How Can I Reverse-Iterate Through a Text File Line by Line in C# Using an Iterator?

Reverse Line-by-Line Text File Reading in C# with Iterators

Efficiently reading a text file in reverse order presents a unique challenge, particularly with variable-length encodings like UTF-8. While no direct method exists in C#, a custom iterator-based solution provides an elegant approach.

The solution presented:

• Introduces a ReverseLineReader class, configurable with a specified encoding and a function to create a seekable stream.
• Employs a characterStartDetector function to reliably identify the start of a character within the byte stream, crucial for handling variable-length encodings.
• The GetEnumerator method initializes a buffer and iterates backward through the stream, leveraging characterStartDetector to reconstruct lines correctly.
• Robust error handling is included to gracefully manage unreadable or unseekable streams.

This method enables reverse iteration, yielding lines from the file's end to its beginning.

The above is the detailed content of How Can I Reverse-Iterate Through a Text File Line by Line in C# Using an Iterator?. For more information, please follow other related articles on the PHP Chinese website!