HOW TO: Handle Base64 encoded files using the LEADTOOLS SDK

#1 Posted : Wednesday, July 24, 2019 8:21:03 AM(UTC)

Hadi

Groups: Manager, Tech Support, Administrators
Posts: 218

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In computer science Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. The term Base64 originates from a specific MIME content transfer encoding. Each Base64 digit represents exactly 6 bits of data. Three 8-bit bytes (i.e., a total of 24 bits) can therefore be represented by four 6-bit Base64 digits.

Common to all binary-to-text encoding schemes, Base64 is designed to carry data stored in binary formats across channels that only reliably support text content. Base64 is particularly prevalent on the World Wide Web where its uses include the ability to embed image files or other binary assets inside textual assets such as HTML and CSS files.

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs be stored and transferred over media that are designed to deal with textual data. This is to ensure that the data remains intact without modification during transport.

If your application has a requirement to load and display Base64 strings, you can use the following methods to load and Display them in the ImageViewer or DocumentViewer:

Code:

      static LEADDocument LEADDocumentFrom64(string b64Str)
      {
         byte[] bytes = Convert.FromBase64String(b64Str);
         using (MemoryStream ms = new MemoryStream(bytes))
         {
            return DocumentFactory.LoadFromStream(ms, new LoadDocumentOptions());
         }
      }

Code:

      static RasterImage RasterImageFrom64(string b64Str)
      {
         byte[] bytes = Convert.FromBase64String(b64Str);
         using (RasterCodecs rc = new RasterCodecs())
         using (MemoryStream ms = new MemoryStream(bytes))
         {
            return rc.Load(ms);
         }
      }

Hadi Chami
Developer Support Manager
LEAD Technologies, Inc.


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HOW TO: Handle Base64 encoded files using the LEADTOOLS SDK