 \ Projects \ DbMgr \ DbMgr \ DarkSky.cs：第434行 pausedSystem.AggregateException：发生一个或多个错误。 ---＆GT; Microsoft.CSharp.RuntimeBinder.RuntimeBinderException ：无法对空引用执行运行时绑定 在DbMgr.DarkSky.d__9.MoveNext（）在C：\ Users \ BaruchKogan \ documents \ visual studio 2017 \ Projects \ DbMgr \ DbMgr \ DarkSky.cs：第461行 ---内部异常堆栈跟踪结束--- 在System.Threading.Tasks.Task.ThrowIfExceptional（Boolean includeTaskCanceledExceptions） 在System.Threading.Tasks.Task
1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task1.get_Result（） 在DbMgr.DarkSky.d__6.MoveNext（）在C：\ Users \ BaruchKogan \ documents \ visual studio 2017 \ Projects \ DbMgr \ DbMgr \ DarkSky.cs：第205行 ---＆GT; （内部异常＃0）Microsoft.CSharp.RuntimeBinder.RuntimeBinderException：无法执行 nul上的运行时绑定 我参考 在DbMgr.DarkSky.d__9.MoveNext（）在C：\ Users \ BaruchKogan \ documents \ visual studio 2017 \ Projects \ DbMgr \ DbMgr \ DarkSky.cs：第461行＆lt; ---
违规代码在这里：
Console.WriteLine(responseJson.daily.data[0]);
JObject darkSkyDaily = responseJson.daily.data[0];
if (DailyBreakdown(darkSkyDaily, plot, blobUri, false).Result != 0)
{
JArray darkSkyHourlies = responseJson.hourly.data;
if (darkSkyHourlies.Count > 0)
{
foreach (JObject item in darkSkyHourlies)
{
await HourlyBreakdown(item, plot.ID, false);
}
}
}
第435行是第一行，运行正常，并将有效的对象字符串写入控制台。
在这种特殊情况下，DailyBreakdown（）返回0，因为每日都在数据库中。
static async Task<int> DailyBreakdown(JObject daily, GeographicalPlot plot, String blobUri, Boolean isForecast)
{
using (var newEntities = new atpLabsDbEntities1())
{
try
{
DateTime dailyTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble((int)daily["time"]));
var testDailies = from c in newEntities.WeatherDailies
where c.GeographicalPlotID == plot.ID && c.Time == dailyTime
select c;
if ((testDailies.Count() == 0) || (isForecast == true))
{
string summary = (string)daily["summary"];
int sunsetTime = (int)daily["sunsetTime"];
int sunriseTime = (int)daily["sunriseTime"];
double? moonPhase = (double?)daily["moonPhase"];
string precipType = (string)daily["precipType"];
double? temperatureMin = (double?)daily["temperatureMin"];
double? temperatureMax = (double?)daily["temperatureMax"];
double? apparentTemperatureMin = (double?)daily["apparentTemperatureMin"];
double? apparentTemperatureMax = (double?)daily["apparentTemperatureMax"];
int temperatureMinTime = (int)daily["temperatureMinTime"];
int temperatureMaxTime = (int)daily["temperatureMaxTime"];
int apparentTemperatureMinTime = (int)daily["apparentTemperatureMinTime"];
int apparentTemperatureMaxTime = (int)daily["apparentTemperatureMaxTime"];
double? dewPoint = (double?)daily["dewPoint"];
double? humidity = (double?)daily["humidity"];
double? windSpeed = (double?)daily["windSpeed"];
double? windBearing = (double?)daily["windBearing"];
double? visibility = (double?)daily["visibility"];
double? cloudCover = (double?)daily["cloudCover"];
double? pressure = (double?)daily["pressure"];
dynamic newWeatherDaily;
if (isForecast == true)
{
newWeatherDaily = new WeatherDailyForecast();
newWeatherDaily.ForecastTime = DateTime.Now;
}
else
{
newWeatherDaily = new WeatherDaily();
}
newWeatherDaily.GeographicalPlotID = plot.ID;
newWeatherDaily.Time = dailyTime;
newWeatherDaily.Summary = summary;
newWeatherDaily.SunriseTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(sunriseTime));
newWeatherDaily.MoonPhase = moonPhase;
newWeatherDaily.SunsetTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(sunsetTime));
newWeatherDaily.PrecipType = precipType;
newWeatherDaily.TemperatureMin = temperatureMin;
newWeatherDaily.TemperatureMax = temperatureMax;
newWeatherDaily.ApparentTemperatureMax = apparentTemperatureMax;
newWeatherDaily.ApparentTemperatureMin = apparentTemperatureMin;
newWeatherDaily.TemperatureMinTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(temperatureMinTime));
newWeatherDaily.TemperatureMaxTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(temperatureMaxTime));
newWeatherDaily.ApparentTemperatureMinTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(apparentTemperatureMinTime));
newWeatherDaily.ApparentTemperatureMaxTime = new DateTime(1970, 1, 1, 0, 0, 0).AddSeconds(Convert.ToDouble(apparentTemperatureMaxTime));
newWeatherDaily.DewPoint = dewPoint;
newWeatherDaily.Humidity = humidity;
newWeatherDaily.WindBearing = windBearing;
newWeatherDaily.WindSpeed = windSpeed;
newWeatherDaily.Visibility = visibility;
newWeatherDaily.Pressure = pressure;
newWeatherDaily.CloudCover = cloudCover;
newWeatherDaily.BlobUri = blobUri;
if (isForecast == true)
{
newEntities.WeatherDailyForecasts.Add(newWeatherDaily);
}
else
{
newEntities.WeatherDailies.Add(newWeatherDaily);
}
int result = await newEntities.SaveChangesAsync();
return result;
}
else
{
return 0;
}
}
catch (Exception e)
{
Console.WriteLine(e);
throw e;
}
}
}
我摧毁了我的大脑，无法弄清楚哪条线实际上引发了异常，或者如何解释这一点。有什么想法吗？