error แบบนี้แก้ยังไงคะ / แก้ไขได้ บันทึกไม่ได้ (VB) - Failed to convert parameter value from a String to Double

 Dim cm As New SqlCommand
        With cm
            .CommandType = CommandType.Text
            .CommandText = s
            .Connection = cn
            .Parameters.Clear()
            .Parameters.Add("pid", SqlDbType.NVarChar, 10).Value = LblID.Text
            .Parameters.Add("pname", SqlDbType.NVarChar, 50).Value = TbName.Text
            .Parameters.Add("brand", SqlDbType.NVarChar, 2).Value = CbbBrand.SelectedValue
            .Parameters.Add("cate", SqlDbType.NVarChar, 3).Value = CbbCate.SelectedValue
            .Parameters.Add("cost", SqlDbType.Float).Value = TbPrice.Text
            .Parameters.Add("sprice", SqlDbType.Float).Value = TbSale.Text
            .Parameters.Add("st", SqlDbType.Float).Value = TbStock.Text
            .ExecuteNonQuery()