Cara Menghitung Jumlah Total dari Field tertentu di Datagridview

Dim a,temp As Decimal
        a = 0.0
        For t As Decimal = 0.0 To dg_nilai.Rows.Count - 1
               temp = Replace(dg_nilai.Rows(t).Cells("nama_field").Value, ",", ".")
               a += Val(temp)
        Next
        msgbox(a)
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Semoga bermanfaat.
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