Web base64 encoding12/29/2023 ![]() In addition, we’ve shown how to encode a string to Base64 and vice-versa. In this article, we’ve learned how to Base64 encode and decode in C#. ![]() Var base64EncodedBytes = Convert.FromBase64String(base64String) We are going to use the output from ToBase64String() conversion for “world!”, the base64String variable: // before: d29ybGQh It converts from Base64 to its equivalent 8-bit unsigned integer array. Each 6 bits of the bit stream are encoded to base64 digit. This method is the opposite of the ToBase64String() method. The text input is first encoded as binary bit stream of ASCII codes of each character. Decode the Base64 String in C# With FromBase64String() We can see that the value has been broken into two lines. after: VGhlIGdyZWF0IGNyb2NvZGlsZSBvZiBRdWVlbnNsYW5kIGNhbiBhdHRhaW4gYSBsZW5ndGggb2Yg The term Base64 originates from a specific MIME content transfer encoding. Var base64String = Convert.ToBase64String(textBytes, Base64FormattingOptions.InsertLineBreaks) Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. Learning Web API? Get our eBook ASP.NET Core Web API Best Practices and become an expert for FREE! > GET THE BOOK << var textBytes = ("The great crocodile of Queensland can attain a length of 30 feet") Conversely, the encoding scheme will add a line break for every 76 characters. Line breaks can improve the readability of our Base64 text and also assist us while using tools that don’t deal well with long lines. ![]() We can use the options parameter to insert line breaks within our Base64 output. Using the last example, the value for this parameter was 6. We can use this parameter to state the number of elements or variables we want to encode. This parameter works hand-in-hand with the offset parameter. Var base64String = Convert.ToBase64String(textBytes, 6, 6) Similarly, the Base64 output will be different from the result we got when all the value was encoded: var textBytes = ("Hello world!") We must pair this parameter with the length option to make it work. Using our last example of “Hello world!”, if we want to encode only “world!”, we will set our optional parameter to 6. It states the position we want our encoding to start from. Var base64String = Convert.ToBase64String(textBytes)
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