Step by step migration of ASP.NET Core 2.2 to 3.1

In order to upgrade/migrate asp.net core version to 3.1 following steps to be perform.
Download and install Visual Studio 2019 version 16.4 or higher.Download and install .NET Core 3.1  https://dotnet.microsoft.com/download/dotnet-core/3.1Upgrade the projects of solution to .NET Core 3.1 , because ASP.NET Core 3.1 requires it.Update existing Nuget packages to a version compatible with ASP.NET Core 3.1 in each projectUse IHost interface from a IHostBuilder instead of building and running a IWebHost from a IWebHostBuilder in Program.cs public static IHostBuilder CreateWebHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseKestrel() .UseSerilog() .UseStartup<Startup>(); }) Change AddMvc method has been replaced by AddControllers in Startup.cs of each projects.In Startup.cs,UseMvc method to be replaced by…

Adding events to DOM Elements in javascript by For IE, Mozilla, Opera browsers

To add events to DOM element Dynamically using javascript needs to write dis=fferent code for different browsers. Browsers Like Mozilla, Opera support the "W3C DOM Level 2 event binding mechanism"  which uses a function on DOM elements called addEventListener.


 Following the way to  add events to DOM element Dynamically for all browser.


if (window.addEventListener != null)
{ // Method for browsers that support addEventListener, e.g. Firefox, Opera, Safari
window.addEventListener("focus", FocusFunction, true);
window.addEventListener("blur", FocusLostFunction, true);
}
else
{ // e.g. Internet Explorer (also would work on Opera)
window.attachEvent("onfocus", FocusFunction);
document.attachEvent("onfocusout", FocusLostFunction); //focusout only works on document in IE
}  


Hope this will help you guys........

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