如何通过在 .netcore 2.2 中编写代码将 CustomUserId 发送到 Appinsight？

Question

I created app-insight application in azure to keep track of metrics. Everything looks fine and easy to see Req/Res.I did below steps: adding appsettings.json:

"ApplicationInsights": {
"InstrumentationKey": "xxxx-7a49-4bc1-yyyy-kkkkk"
},

And adding UseApplicationInsights in Program.cs

  public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .UseApplicationInsights()
            .UseStartup<Startup>();

but I want to send something to appinsight and see as a column when I write kusto query.

is there any way like below stuff:

 public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .UseApplicationInsights()
        .ChangeValue("UserId",Httphelper.GetCurrentUserId)
        .AddColumn("MyCustomField", Httphelper.Something)
            .UseStartup<Startup>();

Can I do that or any way to send or modify existed value? I Tried to find any article about it but I couldn't satisfied solution.

Answer 1

You can add it as a custom property via ITelemetryInitializer .

In the sample code, you just need a few modification to add a property like below:

  public class MyTelemetryInitializer : ITelemetryInitializer
  {
    public void Initialize(ITelemetry telemetry)
    {
      telemetry.Properties["customuserid"] = "your_id";
    }

 }

For how to register the ITelemetryInitializer to asp.net core project, please refer to this section " ASP.NET Core/ Worker Service apps: Load your initializer " in the above doc. A screenshot as below:

After you add the above code, then every telemetry data will include the custom property. Then in your kusto query, you can take use of this property.