{description} {excerpt}Opens an existing Excel spreadsheet.{excerpt} {signature:C#} public virtual Workbook Open(System.String fileName) {signature}{signature:vb.net} Public Overridable Function Open(ByVal fileName As String) As Workbook {signature} {parameters} {param:fileName}The path and name of the file to open. The path can be relative or absolute. The file must be a OOXML format \(Excel 2007 or later\) .xlsx file or BIFF8 format \(Excel 97 or later\) .xls file.{param} {returns}A [Workbook|Workbook] object representing the file opened.{returns} {exceptions} {exception:System.Exception}If the file cannot be found or opened, or if ExcelWriter cannot parse the file as a OOXML or BIFF8 file.{exception} {remarks}ExcelWriter supports Excel's OOXML \(Excel 2007 or later\) and BIFF8 \(Excel 97 or later\) format only. Do not use this method to open BIFF7 \(Excel 95\) files. {remarks} {example}{code:csharp|title=C#} Workbook wb = xla.Open(@"C:\Reports\Report.xlsx"); {code} {code:vb.net|title=vb.net} Dim wb As Workbook = xla.Open("C:\Reports\Report.xlsx"){code} {example} |