I recently had the need to convert simple strings back and forth from Base64 encoding. It turned out to be relatively simple in .Net, once you figured out which class libraries you needed to combine. It turns out the System.Convert has two handy methods for dealing with Base64, ToBase64String and FromBase64String.
base64(decodeDataUri(triggerBody()['convertpicture_Inputs'])) and in your Canvas app, call the Flow and pass the content as a url encoded parameter - here is an example of taking a photo from a collection and passing it into a Flow: 'PowerApp->Createanewrecord'.Run(First(photo).Url , BrowseGallery1.Selected.Case) boost/beast/core/detail/base64.hpp - 1.66.0 boost/beast/core/detail/base64.hpp // // Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com) // // Distributed under the Boost Software License Base64 encoding – Vorbrodt's C++ Blog
Base64 encode data - Rosetta Code
Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. Parameters specify the subset as an offset in the input array, the number of elements in the array to convert, and whether to insert line breaks in the return value.
Base64 encode/decode. Contribute to littlstar/b64.c development by creating an account on GitHub.
Encode an ASCII string into Base-64 Format - GeeksforGeeks