在Appinsight请求日志中修改userId时遇到很大麻烦。如果我在下面的代码下创建新的Appinsight环境，效果很好！但是，如果我在现有应用程序中使用以下代码，则不能更改UserId或其他REQUEST属性或PageView属性。我之前的开发人员使用向导创建了appinsight。我不知道为什么我不能更改用户ID值。我该如何修改？是否有任何配置文件可用于更改修改appinsight上下文的属性。我的项目是Asp.net core 2.2。我正在使用“ microsoft.ApplicationInsights；”作为nuget包。

StreamReader sr = new StreamReader(@"c:\test.txt",Encoding.UTF8); 
int richTextBoxCursor = 0;

while (!sr.EndOfStream){

   richTextBoxCursor = richTextBox.TextLength;

   string line = sr.ReadLine();
   line = line.Replace(Convert.ToChar(0x0).ToString(),"NUL");
   richTextBox.AppendText(line);

   i = 0;

   while(true){
     i = line.IndexOf("NUL",i) ;
     if(i == -1) break;

     // This specific select function select text start from a certain start index to certain specified character range passed as second parameter
     // i is the start index of each found "NUL" word in our read line
     // 3 is the character range because "NUL" word has three characters
     richTextBox.Select(richTextBoxCursor + i,3);

     richTextBox.SelectionColor = Color.White;
     richTextBox.SelectionBackColor = Color.Black;

     i++;
   }

}

Startup.cs：

public class MyTelemetryInitializer : ITelemetryInitializer
{
    public MyTelemetryInitializer()
    {
    }

    public void Initialize(ITelemetry telemetry)
    {
        try
        {

                telemetry.Context.User.Id = "yusuf"; //=> NOT WORKING!!
                telemetry.Context.Cloud.RoleInstance = "test"; //=> NOT WORKING!!
                telemetry.Context.Properties["EventId"] = "deneme";

                ISupportProperties propTelemetry = (ISupportProperties)telemetry;

                if (propTelemetry.Properties.ContainsKey("EventId"))
                {
                    propTelemetry.Properties["EventId"] = "deneme2"; //=> Working!!!
                }


        }
        catch (Exception ex)
        {

            Trace.WriteLine(ex.Message);
        }
    }

}

Program.cs：

      public void ConfigureServices(IServiceCollection services)
    {
     ......
       .......
     services.AddSingleton<ITelemetryInitializer,MyTelemetryInitializer>(); 


        services.AddSession();
        ....
        }

如果我查看“ Application Insights搜索”，则可以看到Userid已更改：

但是当我在AZURE中查找Application Insgiht时，用户ID为空。