Question

I have a excel table with 1 sheet. That sheet has headers in row 1.
One of the headers is Amount.

I want to read all rows from that header and get the sum of it independently of the number or rows, which is never the same, into a variable of type float.

I’m doing this with c#.

I open the workbook, I get the active sheet and then nothing, I get blocked.

How do I go about this?
Rui Martins

Answer 1

You could use OleDB instead of Excel.Interop

string con = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\test.xls;" + 
              "Extended Properties='Excel 8.0;HDR=Yes;'";
using(OleDbConnection c = new OleDbConnection(con))
{
    c.Open();
    string selectString = "SELECT SUM(Amount) FROM [Sheet1$]";
    using(OleDbCommand cmd1 = new OleDbCommand(selectString))
    {
       cmd1.Connection = c;
 var result = cmd1.ExecuteScalar();
       Console.WriteLine(result);
    }
 }

This example use the old Microsoft.Jet.OleDB.4.0 provider, but works equally with the new Microsoft.ACE.OLEDB.12.0