linq-first

C# – Serialize and deserialize a multidimensional array to JSON

by

System.Text.Json doesn’t support serializing / deserializing multidimensional arrays. When you try, it throws an exception like this – System.NotSupportedException: The type ‘System.Int[,] is not supported. You have three options: In this article, I’ll show an example of how to create a custom JsonConverter that handles multidimensional arrays. In this example, I’ll specifically show how to … Read more

C# – Search for files in a directory

by

Use Directory.EnumerateFiles() to search for files in a directory and then loop over the file paths (and then reading the files, or whatever you want to do with the info). Here’s an example of searching for files containing “hello” in the file name: Note: Use the wildcard character * to match anything. It returns an … Read more

ASP.NET Core – Receive a request with CSV data

by

There are two ways to receive CSV data in a web API: In this article, I’ll show examples of both of these approaches. I’ll be using the CsvHelper library to parse CSV data into model objects and then do model validation. Note: To use CsvHelper, install the CsvHelper package (Install-Package CsvHelper). Or use whichever parser … Read more