根据选定的datagridview组合框项在datagridview列中显示值

Question

我有一个包含5列的数据网格视图（4个dgvtextbox和一个dgv组合框） dgv combobox（unit）与我的访问dbase绑定。

我的dgv看起来像这样：

INGREDIENTS | QUANTITY | UNIT | PRICE | SUBTOTAL

我想根据我的dgvcombobox选择和成分列中的项目自动显示我的价格（保存在dbase上）。例如：我的配料栏上的项目是“糖”，我在单位栏（dgv组合框）上选择了“tsp”，然后在dbase上保存的tsp糖价会自动显示在价格栏上。

（访问查询是从ingredientsTABLE中选择价格，其中单位和成分= dgv值）

我的代码是这样的：

Private Sub DataGridView1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles dgvINGREDIENTS.MouseMove

    ''ADDING ITEMS FROM 2 COLUMNS IN DATAGRIDVIEW

    For Each row As DataGridViewRow In dgvINGREDIENTS.Rows

        Dim txtunit = row.Cells("col_unit").Value
        Dim txtingredients = row.Cells("col_ingredients").Value

        Dim unitquery As String = "SELECT price from INGREDIENTS where unit = '" & txtunit & "' AND ingredient='" & txtingredients & "' "
        row.Cells("col_price").Value = unitquery
        'row.Cells("col_sub").Value = row.Cells("col_qty").Value * row.Cells("col_price").Value
        row.Cells("col_sub").Value = row.Cells("col_qty").Value * row.Cells(unitquery).Value
    Next

    '' GET COLUMN TOTAL VALUE IN DATAGRIDVIEW AND DISPLAY TO LABEL

    Dim total As String = 0

    For i As Integer = 0 To dgvINGREDIENTS.RowCount - 1

        total += dgvINGREDIENTS.Rows(i).Cells(4).Value

    Next

    label_total.Text = total

End Sub

希望你能帮助我...非常感谢:)。