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Programming

About Microsoft.NET, C#/VB/C++, WPF/WCF/WinForm/Silverlight, Windows Azure, SQL Server, Windows Phone, etc.

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lite-log powershell

Calculate Time Difference between Dates in PowerShell

1501 views   0 comments last modified about 12 months ago

PowerShell provides a number of cmdlets to retrieve current date time and to create time span object. Calculate time difference - CmdLets $current = Get-Date $end= Get-Date $diff= New-TimeSpan -Start $current -End $end Write-Output "Time difference is: $di...

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dotnet core angular asp.net core 2

Issue - Unable to get property 'apply' of undefined or null reference occurred in Angular 4.*, VS2017 15.3, ASP.NET Core 2.0

7702 views   10 comments last modified about 2 years ago

Issue Context After installed Visual Studio 2017 15.3 preview and .net core 2.0 preview SDK, I upgraded one of my existing asp.net core project to 2.0. The project was created using ‘dotnet new angular’ SPA template.  I also upgraded all the client app packages to the latest. For exa...

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c#

Tuples in C# (4.x, 7.0, 7.1)

274 views   0 comments last modified about 2 years ago

What is a tuple? Tuple is an ordered sequence, fixed-size, immutable and of heterogeneous objects. Tuple has been existing in other languages such as F#, Python, Perl and etc. for a long time. It was first introduced into C# from C# 4.0 and has been evolving over time. Since C# 7.1, tuple...

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c# lite-log

C# version history and core features

202 views   0 comments last modified about 2 years ago

C# is my favourite programming language and has been evolving overtime. I have been programming with many other languages but C# is always my favourite because it is simple and easy to use. Visual Studio is the most powerful tool I’ve ever used. To me, programming efficiency and peformance are th...

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lite-log hadoop hdfs

Invoke Hadoop WebHDFS APIs in .NET Core

676 views   0 comments last modified about 2 years ago

Background Apache doesn't provide native official .NET APIs for Hadoop HDFS. The HTTP REST API supports the complete FileSystem / ...

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.net core

Logging configuration in .NET core

2289 views   0 comments last modified about 2 years ago

.NET core introduces a logging API that works with a number of logging frameworks. The built-in providers are configurable and extensible to support different level loggings.

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.net core

Sending Emails in .NET Core Applications

1975 views   0 comments last modified about 2 years ago

Sending emails are common in applications. For example, when user registers, we need to send account activation emails. This post summarize the approaches we can use to send emails in .NET Core 1.x and 2.x.

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dotnet core asp.net core

Retrieve Http client request metadata like IP address and languages in asp.net core

2383 views   0 comments last modified about 2 years ago

IP Address In ASP.NET Core, Request.UserHostAddress has been removed though that attribute exists in the traditional ASP.NET applications. We can use HttpContext.Connection to retrieve the remove client IP address: var ipAddress = HttpContext.Connecti...

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asp.net core identity core 2

Retrieve Identity username, email and other information in ASP.NET Core

6415 views   0 comments last modified about 2 years ago

The identity system in ASP.NET has evolved over time. If you are using ASP.NET Core, you probably found User property is an instance of ClaimsPrincipal in Controller or Razor views. Thus to retrieve the information, you need to utilize the claims.

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.net core azure

Retrieve Azure AppSettings and Connection String Settings in ASP.NET Core Apps

3620 views   0 comments last modified about 2 years ago

In ASP.NET Core, we can easily use user secrets to manage our password or credentials. This post will summarize the approaches we can use after the websites are deployed into Azure.

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