/// <summary>
/// 用户删除行时获取id并从数据库中移除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dgvDelItem_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)
{
string delId = dgvDelItem.CurrentRow.Cells[0].Value.ToString();
BeginInvoke(new MethodInvoker(
() =>
{
USDataAccess.Delete($"delete from [commodity] where [id] = {delId};");
DGVDataSource = USDataAccess.Select("select id as 商品代码, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id group by commodityId;");
}
));
}
/// <summary>
/// 定时器,负责检查货柜上商品变动情况
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timerSerialPort_Tick(object sender, EventArgs e)
{
try
{
//读取数据,看看有没有新的RFID标签添加到货柜上
foreach (var str in serialPort.ReadAllData().Split('\n'))
{
if (str.Contains("addr:0x0001 read data:0x"))
{
//查询对应卡id的信息
string cardId = str.Substring(24, 4);
//判断rfid标签是否绑定
if (cardId.Equals("0000"))
{
return;
}
var dataTable = USDataAccess.Select($"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($"select tis as 所在货柜, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id and tid = {curTid} group by commodityId;");
}
}
}
serialPort.Write("CM+READ -addr=0x01");
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("遇到了一些问题,请检查串口是否被占用!", "异常");
return;
}
}
public SmartShelvesTerminal()
{
InitializeComponent();
//debug
USDataAccess.Delete("delete from [terminal] where tid = 0;");
//登记并显示货柜
curTid = USDataAccess.Select("select distinct [tid] from [terminal] where [tid] != 0;").Rows.Count + 1;
//相关事件
tbQueryCondition.Click += (x, y) => tbQueryCondition.Text = "";
this.Load += (x, y) =>
{
serialPort = new PL2303();
dgvDisplay.DataSource = USDataAccess.Select($"select tid 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;");
};
this.Activated += (x, y) => { serialPort?.Open(); timerSerialPort.Enabled = true; };
this.Deactivate += (x, y) => { serialPort?.Close(); timerSerialPort.Enabled = false; };
}
