Question 87532 in ASP.NET Question posted in
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How to track dependencies, exceptions and requests for Live Metrics in ASP.NET MVC app?

I’ve configured Live Metrics for my ASP.NET MVC app with target framework 4.7.2 using the tutorial given in Microsoft Docs:

https://learn.microsoft.com/en-us/azure/azure-monitor/app/live-stream#enable-livemetrics-using-code-for-any-net-application

In this tutorial, they’ve given a sample client.TrackDependency() and client.TrackRequest() call in the end. They’ve also mentioned in comments that those are samples and we must replace it with actual application logic to work. I’m new to all these and I don’t know what to replace. Since my application is huge and has a lot of methods, it is impractical to call the tracking methods in each method or controller. Since it is not ASP.NET Core, there are no middlewares and I have to enable Live Metrics by code too. I’ve added the code in the Application_Start() of Global.asax.cs of my application, so that it runs during startup.

This is what I’ve done so far,

// Create a TelemetryConfiguration instance.
Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration telemetryConfig = Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration.CreateDefault();
telemetryConfig.InstrumentationKey = System.Web.Configuration.WebConfigurationManager.AppSettings["AppInsightsInstrumentationKey"];
QuickPulseTelemetryProcessor quickPulseProcessor = null;
telemetryConfig.DefaultTelemetrySink.TelemetryProcessorChainBuilder
    .Use((next) =>
    {
        quickPulseProcessor = new QuickPulseTelemetryProcessor(next);
        return quickPulseProcessor;
    })
    .Build();

var quickPulseModule = new QuickPulseTelemetryModule();

// Secure the control channel.
// This is optional, but recommended.
//quickPulseModule.AuthenticationApiKey = "YOUR-API-KEY-HERE";
quickPulseModule.Initialize(telemetryConfig);
quickPulseModule.RegisterTelemetryProcessor(quickPulseProcessor);

// Create a TelemetryClient instance. It is important
// to use the same TelemetryConfiguration here as the one
// used to setup Live Metrics.
TelemetryClient client = new TelemetryClient(telemetryConfig);

// I need some method by which I can track all the requests, exceptions,
// dependencies etc. here.

I searched and searched a lot for a solution but couldn’t get a concrete solution. As a last resort I’m requesting you guys to help me. What can I do to track all requests, dependencies, exceptions, etc. globally…?

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I found a solution myself. I found out that I can use the Application_BeginRequest() event handler to catch all requests inside Global.asax itself. All I had to do is to store the TelemetryConfiguration into a global variable and access it from the Application_BeginRequest() handler. This is what I did:

    
using Microsoft.ApplicationInsights;
using Microsoft.ApplicationInsights.Extensibility;
using Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.QuickPulse;
 
protected void Application_Start()
{
  RegisterLiveMetrics();
  // Omitted the other code for brevity
}

protected void Application_BeginRequest(object sender, EventArgs e)
{
  var telemetryConfig = Application["TelemetryConfig"] as TelemetryConfiguration;
  TelemetryClient client = new TelemetryClient(telemetryConfig);

  var httpContextCurrent = HttpContext.Current;
  client.TrackRequest(httpContextCurrent.Request.RawUrl, DateTimeOffset.Now, 
  TimeSpan.FromMilliseconds(230), httpContextCurrent.Response.StatusCode.ToString(), 
  true);
}

private void RegisterLiveMetrics()
{
  // Create a TelemetryConfiguration instance.
Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration telemetryConfig = Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration.CreateDefault();
telemetryConfig.InstrumentationKey = System.Web.Configuration.WebConfigurationManager.AppSettings["AppInsightsInstrumentationKey"];
QuickPulseTelemetryProcessor quickPulseProcessor = null;
telemetryConfig.DefaultTelemetrySink.TelemetryProcessorChainBuilder
    .Use((next) =>
    {
        quickPulseProcessor = new QuickPulseTelemetryProcessor(next);
        return quickPulseProcessor;
    })
    .Build();

var quickPulseModule = new QuickPulseTelemetryModule();

quickPulseModule.Initialize(telemetryConfig);
quickPulseModule.RegisterTelemetryProcessor(quickPulseProcessor);

Application["TelemetryConfig"] = telemetryConfig;
}

    Luckily this seems to work fine. Currently I'm only tracking requests.

    Note: I'm not sure about the namespaces mentioned above.


  2. 0

    If you’re using the ASP .NET MVC with .Net Framework 4.7.2 Version, You need to configure the Application Insights code related to the .NET Specific SDK Type like Framework, Core, Console, etc.

    From the given MS doc, you’re following the console app related app insights code but as you’re using the MVC Web App so you need to follow this code from this section of documentation.

    Here is the workaround I tried to get the live metrics, logs in the Application Insights of Azure Portal.

    • In Visual Studio, Created the asp .net mvc web app (.NET Framework version 4.7.2)
    • Added the Application Insights Instrumentation Key in the ApplicationInsights.config
    • Follow the above documentation as it says to create a new folder in the root and add the ErrorHandler class and modify the FilterConfig class from the App_Start folder in order to match your ErrorHandler Class Functionality.
    • And then deploy the MVC Web App. While publishing configure the Application Insights in Visual Studio Publish Window like below:

    enter image description here

    After deploying the App, Open the Web App URL in the browser, then you can see the logs in overview tab and also in App Insights Resource Live Metrics Page as you can see the screenshots below:

    enter image description here

    enter image description here

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