在 .NET Core 6.0 Razor 页面应用程序中配置 Serilog 的正确方法是什么？

Question

I'm trying to configure Serilog to work with a .NET 6 Razor page web application. I've tried following the aspnetcore directions here and applicationinsights here . Nothing I try seems to work. I see my enricher being hit but nothing is written to application insights.

The program.cs files looks like this:

using AppInsightsSerilogCustomDimensions;
using Microsoft.ApplicationInsights.Extensibility;
using Serilog;

Log.Logger = new LoggerConfiguration()
    .Enrich.With<SystemInfoEnricher>()
    .WriteTo.ApplicationInsights(TelemetryConfiguration.Active, TelemetryConverter.Traces)
    .CreateBootstrapLogger();

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();

builder.Host.UseSerilog((context, services, configuration) => configuration
    .ReadFrom.Configuration(context.Configuration)
    .ReadFrom.Services(services)
    .Enrich.With<SystemInfoEnricher>()
    .WriteTo.ApplicationInsights(TelemetryConfiguration.Active, TelemetryConverter.Traces));

// Error: No service for type 'Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration' has been registered.
//builder.Host.UseSerilog((context, services, configuration) => configuration
//    .ReadFrom.Configuration(context.Configuration)
//    .ReadFrom.Services(services)
//    .Enrich.With<SystemInfoEnricher>()
//    .WriteTo.ApplicationInsights(services.GetRequiredService<TelemetryConfiguration>(), TelemetryConverter.Traces));


var app = builder.Build();


// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();

app.Run();

I've configured my appsettings.json file according to the Microsoft docs here , but threw in an InstrumentationKey as well just in case that would help.

{
  "ApplicationInsights": {
    "InstrumentationKey": "--I put the key here--",
    "ConnectionString": "---I put a connection string here---"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Information"
    }
  },
  "AllowedHosts": "*"
}

I've been banging my head against this for 3 hours now and it just doesn't work. I've been able to configure application insight WITHOUT Serilog in the application and it logged to the Application Insights resource, but I just can't get it to work WITH Serilog.

I suspect it has something to do with the instrumentation key not being read since I see error No service for type 'Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration' when I uncomment the code in program.cs.

Any help would be appreciated.

Answer 1

• Your Instrumentation key is not configured properly.

Refer the below workaround

• Make sure you have below Nuget packages installed are updated

Serilog.Settings.Configuration
Serilog.AspNetCore
Serilog.Sinks.ApplicationInsights
Microsoft.ApplicationInsights.AspNetCore

Program.cs

  public static void Main(string[] args)
    {      
        CreateHostBuilder(args).Build().Run();       
    }
  public static IHostBuilder CreateHostBuilder(string[] args) =>
         Host.CreateDefaultBuilder(args)                   
           .UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
                    .ReadFrom.Configuration(hostingContext.Configuration)
                  .WriteTo.ApplicationInsights(TelemetryConfiguration.Active, TelemetryConverter.Traces)
             );   

Output:

References taken from:

Serilog.AspNetCore