How to Parse XLS Excel Files Row by Row in Javascript/HTML5?

Row-Wise Parsing of XLS Excel Files in Javascript/HTML5

Reading Excel files row by row can be a challenge, especially when dealing with irregular character encodings. To address this, let's explore a solution that converts Excel files (in XLS format) to JSON objects.

Method:

The provided Javascript function, ExcelToJSON, is designed to handle XLS files. It follows a step-by-step process:

1. File Reading: Using the FileReader API, it asynchronously reads the file into a binary string.
2. Workbook Parsing: The XLSX library is employed to extract the workbook from the binary string.
3. Sheet Iteration: Individual sheets within the workbook are iterated through.
4. Row Conversion: For each sheet, the sheet data is converted to an array of row objects.
5. JSON Output: The row objects are stringified and returned as a JSON object.

Example:

To use the function, simply pass an XLS file as a parameter:

<code class="javascript">var excelToJSON = new ExcelToJSON();
excelToJSON.parseExcel(file);</code>

The parseExcel function takes a promise to handle asynchronous operations.

Conclusion:

This Javascript solution provides a robust method for reading XLS Excel files row by row and converting them to JSON objects. It addresses the issue of weird characters and streamlines the process of data extraction from Excel spreadsheets.

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