Error after deploying asp.net core app to azure

Question

After deploying my asp.net core app to azure for the first time and ran it, I got the following error:

Error. An error occurred while processing your requ

Answer 1

thanks for your comments. I was able to find error details by adding the following key in application settings in azure portal: ASPNETCORE_ENVIRONMENT with value: Development

I have created a new question regarding the error itself: InvalidOperationException: Could not find 'UserSecretsIdAttribute' on assembly

Thank you

Answer 2

It is a security measure used in production mode so that any user does not got sensitive exception information from our app.

You can change ASPNETCORE_ENVIRONMENT from "Production" to "Development".

Another option is to change the code for the Configure () method in Startup.cs. It is this method makes a validation:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Error");
    }

    ...
}

It is not recommended, but you can eliminate this condition:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.UseDeveloperExceptionPage();
    ...
}

Answer 3

Just so it's clear - still something that comes up in ASP.NET Core 2.0 - and as @Techy stated - is in Azure. Go to Azure, click on your Web App –> "Applications Settings" –> go down to the “App Settings” section and add the “ASPNETCORE_ENVIRONMENT” and “Development”