Question

I’d love to know why this code puts the value 5 in the columns cells

 For Each row As DataGridViewRow In Me.datagridADRORD.Rows
        row.Cells("Historical Diff").Value = 5
    Next

But this code doesn’t work, ie the cell is left blank. There are values in the formulas cells so there should be a value to put in the calculated column

 For Each row As DataGridViewRow In Me.datagridADRORD.Rows
        row.Cells("Historical Diff").Value = row.Cells("ADR Price").Value - row.Cells("ORD Price").Value
    Next

Answer 1

Please try Cell index, instead of Cell Name.

//1 is cell index

row.Cells(1).Value = 5