How to convert Excel sheet column names into numbers? [duplicate]

Answer 1

This function should work for an arbitrary length column name.

public static int GetColumnNumber(string name)
{
    int number = 0;
    int pow = 1;
    for (int i = name.Length - 1; i >= 0; i--)
    {
        number += (name[i] - 'A' + 1) * pow;
        pow *= 26;
    }

    return number;
}