Book Review – Pro ASP.NET Core MVC 2
Adam Freeman has written the 7th edition of the Pro ASP.NET Core MVC 2 book. And there should really be a reason to issue the book so many times! The book itself gives my favourite way of presenting software – …
Author: Vitosh
C# – Handle concurrency – ASP.NET MVC with EF Core
After updating the related data in the ASP.NET tutorial, it is time for the next step – handling concurrency in the MVC Application. These are the points, followed by the video: Learn about concurrency conflicts Add a tracking property Create …
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C# – Update related data – ASP.NET MVC with EF Core
After reading complex the data, it is time to be able to update it. This video fills the following points from the ASP.NET MVC tutorial: Customize Courses pages Add Instructors Edit page Add courses to Edit page Update Delete page …
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C# – Read related data – ASP.NET MVC with EF Core – Video
After creating a complex data model, now it is time to display the data, following the tutorial. The task is actually a challenging one, as far as the data display is in a way partial – in the “Instructors” view, …
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C# – Create a complex data model – ASP.NET MVC with EF Core – Video
Creating a complex data model with the previous data model in ASP.NET is actually a challenging task. The model in general looks like this: It is not “extremely” complex, but it is something bigger than the previous 3 tables that …
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C# – Using Migrations – ASP.NET MVC with EF Core – Video
Migrations in C# are quite well facilitated by the EntityFramework. In general, when an application with databse is created, initially the database model is taken from the model classes. When these models classes change, then they get out of sync …
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C# – Add sorting, filtering, and paging – ASP.NET MVC – Video
Sorting, filtering, paging and summary of an app are quite important features. In this video, which is a continuation of the Microsoft tutorial, I present step-by-step how to do each one of these. It is quite a large video, but …
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C# – Implement CRUD Functionality – ASP.NET MVC with EF Core – Video
This is the second video of the Microsoft tutorials, for ASP.NET MVC with Entity Framework Core: Continuing the previous video, in this one the following tasks are carried out: Customize the Details page Update the Create page Update the Edit …
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C# – Get started with EF Core in an ASP.NET MVC Web App – Video
Lately, I have started with creating video tutorials for ASP.NET. Thus, today it is time to deep dive in the ASP.NET once again, following the Microsoft tutorial for ASP.NET MVC Web App from here. In the video below, the following …
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C# – Create a web app with ASP.NET Core MVC – Video
Creating a web application with ASP.NET could look as a hard task. Still, with the pre-built MVC models from Visual Studio, the task is a bit easier. This is how the application looks like, with 2 search buttons and fully …
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C# – Create a web API with ASP.NET Core – Video
Web API with Visual Studio 2019 is quite a bolierplate task – it is doable in less than 45 minutes, following the Microsoft.com tutorial: The video tutorial is here: The TodoController , implementing the CRUD actions looks like this: using System.Collections.Generic; …
C# – ASP.NET Core MVC Application with Basic Database Access using Entity Framework – Video
The title somehow looks like random words, picked from a hat at one of those college games we are not supposed to talk about. Anyway, at the second reading it hopefully becomes a bit clearer. And it is simply the …
VBA – Longest Palindromic Subsequence Algorithm with Excel – GIF
After writing about the longest palindromic substring, now it is time to see the longest palindromic subsequence. What is the difference? Pretty much, if we take the word abracadabra: the longest substring is ada in abracadabra the longest subsequence is …
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ASP – Data Entry MVC Application with Database – Video
After the first video for MVC here, I have decided to make a next part, in which I save the entries to a database and display them: Sounds like a tiny update. However, it …
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VBA – Longest Palindromic Substring Algorithm with Excel – GIF
The longest palindromic substring algorithm exists since 1975. It is different (and easier) than the longest palindromic subsequence. The idea of the substring is to return “anana”, if “bananazorro” is given. This is achieved with a 2 dimensional boolean array matrix and …
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C# – xUnit Test Implementation in Fibonacci Calculation – Video
Good software comes with tests. Fortunately, Visual Studio 2019 provides quite nice ways to test the software you are creating. One of these is xUnit – xunit.net. Thus, I have decided to make a video, showing how to implement xUnit …
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ASP – Data Entry MVC Application – Video
I have started reading the 2nd edition of the Pro ASP.NET Core MVC book and after reading the first couple of chapters, I have decided to make a video of the application in the second chapter. The code is about …
VBA – Insert an image/picture in Excel and position it correctly
Inserting an image to Excel with VBA is actually one line: ThisWorkbook.Worksheets(1).Pictures.Insert (“C:\Users\myPic.png”) The interesting part happens, when it should be correctly positioned. In order to position it the way we want, we need to give 3 parameters – the …
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VBA – Put a Collection inside a Scripting Dicitonary OR Make an Updateable ComboBox
The idea of the article is to make an updateable combobox, which takes all the keys of column A and writes them to the ComboBox. Then, upon selection of the corresponding values in the combobox, it provides the corresponding values …
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VBA – ListBox in Excel – Adding, Editing and Removing Data
The idea of the article is to show how to add, edit and remove specific entries of the ListBox in Excel through VBA: ListBox is a control, which is available through Developer>Insert>ActiveX>ListBox in Excel: Once you add it, it has …
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VBA – Reverse words in a sentence
Reversing words in a sentence with VBA in Excel is quite easy, using the built-in StrReverse function. StrReverse takes a string and reverses it. Thus, “VitoshAcademy.com” becomes “moc.ymedacAhsotiV”: The idea of reversing the order of the words in a sentence …
VBA – Cells and Ranges in Excel (A bit more than the standard story)
Excel’s ranges and cells are both complicated and very simple. They are simple, because everyone has an idea what is a range and what is a cell, and they are complicated, because these are both: Properties of the worksheet object …
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VBA – Benford Analysis (First-Digit Law)
Long time ago, an astronomer called Benford was taking a look at logarithm books, noticing that the earlier pages (starting with 1) are pretty much more worn out than the later ones. He thought about the result, and managed to …
VBA – Dictionary
VBA has a dictionary structure. Dictionary is an object, and it can be referenced either with early binding or with a late binding, referring to Microsoft Scripting Runtime: What is a dictionary? This is the Microsoft definition of the VBA …
Python – Stand Alone Application with GUI
Python has a built-in GUI package, which allows easy building of forms like this: The package used in this example is tkinter. The form above takes the value, entered in the entry field, squares it and displays it back in …
C# – CodeForces – From Hero to Zero
It was some time ago, since I last took a look at programming challange in CodeForces, thus I have decided to take a look again. So, I chose the lowest problem of the second division just to boost up my …
C# – Look at the Variables’ Values, while Debugging in Visual Studio
Debugging is like being the detective in a crime movie where you are also the murderer. In order to debug well, we need to know the value of the current variable. In Visual Studio, this could be acquired through multiple ways. …
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Top VBA-Excel errors
Some months ago #VBA was finally considered the most dreaded language in the 2019 StackOverflow survey: One of the reasons for this, is probably that #VBA is quite too easy to enter, thus plenty of non-IT professionals feel fascinated about …
VBA – Abstract classes. Classes, that cannot be instantiated.
There are parts of #VBA, that can scare any VBA developer, who has not bumped into other languages. Although, the “abstract class” term is quite popular in C# and other languages, and is quite easy to be created, in VBA, …
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C# – Reading from Excel Spreadsheets with Asynchronous Programming (Async)
Reading from Excel in C# is actally not at tough as many VBA developers would assume. The simple reading is actually quite straightforward – there is only small little trick, requiring the adding of the Microsoft.Office.Interop.Excel reference to the Visual …
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