How to read data from a Excel Sheet indocument level VSTO solution?

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VS2015

I am creating a document level vsto solution for excel .
My excel is like :
sheet name : Sheet1
data :

columns- A B C D
Projetc1
Project2
Project3

I need to read column B values . So i wrote below code :

private void ThisWorkbook_Startup(object sender, System.EventArgs e)
{

Workbook wb =
Globals.Factory.GetVstoObject(Globals.ThisWorkbook.Application.ActiveWorkbook);
Worksheet ws = (Worksheet)wb.Worksheets[1];

string s = ws.Name;
var cell1 = ws.Range["B", Type.Missing];
var content = cell1.Value2;

}

But i am getting invalid cast error
Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Tools.Excel.Worksheet.

I need to read the column b values in a list .
PLease guide me how to do it .

Posted 23-Jan-14 17:57pm

prejval2006

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midnight_ · Answer 1 · 2014-01-23T19:39:00

error msg already tells you what the deal is:

Worksheet ws = (Worksheet)wb.Worksheets[1];
According to that, you cannot cast the object as workbook, since there is no workbook object at index 1.

if you're bound to use VSTO, then you should read this:
http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.workbook.activesheet.aspx

else, I would prefer odbc method

http://lmgtfy.com/?q=c%23+excel+odbc[^]