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.NET Core nginx, and Postgres with EF on an rPi

by Marc Clifton

Implementing an SSL capable server in .NET Core WITHOUT ASP.NET, using nginx, and testing Postgres with EF, all running on an rPi

Elasticsearch, Kibana and Docker using .NET Standard 2

by Juan G. Carmona

Advanced logging in modern .NET applications. A Sunday-morning-proof-of-concept.

Slack Chatting with your rPi

by Marc Clifton

Talk to your rPi over a Slack channel, getting status, controlling devices, and running shell (bash) commands and viewing the console output posted back to your Slack channel

ASP.NET Core Road to Microservices Part 02: View Components

by Marcelo Ricardo de Oliveira

The second of many articles featuring design patterns, architectural designs, frameworks and technologies leading to ASP.NET Core Microservices

Latest Articles

NFT Wallets Unleashed: A Data Structures and Application Design Journey

by optiklab1

Exploring world of NFTs and blockchain while prototyping wallet CLI application with efficient data structures using C# and .NET Core

From Linear to Upper Triangular Matrix Indices

by Maniezzo

A couple of lines of code to get the i-j indices of an upper triangular matrix (main diagonal included) from a linerized array.

Batch Processing with Directory.EnumerateFiles

by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

Inno Setup Dependency Installer

by DomGries

Download and install any dependency such as .NET, Visual C++ or SQL Server during your application's installation!

All Articles

.NET Core

NFT Wallets Unleashed: A Data Structures and Application Design Journey

29 Jan 2024 by optiklab1

Exploring world of NFTs and blockchain while prototyping wallet CLI application with efficient data structures using C# and .NET Core

From Linear to Upper Triangular Matrix Indices

20 Sep 2023 by Maniezzo

A couple of lines of code to get the i-j indices of an upper triangular matrix (main diagonal included) from a linerized array.

data-processing

Batch Processing with Directory.EnumerateFiles

12 Aug 2023 by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

Inno Setup Dependency Installer

7 Aug 2023 by DomGries

Download and install any dependency such as .NET, Visual C++ or SQL Server during your application's installation!

Connect to Azure Application Insights from .NET C# Web Application hosted in Localhost or Azure Web App

14 Jul 2023 by Sauradipta Chaudhury

Connect .NET Web App to Azure Application Insights hosted in Localhost or Azure Web App using the same code. The approach is recommended by Microsoft and is applicable for .NET 6 and above.

Castle Dynamic Proxy Interceptors to Track Model Changes and Trigger Rules

27 Jun 2023 by Ev Uklad

Add ability to track changes in a model class; use a proxy interceptor to execute a rule attached to a model property

CORS issue when angular and web API(.NET core) is used [SOLVED]

19 Apr 2023 by shivangkaul

I have two separate project, one is WebAPI developed in .net Core 2.2 with Windows Authentication and other is Angular. I am stuck in CORS issue. I was able to handle GET request by using withCredentials: true in GET method option as mentioned...

CORS issue when angular and web API(.NET core) is used [SOLVED]

19 Apr 2023 by Marcin Xyz

In ASP.Net Web API, .Net 7.0 + Angular I had exactly the same situation. GET requests worked, but on POST requests I was receiving error (visible in the console): Quote: Access to XMLHttpRequest at from origin has been blocked by CORS policy:...

TracerX Logger and Viewer for .NET

11 Apr 2023 by MarkLTX

Easy to use logger with a powerful viewer that supports filtering by thread, logger, etc.

The Missing Avalonia Templates for VB

26 Mar 2023 by Graeme_Grant

Add the missing project templates for the App and Control Library projects that were not included

A Simple Blazor Modal Dialog Implementation

25 Mar 2023 by Shaun C Curtis

How to build a Modal Dialog for Blazor

Distributed Locking with Redlock.net

19 Mar 2023 by Bohdan Stupak

How to perform distributed lock between multiple instances of a microservice with Redlock.Net

Implementing Text-to-Speech in C# using System.Speech.Synthesis

16 Mar 2023 by Ali Robot

How to implement a text-to-speech (TTS) application in C# using the System.Speech.Synthesis namespace

When run angular with webapi ASP.NET core project get error

12 Feb 2023 by ahmed_sa

I have application work in asp.net core 2.1 visual studio 2017 work with angular but when run page it show empty page i make inspect inside web page i get error as below Uncaught Error: inject() must be called from an injection context at injectInjectorOnly (core.js:1188) at inject...

When run angular with webapi ASP.NET core project get error

12 Feb 2023 by developer_1605

Try changing the private modifier data to public to make the data accessible in the template. and Make sure to import Inject from @angular/core, and add @Inject decorator in the constructor (note the capital "I").

Writing Custom Control with New WPF XAML Designer

9 Feb 2023 by Stanko Milošev

How to either migrate to the new XAML designer extensibility or write WPF custom control extensibility model based on .designtools.dll.

How to Achieve Progressive Disclosure UI for Non-JS Users

6 Feb 2023 by mural3

Progressive disclosure UI on JS disabled browsers

How to upload file with data from angular 8 to ASP.NET core 3 web api

6 Feb 2023 by Ajas Aju

I have the same issue not resolved yet. My API Code: HttpPut("updateThemeDetail/{whiteLabelId}")] public async Task UpdateThemeDetail([FromForm]TenantThemeSetUpInput item, string whiteLabelId) ...

How to upload file with data from angular 8 to ASP.NET core 3 web api

6 Feb 2023 by JayantaChatterjee

Hi All, I created a .net core(v3) Web API and an Angular project, so I trying to send an object which will contain a file and others data (like name, duration etc..). My Angular component code:- saveMovie() { this.submitted = true; if...

Pythonnet – A Simple Union of .NET Core and Python You’ll Love

25 Jan 2023 by Dev Leader

Use the "Python for .NET" package as a way to call Python from C# code

Get error 401 authorization with swagger but works properly in postman (dot net core)

7 Dec 2022 by SajjadZare

I add swagger to my project and use authorization. It works properly with Postman but when want to use with Swagger get 401 Undocumented What I have tried: public void ConfigureServices(IServiceCollection services) { ... ...

Get error 401 authorization with swagger but works properly in postman (dot net core)

7 Dec 2022 by toumir

have the same problem resolved : just add bearer word before jwt : brearer thaus all :)

Dockerize ASP.NET Boilerplate Projects

23 Nov 2022 by alirıza adıyahşi

Creating a web farm on Docker container using redis, haproxy and abp module zero core template

Deserializing Json Streams using Newtonsoft.Json & System.Text.Json with C# & VB

16 Nov 2022 by Graeme_Grant

How to deserialize very large simple & complex JSON Streams (.NET 6.0 & 7.0)

Working with System.Text.Json in C#

31 Oct 2022 by Graeme_Grant

Working with simple JSON objects and collections to Custom Converters and Transformations into .NET classes - System.Text.Json

Sqlite in memory database doesn't have EXIST IF

12 Sep 2022 by Member 12885549

I had sql query: IF EXISTS(SELECT 1 FROM Amount WHERE ID = 1 AND ClientId IS NULL) BEGIN UPDATE Amount SET Price = 11 WHERE ID = 1 AND ClientId IS NULL PRINT 'Updated' END ELSE BEGIN INSERT INTO Amount (ID,...

Sqlite in memory database doesn't have EXIST IF

12 Sep 2022 by CHill60

SQLite allows for "UPSERT" - which is what you are trying to do. See SQLite Query Language: upsert[^] You will need to ensure that you are enforcing uniqueness - e.g. on the ID

Sqlite in memory database doesn't have EXIST IF

12 Sep 2022 by Richard MacCutchan

See Query Language Understood by SQLite[^]

Sqlite in memory database doesn't have EXIST IF

12 Sep 2022 by Dave Kreskowiak

From the MySQL documentation[^] for IF says you cannot use an IF outside of a FUNCTION.

JLogger6 - When You Care to Write the Very Best

21 Aug 2022 by MSBassSinger

Description of a simple, versatile, and scalable logger

How to add functionality to buttons( next previous first last) navigation buttons to primary key field using MVC

31 Jul 2022 by ahmed_sa

==========Problem========== Cannot add functions to Next previous last first for create action using repository pattern based on EmployeeId field ==========Example========== Employee Id : 5 as last record IF create action view get loaded it must show max+1 for Employee Id meaning it will...

entity-framework

VoiceNET Library

27 Jun 2022 by Nguyễn Trung Nhẫn

Free Voice Command Control Library

Please help to solve equation in C#

16 May 2022 by Member 15637522

Create a single-dimensional array X with integers in the range [600;700]. The number of array elements is determined by the user. Calculate and save the value in Y array according to the formula y=√((x+4)/(x-sin(5x))+) ∛(x+4) . Display two arrays...

Please help to solve equation in C#

15 May 2022 by CPallini

The first requirement is to create and populate an array with N (provided by the user) values in the [600..700] range. You may choose how to populate such an array. One alternative is constantly increasing values, e.g. const double...

Please help to solve equation in C#

15 May 2022 by Richard MacCutchan

The formula is as specified in the question. The Math Class (System) | Microsoft Docs[^] contains methods for square and cube roots and sin, so the calculations should be fairly easy to do. The number of elements is, as specified, selected by...

Please help to solve equation in C#

15 May 2022 by Patrice T

Quote: Please help to solve equation in C# We help you fix your code, we don't do your homework for you. Quote: i tried but cant understand algorithm This is not an algorithm, this is requirement. As programmer, your job is to create the...

CrossCutterN: A Light Weight AOP Tool for .NET

31 Mar 2022 by David_Cui

A brief introduction to CrossCutterN tool remade for AOP programming in .NET technologies

Cinchoo ETL - Split a Large JSON File Based on Deeply Nested Array Property

12 Jan 2022 by Cinchoo

Tip to split large JSON file based on deeply nested array property using Cinchoo ETL

Create .NET MVC Web Application Using Visual Studio on Mac OS [Part 1]

29 Nov 2021 by Uladzislau Baryshchyk

This series of articles consists of three articles, in which I will demonstrate step by step how to create a .NET core MVC project

entity-framework

Using Span<T> to Improve Performance of C# Code

27 Nov 2021 by Bohdan Stupak

Overview of Span C# feature and an example of how it can improve the existing codebase

Multiple Models In a MVC View

5 Nov 2021 by #realJSOP

One way to allow access to multiple model entities within a ASP.NET MVC view.

Cinchoo ETL - Converting JSON to XML with Namespaces

27 Oct 2021 by Cinchoo

Tip to convert JSON to XML with namespaces using Cinchoo ETL

Cinchoo ETL - Quick Start: Converting CSV to JSON File

20 Oct 2021 by Cinchoo

Quick tutorial on converting CSV file to JSON file using Cinchoo ETL

Get error 401 authorization with swagger but works properly in postman (dot net core)

15 Sep 2021 by Member 13251389

If you are adding token in "Available authorizations" Pop up/Model. Please make sure you have added a word "Bearer" with space followed by token. This was my issue.

QuickStart Tor in .NET Core

21 Aug 2021 by Ádám Ficsór

How to use Tor in .NET Core

User buy product with group order (many users) in E-commerce website

15 Aug 2021 by OriginalGriff

While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for...

UkrGuru.SqlJson Your Link Between SQL Server and .NET 5

24 Jun 2021 by Oleksandr Viktor (UkrGuru)

Minimally simple UkrGuru.SqlJson package for modern data manipulation

SQL-Server-2016

.net core - understanding websockets on a microservice used by many

24 May 2021 by TheBigBearNow

Hello all, When my site is deployed and multiple people as using it I am trying to understand if my server were able to handle these requests from multiple people. At first itll only be 10-20 people but I plan on it growing. On the UI since its...

.net core - understanding websockets on a microservice used by many

24 May 2021 by Chris Copeland

Asynchronous Server Socket Example | Microsoft Docs[^] The above might help you out, it depends on how you've implemented your accept/receive endpoints. In theory your socket should be handling connections and reception of buffers on a separate...

Excelsior! Building Applications Without a Safety Net - Part 3

20 May 2021 by Pete O'Hanlon

Third part of a series of articles where we build an application showing the entire thought process when writing it

Excelsior! Building Applications Without a Safety Net - Part 2

13 May 2021 by Pete O'Hanlon

Second part of a series of articles where we build an application showing the entire thought process when writing it

Excelsior! Building Applications Without a Safety Net - Part 0

11 May 2021 by Pete O'Hanlon

Introduction to a series of articles where we build an application showing the entire thought process when writing it

Excelsior! Building Applications Without a Safety Net - Part 1

11 May 2021 by Pete O'Hanlon

First part of a series of articles where we build an application showing the entire thought process when writing it

What Code Editor to Use for .NET Core on MacOS?

10 May 2021 by Jason Sultana

A short discussion of some different options available for developing .net core applications on Mac OS

Building and Deploying (CI/CD) Angular Applications using GitHub and Azure

8 May 2021 by DotNetLead.com

How to build and deploy Angular application using GitHub and Azure

Running my UI app (WPF app) inside worker service with C# .NET core

6 May 2021 by Ay2S

Hi OriginalGriff, Thanks, I can see more clearly. Effectively, your proposal fits well with a suggestion which I found in a discussion here[^], about the architecture of the project must be: Quote: If you want it in the system tray I think what...

Windows-service

Running my UI app (WPF app) inside worker service with C# .NET core

6 May 2021 by Ay2S

Hi everyone, I have a WPF app which is accessible in a system tray icon and I want to run it a windows service. Typically, If I take an exemple from a popular Apps I would choose Microsoft Teams which starts in a system tray icon at startup...

Windows-service

Running my UI app (WPF app) inside worker service with C# .NET core

6 May 2021 by OriginalGriff

You cannot run a UI app as a service at all: a service cannot interact with the user in any way, form, or manner - as services can (and do) run before any user is logged in - and until a user is logged in, there is no user to interact with, or...

Windows-service

A Few Missing Methods on BinaryReader

23 Apr 2021 by honey the codewitch

BinaryReader needs a better way to read strings and types. Here's a quick and dirty fix

Winforms-datavisualization .NET 5

22 Apr 2021 by Angelo Cresta

.NET 5 version of dotnet/winforms-datavisualization

data-visualization

Use Bootstrap Toggle Button Group in Blazor

15 Apr 2021 by Daniel H. W.

Toggle Buttons to select different options without JavaScript

Building a Database Application in Blazor - Part 1 - Project Structure and Framework

7 Apr 2021 by Shaun C Curtis

How to structure and build a Blazor Database Application

Building a Database Application in Blazor - Part 2 - Services - Building the CRUD Data Layers

7 Apr 2021 by Shaun C Curtis

How to build the CRUD Data Layers in a Blazor Database Application

Building a Database Application in Blazor - Part 3 - CRUD Edit and View Operations in the UI

7 Apr 2021 by Shaun C Curtis

How to build the CRUD Viewer and Editor Presentation/UI Layer in a Blazor Database Application

Building a Database Application in Blazor - Part 4 - UI Controls

7 Apr 2021 by Shaun C Curtis

How to build the UI Controls in a Blazor Database Application

Building a Database Application in Blazor - Part 5 - View Components - CRUD List Operations in the UI

7 Apr 2021 by Shaun C Curtis

How to build the CRUD List Presentation/UI Layer in a Blazor Database Application

How to use bower in ASP.NET core

24 Mar 2021 by rtksmithjoton123

How can I use bower in my project correctly? What I have tried: I refer to this Manage Client-Side Packages with Bower — ASP.NET documentation[^] , but I can not realize the steps. Can anyone give some detail steps.

How to use bower in ASP.NET core

24 Mar 2021 by Richard Deeming

OK, it seems you're looking at some out-of-date documentation. Bower is dead[^]. Bower replacement in Visual Studio 2017 ASP.NET MVC Core Template - Stack Overflow[^] Use NPM, Yarn, or the built-in client-side library manager instead.

Asp .NET MVC button is not triggering action in controller

23 Mar 2021 by lord giv

Hi guys. I'm fighting with my code for some time.. I'm trying to open another view using simple button id of button is - openbagpromotion and action of controller is OpenBagPromotion What I saw is that after clicking a button, there is no...

How WireMock.NET Can Help in Doing Integration Testing of a .NET Core Application

19 Mar 2021 by Daan Acohen

Learn how to do integration testing while mocking external dependencies of your .NET Core application

test-automation

Error cannot apply operator '<' to operands of type 'models.semester' and 'system.datetime', candidates are: bool <(system.datetime, system.datetime) (in struct datetime)

15 Mar 2021 by huynbt209

I am having a Semester1 including StartDate1 and EndDate1. I want to create a new Semester2 and it must ensure EndDate1

Error cannot apply operator '<' to operands of type 'models.semester' and 'system.datetime', candidates are: bool <(system.datetime, system.datetime) (in struct datetime)

15 Mar 2021 by Richard Deeming

Quote: _dbContext.Semesters.Find(semesterViewModel.Semester.SemesterEndDate)

Error cannot apply operator '<' to operands of type 'models.semester' and 'system.datetime', candidates are: bool <(system.datetime, system.datetime) (in struct datetime)

14 Mar 2021 by OriginalGriff

What you are comparing isn't a pair of DateTime objects - it's (probably, we can;t see your code from here) a DateTime on the right hand side of the comparison, but the left hand side will be a collection of Semester objects. Try it: split your...

How Does the Application settings in Core 3.1 Work in a Multi-environment Scenario

14 Mar 2021 by freedeveloper

Managing multiple environments is a very common situation in software development in the enterprise

What is environment in spring boot

8 Mar 2021 by rtksmithjoton123

I want to know the spring boot Environment function, and what is the difference between it and asp.net core IWebHostEnvironment. What I have tried: I find the spring boot explanation, but I want to know it more detail.

What is environment in spring boot

8 Mar 2021 by Richard MacCutchan

See Environment (Spring Framework 5.3.4 API)[^]

Customize the error response body

3 Mar 2021 by rtksmithjoton123

When upload a large file, the iis will occur to a http 413 error. And the response body is html. But I want to customize the response body. How can I do it? What I have tried: I find some blogs and other way to excute it. But no this configuration.

Fluent-Endurance: Fluent Endurance Automation Framework to Fluently Create Endurance Tests

2 Mar 2021 by Gerard Castelló Viader

This project is about a fluent endurance automation framework whose API helps you to fluently create your endurance tests defining repetitions and timeouts.

test-automation

How to use Google sheet

1 Mar 2021 by rtksmithjoton123

Through some searching, there is no detail turiols about google sheet. How can I get them? What I have tried: I want to use it to integrete some tables.

How to use Google sheet

1 Mar 2021 by OriginalGriff

"No tutorials"? That's strange: Google Sheet c#[^] gave me loads of links, most of them to the Google documentation ...

Async with foreach causing mixup and missing of data

28 Feb 2021 by VICK

we have a public async method with the following code in it int page = 1; int size = 50; var activeDocuments = await GetDocuments(page, size); while...

Can I use remarks on a property in swagger

28 Feb 2021 by rtksmithjoton123

I want to add the on a property in a model. public class MyModel { /// summary /// /// example: ... /// public int id { get; set; } } The...

How would I implement fluentassertions

28 Feb 2021 by Zach H.

I just recently created a project that'll calculate the Fibonacci series, standard deviation, and the Pythagorean theorem. How would I go about adding Unit Tests and using FluentAssertions to test the methods. Would I have to install XUnit first,...

How would I implement fluentassertions

28 Feb 2021 by RickZeeland

They claim the following here: Introduction - Fluent Assertions[^] Quote: Fluent Assertions supports a lot of different unit testing frameworks. Just add a reference to the corresponding test framework assembly to the unit test project. Fluent...

Cast long[] to object[]

27 Feb 2021 by csrss

Simple stuff, it seems like not possibile to cast long[] to object[]. Anyone knows why so? What I have tried: var array = (object[])Array.CreateInstance(typeof(long), 1); System.InvalidCastException: Unable to cast object of type...

Cast long[] to object[]

27 Feb 2021 by OriginalGriff

You can't cast an array of values to any other array type because value types are "special": they aren't all the same size, and value types can't be inherited anyway. With reference types, the variable is always the same size: 8 bytes on a 64...

Dependency Injection using Simple Real Time Application in C# (Part I)

27 Feb 2021 by GuruGanesan

A simple article to understand the concept of dependency injection using C#

Callback web api in .NET core

26 Feb 2021 by Kumar Veerabadran

Hi, How to create a callback listener web api using .net core. What I have tried: --------------------------------------------------------------------------------------------

Callback web api in .NET core

26 Feb 2021 by Dave Kreskowiak

WebAPI's don't do callbacks. They typically run over HTTP, which is a request/response system. Your code makes a request to a URL and the server does something and returns a reply. It's an "I'll call you" kind of thing, not the "server calls...

Async with foreach causing mixup and missing of data

26 Feb 2021 by Richard Deeming

Difficult to answer, since we can't see what the GetDocuments or UpdateFeedAsync methods are doing. But at a guess, you're changing something on the document which causes it to move to a different "page" of data, so the next call to GetDocuments...

How to subscribe EWS push notification and receive response

25 Feb 2021 by Kumar Veerabadran

Hi all, I am working on reading mail from outlook by EWS push notification subscription. I have done subscription with SubscribeToPushNotifications(IEnumerable, Uri, Int32, String, EventType[]) also received the subscription id...

Blazor Hydra - Hosting Multiple Blazor SPAs on a single Site

25 Feb 2021 by Shaun C Curtis

How to combine Razor, Blazor WASM and Server SPAs under the same roof

.net core docker webapi remotecertificatechainerror

24 Feb 2021 by TheBigBearNow

Hello all, I have 2 .net core projects that work perfectly with each other when I run them normal, I have an API and a MVC UI. When I run them in docker containers, I go on my API with swagger, I figured out how to connect my postgres db and...

Converting Video with FFmpegCore

23 Feb 2021 by Bohdan Stupak

A simple snippet of how you can convert video in .NET Core

Work with resource files by resourcemanager in .NET core 5 MVC

19 Feb 2021 by Member 11216770

Hi there, I wanna work with resource file by this code in .net Core 5 MVC: rm = new ResourceManager("Resources.Texts", System.Reflection.Assembly.Load("Resources")); ci = Thread.CurrentThread.CurrentCulture; rm.GetString(name, ci); My...

Cake Frosting: More Maintainable C# DevOps

18 Feb 2021 by Lee P Richardson

Cake V1.0 is a more robust technique for writing DevOps in a language the whole team can understand.

Auto-generated columns in a WPF ListView

18 Feb 2021 by #realJSOP

A WPF ListView that automatically generates columns (that are also sortable) based on decorated entity properties

How to set the port when using metrics

17 Feb 2021 by RickZeeland

I think you can use: Quote: var metricServer = new MetricServer(port: 1234); metricServer.Start(); Taken from: GitHub - prometheus-net/prometheus-net: .NET library to instrument your code with Prometheus metrics[^] Also see: Hooking up Prometheus...

How to set the port when using metrics

17 Feb 2021 by rtksmithjoton123

I set the app.UseHttpMetrics(); to monitor, but I want to set the metrics to work on an another port when api work on 5000. What I have tried: I search some blogs and docuement, but I can not find some relative article about how to change it....