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Introduction

This post describes how to use LEADTOOLS (Windows or Linux) in .NET Core to convert almost any image to a PNG. This service can be used to display non-standard files in any modern web browser without installing plug-ins or third party code on the client.

Background

If you follow this tutorial, the resulting project demonstrates a quick and easy way to use 3rd party C API in .NET Core using DLLImport. Specifically, this project uses LEADTOOLS DLL/SO C API in .NET Core to convert files to PNG. Native .NET Core support is not available now available in LEADTOOLS version 20. An updated blog post that uses NuGet packages has been published for version 20.

As part of the LEAD Technologies 25th anniversary, we are creating 25 projects in 25 days to celebrate LEAD's depth of features and ease of use. Today's project comes from Hadi.

If you've been keeping track, this is actually our 25th project and the last one in our #LEAD25 series. But don't be sad, we post examples like these to our blog and forums on a regular basis so keep in touch! If you missed any of them, take a look back at our series introduction where we've kept a running list as each project was posted.

As part of the LEAD Technologies 25th anniversary, we are creating 25 projects in 25 days to celebrate LEAD's depth of features and ease of use. Today's project comes from Justin.

What it Does

This ASP.NET C# application will display a thumbnail image gallery using LEADTOOLS Version 19.

HTML5 is certainly the way of the future, but as many web developers know, adoption can be slow. In many cases, older browsers such as IE8 is still in use enterprise-wide and a lightweight, feature packed solution is still required. LEADTOOLS pioneered lightweight ASP.NET Web Forms imaging years ago and is still a popular choice. Though not as flashy and responsive as HTML5, the heavy-lifting jobs such as Optical Character Recognition (OCR) are still done on the server side.

In the following example, you'll see how to add OCR functionality and image display into your ASP.NET Web Forms application.