Question

So, I can’t find any methods with file opening in Excel.Workbook or Excel.Application, and I am wondering why.

I have path to an Excel file, and I would like to manipulate it. I understand I have to use Excel.Application, Excel.Workbook, and Excel.Worksheet. The file to the Excel file is ExcelFilePath, what should I do to make it possible?

Answer 1

You first need to add the reference to Microsoft.Office.Interop.Excel to your project in order to use the Excel API, then fill the variables:

Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlWS As Excel.Worksheet

xlApp = New Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Open(sFilePath)
xlWS = CType(xlWorkBook.Worksheets(sheetNameOrIndex), Excel.Worksheet)

And then you only need to use the methods they have. For example:

Dim sVar as String = xlWS.Range("C5").Value.ToString()