Tuesday, November 28, 2017

Wrote a post on Wiki Life at Official Blog of TechNet Wiki

Wrote a post in Wiki Ninjas - Official Blog of TechNet Wiki. The title of the post is TNWiki Article Spotlight – Implementing Server Side validations in AngularJS.
image
TNWiki Article Spotlight – Implementing Server Side validations in AngularJS
Read the rest on,
TNWiki Article Spotlight – Implementing Server Side validations in AngularJS

Happy Coding.

Regards,
Jaliya

Sunday, November 26, 2017

Fiddler Doesn’t Capture All RavenDB REST API Calls

I was trying to figure out an issue in a Web Application that I am currently working on and it has a RavenDB backend.

The code was doing some operations on the RavenDB database (behind the scene those method calls gets translated into API calls to RavenDB REST API), and I was using Fiddler to trace the API calls to RavenDB. But apparently, only some of the API calls were listed on Fiddler and most of the calls were not present. But RavenDB logs showed that it is receiving calls, so I was bit confused why Fiddler isn’t capturing the calls.

Spent couple of hours changing Fiddler settings, RavenDB IIS Web Application settings, but output was still the same.

I had RavenDB IIS Web Application running on 8080 and I was using Url=http://localhost:8080;Database={MyDatabaseName} as the connection string. I just replaced localhost with my machine name and that was it. I am seeing all the API calls to RavenDB in fiddler.

So  if you want Fiddler to capture all RavenDB calls being made from your application, instead of having localhost or 127.0.0.1, use the machine name.

So now everything is in-place to find out the real issue, I am back to it.

Hope someone will find this helpful.

Happy Coding.

Regards,
Jaliya

Tuesday, November 21, 2017

Visual C# Technical Guru - October 2017

Another month as a judge in Microsoft TechNet Guru Awards under Visual C# category. The TechNet Guru Awards celebrate the technical articles on Microsoft TechNet.

Post in WikiNinjas Official Blog,
image
Visual C# Technical Guru - October 2017
Happy Coding.

Regards,
Jaliya

Friday, November 3, 2017

Azure PowerShell - Cloning App Service Slots

This is some set of scripts I keep using for cloning Azure App Service Slots. Hope someone will find it useful.
# Login
Login-AzureRmAccount
 
# List all subscriptions (this step is only useful if you have multiple subscriptions)
Get-AzureRmSubscription
 
# Select azure subscription (this step is only useful if you have multiple subscriptions)
Get-AzureRmSubscription –SubscriptionName "<SubscriptionName>" | Select-AzureRmSubscription
 
# Listing all slots for a app service
Get-AzureRmWebAppSlot -ResourceGroupName "<ResourceGroupName>" -Name "<AppServiceName>"
 
# Cloning web app to a new slot
$srcWebApp = Get-AzureRmWebApp -ResourceGroupName "<ResourceGroupName>" -Name "<AppServiceName>"
New-AzureRmWebAppSlot -ResourceGroupName "<ResourceGroupName>" -Name "<AppServiceName>" -AppServicePlan "<AppServicePlan>" -Slot "<NewSlotName>" -SourceWebApp $srcWebApp
 
# Cloning web app slot to a new slot
$srcWebAppSlot = Get-AzureRmWebAppSlot -ResourceGroupName "<ResourceGroupName>" -Name "<AppServiceName>" -Slot "<SourceSlotName>"
New-AzureRmWebAppSlot -ResourceGroupName "<ResourceGroupName>" -Name "<AppServiceName>" -AppServicePlan "<AppServicePlan>" -Slot "<NewSlotName>" -SourceWebApp $srcWebAppSlot
Happy Coding.

Regards,
Jaliya

Wednesday, November 1, 2017

ASP.NET Core 2.0: Why it’s important to have Program.BuildWebHost method?

I was doing some refactoring on an ASP.NET Core 2.0 Web Application which was migrated from ASP.NET Core 1.1.

In ASP.NET Core 1.1 Web Applications, program.cs was like this.
public class Program
{
    public static void Main(string[] args)
    {
        var host = new WebHostBuilder()
            .UseKestrel()
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseIISIntegration()
            .UseStartup&lt;Startup>()
            .UseApplicationInsights()
            .Build();
 
        host.Run();
    }
}
But with ASP.NET Core 2.0, it has to be something like this.
public class Program
{
    public static void Main(string[] args)
    {
        BuildWebHost(args).Run();
    }
 
    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup&lt;Startup>()
            .Build();
}
I felt like I can eliminate BuildWebHost method, so I did like follows.
public class Program
{
    public static void Main(string[] args)
    {
        WebHost.CreateDefaultBuilder(args)
            .UseStartup&lt;Startup>()
            .Build()
            .Run();
    }
}
All seem be good, the application was running well. After sometime, I wanted to add a database migration, and when I tried to do Add-Migration, I was getting this weird error.
Unable to create an object of type 'T'. Add an implementation of 'IDesignTimeDbContextFactory&lt;T>' to the project, or see https://go.microsoft.com/fwlink/?linkid=851728 for additional patterns supported at design time.
Apparently the error turned out to be program.cs not having BuildWebHost method.

In ASP.NET Core 1.x to ASP.NET Core 2.0 Migration Guide, it specifically says, “The adoption of this new 2.0 pattern is highly recommended and is required for product features like Entity Framework (EF) Core Migrations to work.”

Once I added it back, I was able to add database migrations back again.

Lesson learnt: When doing refactoring, somethings are better left alone!

Happy Coding.

Regards,
Jaliya