我有一个项目通过构造函数使用依赖项注入，并使用 Azure Function 2.0 从 ASP.NET Core 进行 MS 日志记录，该项目在本地和 Azure 上的 2.0.12333 下运行，现在有以下两个问题：
1）通过构造函数进行依赖注入抛出异常，这之前是有效的。
2) 日志记录不再写入文本文件，这在以前是有效的。
下面是演示上述问题 1 的示例代码。
1）通过构造函数进行依赖注入抛出异常
下面的异常后面是示例代码：
2019-03-15T01:28:45.311 [Error] Executed 'Test' (Failed, Id=6bdb0e8e-2353-4ed2-83ce-2a5288fd124d)
System.InvalidOperationException : Unable to resolve service for type 'ICar' while attempting to activate 'TestFunctions'.
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp,Type type,Type requiredBy,Boolean isDefaultParameterRequired)
at lambda_method(Closure ,IServiceProvider ,Object[] )
at Microsoft.Azure.WebJobs.Host.Executors.DefaultJobActivator.CreateInstance[T](IServiceProvider serviceProvider) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\DefaultJobActivator.cs : 42
at Microsoft.Azure.WebJobs.Host.Executors.DefaultJobActivator.CreateInstance[T](IFunctionInstanceEx functionInstance) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\DefaultJobActivator.cs : 32
at Microsoft.Azure.WebJobs.Host.Executors.ActivatorInstanceFactory`1.<>c__DisplayClass1_1.<.ctor>b__0(IFunctionInstanceEx i) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\ActivatorInstanceFactory.cs : 20
at Microsoft.Azure.WebJobs.Host.Executors.ActivatorInstanceFactory`1.Create(IFunctionInstanceEx functionInstance) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\ActivatorInstanceFactory.cs : 26
at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker`2.CreateInstance(IFunctionInstanceEx functionInstance) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionInvoker.cs : 44
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ParameterHelper.Initialize() at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 845
at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsyncCore(IFunctionInstanceEx functionInstance,CancellationToken cancellationToken) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 116
示例代码如下：
public class TestFunctions
{
private readonly ICar _car;
private readonly ILogger _log;
private const string RouteTemplate = "";
public TestFunctions(
ICar car,
ILoggerFactory loggerFactor)
{
_car = car;
_log = loggerFactor.CreateLogger<TestFunctions>();
}
[FunctionName(nameof(Test))]
public IActionResult Test(
[HttpTrigger(AuthorizationLevel.Anonymous,"Get","post", Route = RouteTemplate + nameof(Test))]
HttpRequest httpRequest, ExecutionContext context)
{
_log.LogInformation($"{nameof(Test)} started processing the request.");
return new ContentResult { StatusCode = 200, Content = $"OK" };
}
}
public interface ICar
{
string Name { get; }
}
public class Car : ICar
{
public string Name { get => "car name"; }
}
[assembly: WebJobsStartup(typeof(WebJobsStartup))]
public class WebJobsStartup : IWebJobsStartup
{
public void Configure(IWebJobsBuilder builder)
{
builder.Services.AddHttpClient();
builder.Services.AddSingleton<ICar, Car>();
builder.Services.AddLogging();
}
}
主机.json
{
"version": "2.0",
"extensions": {
"http": {
"routePrefix": "api/v1"
}
},
"logging": {
"fileLoggingMode": "always",
"logLevel": {
"default": "Information"
}
}
}
2) 日志记录不再写入文本文件
当通过构造函数进行依赖注入时，TestFunctions，被删除，则Test方法被调用。但是，内的日志记录Test方法不是将内容写入文件。
同样，DI 和日志记录之前都可以正常工作。
public TestFunctions(
//ICar car,
ILoggerFactory loggerFactor)
{}
日志内的信息Test method
_log.LogInformation($"{nameof(Test)} started processing the request.");
内的日志记录Test方法不是将内容写入文件。
2019-03-15T01:34:56.360 [Information] Initializing Host. 2019-03-15T01:34:56.371 [Information] Host initialization: ConsecutiveErrors=0, StartupCount=1 2019-03-15T01:34:56.440 [Information] ApplicationInsightsLoggerOptions { "SamplingSettings": {
"EvaluationInterval": "00:00:15",
"InitialSamplingPercentage": 100.0,
"MaxSamplingPercentage": 100.0,
"MaxTelemetryItemsPerSecond": 5.0,
"MinSamplingPercentage": 0.1,
"MovingAverageRatio": 0.25,
"SamplingPercentageDecreaseTimeout": "00:02:00",
"SamplingPercentageIncreaseTimeout": "00:15:00" }, "SnapshotConfiguration": null } 2019-03-15T01:34:56.441 [Information] LoggerFilterOptions { "MinLevel": "None", "Rules": [
{
"ProviderName": null,
"CategoryName": null,
"LogLevel": null,
"Filter": "<AddFilter>b__0"
},
{
"ProviderName": null,
"CategoryName": null,
"LogLevel": "Information",
"Filter": null
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
"CategoryName": null,
"LogLevel": "None",
"Filter": null
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
"CategoryName": null,
"LogLevel": null,
"Filter": "<AddFilter>b__0"
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Logging.ApplicationInsights.ApplicationInsightsLoggerProvider",
"CategoryName": null,
"LogLevel": "Trace",
"Filter": null
} ] } 2019-03-15T01:34:56.441 [Information] LoggerFilterOptions { "MinLevel": "None", "Rules": [
{
"ProviderName": null,
"CategoryName": null,
"LogLevel": null,
"Filter": "<AddFilter>b__0"
},
{
"ProviderName": null,
"CategoryName": null,
"LogLevel": "Information",
"Filter": null
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
"CategoryName": null,
"LogLevel": "None",
"Filter": null
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
"CategoryName": null,
"LogLevel": null,
"Filter": "<AddFilter>b__0"
},
{
"ProviderName": "Microsoft.Azure.WebJobs.Logging.ApplicationInsights.ApplicationInsightsLoggerProvider",
"CategoryName": null,
"LogLevel": "Trace",
"Filter": null
} ] }
2019-03-15T01:34:56.441 [Information] FunctionResultAggregatorOptions
{
"BatchSize": 1000,
"FlushTimeout": "00:00:30",
"IsEnabled": true
}
2019-03-15T01:34:56.441 [Information] SingletonOptions
{
"LockPeriod": "00:00:15",
"ListenerLockPeriod": "00:00:15",
"LockAcquisitionTimeout": "10675199.02:48:05.4775807",
"LockAcquisitionPollingInterval": "00:00:05",
"ListenerLockRecoveryPollingInterval": "00:01:00"
}
2019-03-15T01:34:56.448 [Information] Starting JobHost
2019-03-15T01:34:56.451 [Information] Starting Host (HostId=My-azureportal, InstanceId=id, Version=2.0.12353.0, ProcessId=5772, AppDomainId=1, InDebugMode=True, InDiagnosticMode=False, FunctionsExtensionVersion=~2)
2019-03-15T01:34:56.488 [Information] Loading functions metadata
2019-03-15T01:34:56.645 [Information] 1 functions loaded
2019-03-15T01:34:56.810 [Information] Generating 1 job function(s)
2019-03-15T01:34:56.868 [Information] Found the following functions:
TestFunctions.Test
2019-03-15T01:34:56.868 [Information] Host initialized (410ms)
2019-03-15T01:34:56.877 [Information] Host started (418ms)
2019-03-15T01:34:56.877 [Information] Job host started
2019-03-15T01:34:57.324 [Information] Executing 'Test' (Reason='This function was programmatically called via the host APIs.', Id=my id)
2019-03-15T01:34:57.370 [Information] Executed 'Test' (Succeeded, Id=my id)
2019-03-15T01:35:02.019 [Information] Host lock lease acquired by instance ID 'id'.
VS 2017
Azure 函数 2.x
