问题描述

我想将自定义属性添加到 Application Insights应用的每个请求所采用的指标中.例如，我想添加用户登录和租户代码，例如我可以在 Azure 门户中对指标进行分段/分组.

I d'like to add custom properties to metrics taken by Application Insights to each request of my app. For example, I want to add the user login and the tenant code, such as I can segment/group the metrics in the Azure portal.

相关的文档页面似乎是这个:设置默认属性值

The relevant doc page seems to be this one : Set default property values

但该示例是针对事件(即 gameTelemetry.TrackEvent("WinGame");)，而不是针对 HTTP 请求:

But the example is for an event (i.e. gameTelemetry.TrackEvent("WinGame");), not for an HTTP request :

var context = new TelemetryContext();
context.Properties["Game"] = currentGame.Name;
var gameTelemetry = new TelemetryClient(context);
gameTelemetry.TrackEvent("WinGame");

我的问题:

1. 请求的相关代码是什么，因为我目前没有特定代码(它似乎由 App Insights SDK 自动管理):仅创建一个 TelemetryContext 就足够了吗?我还应该创建一个 TelemetryClient 吗?如果是，我应该将它链接到当前请求吗?怎么样?
2. 我应该把这段代码放在哪里?global.asax 的 Application_BeginRequest 方法可以吗?

1. What is the relevant code for a request, as I have no specific code at this time (it seems to be automatically managed by the App Insights SDK) : Is just creating a TelemetryContext sufficient ? Should I create also a TelemetryClient and if so, should I link it to the current request ? How ?
2. Where should I put this code ? Is it ok in the Application_BeginRequest method of global.asax ?

推荐答案

看起来可以使用提到的 ITelemetryInitializer 向现有请求添加新属性 这里.

It looks like adding new properties to existing request is possible using ITelemetryInitializer as mentioned here.

我创建了如下所示的示例类，并添加了名为LoggedInUser"的新属性来请求遥测.

I created sample class as given below and added new property called "LoggedInUser" to request telemetry.

public class CustomTelemetry : ITelemetryInitializer
{
    public void Initialize(ITelemetry telemetry)
    {
        var requestTelemetry = telemetry as RequestTelemetry;
        if (requestTelemetry == null) return;
        requestTelemetry.Properties.Add("LoggedInUserName", "DummyUser");

    }
}

在应用程序启动事件中注册此类.下面的示例是从我创建的示例 MVC 应用程序中提取的

Register this class at application start event. Example below is carved out of sample MVC application I created

 public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);

        TelemetryConfiguration.Active.TelemetryInitializers
    .Add(new CustomTelemetry());
    }
}

现在您可以看到自定义属性LoggedInUserName"显示在自定义请求属性组下.(请参阅下面的屏幕截图)

Now you can see custom property "LoggedInUserName" is displayed under Custom group of request properties. (please refer screen grab below)

Appinsight 与自定义属性

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