/// <summary>
/// 当用户改变了单元格的值时对数据库进行更新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dgvMgrItem_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
string id = dgvMgrItem.Rows[e.RowIndex].Cells[0].Value.ToString();
string newCellValue = dgvMgrItem.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
//USDataAccess.Update("update [commodity] set [xx] = xxxx where [xxx] = 'xxx';");
USDataAccess.Update($"update [commodity] set {USDataAccess.CommodityColumns[e.ColumnIndex]} = '{newCellValue}' where [id] = {id};");
BeginInvoke(new MethodInvoker(() => DGVDataSource = USDataAccess.Select("select id as 商品代码, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id group by commodityId;")));
}
/// <summary>
/// 定时器,负责检查货柜上商品变动情况
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timerSerialPort_Tick(object sender, EventArgs e)
{
try
{
//读取数据,看看有没有新的RFID标签添加到货柜上
foreach (var str in serialPort.ReadAllData().Split('\n'))
{
if (str.Contains("addr:0x0001 read data:0x"))
{
//查询对应卡id的信息
string cardId = str.Substring(24, 4);
//判断rfid标签是否绑定
if (cardId.Equals("0000"))
{
return;
}
var dataTable = USDataAccess.Select($"select * from [terminal] where [cardId] like '{cardId}';");
if (dataTable.Rows.Count > 0)
{
//判断是添加商品到货柜还是拿走商品
if (int.Parse(dataTable.Rows[0][0].ToString()) == 0)
{
USDataAccess.Update($"update [terminal] set [tid] = {curTid} where [cardId] like '{cardId}';");
}
else
{
USDataAccess.Delete($"delete from [terminal] where [cardId] like '{cardId}';");
serialPort.Write("CM+WRITE -addr=0x01 -value=0x0000");
}
dgvDisplay.DataSource = USDataAccess.Select($"select tis as 所在货柜, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id and tid = {curTid} group by commodityId;");
}
}
}
serialPort.Write("CM+READ -addr=0x01");
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("遇到了一些问题,请检查串口是否被占用!", "异常");
return;
}
}
