public GoodsManagementSubsystem()
{
InitializeComponent();
//行状态事件,用户添加新行时进行标记
dgvAddItem.UserAddedRow += (x, y) => isAdd = true;
//窗体加载时的动作
this.Load += (x, y) =>
{
serialPort = new PL2303();
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;");
};
//串口随窗体焦点改变而开/关
this.Activated += (x, y) => { serialPort?.Open(); timerBindingCard.Enabled = true; };
this.Deactivate += (x, y) => { serialPort?.Close(); timerBindingCard.Enabled = false; };
//记录输入的查询内容
tbConditionAtMgr.LostFocus += (x, y) => queryCondition = $"'{tbConditionAtMgr.Text}'";
tbConditionAtDel.LostFocus += (x, y) => queryCondition = $"'{tbConditionAtDel.Text}'";
tbConditionAtBinding.LostFocus += (x, y) => queryCondition = $"'{tbConditionAtBinding.Text}'";
//输入时自动清空原有内容
tbConditionAtMgr.Click += (x, y) => tbConditionAtMgr.Text = "";
tbConditionAtDel.Click += (x, y) => tbConditionAtDel.Text = "";
tbConditionAtBinding.Click += (x, y) => tbConditionAtBinding.Text = "";
}
/// <summary>
/// 绑定RFID卡与商品
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnBindingRfid_Click(object sender, EventArgs e)
{
if (curCardId == null)
{
MessageBox.Show("请放卡!");
return;
}
if (dgvBindingItem.CurrentRow == null)
{
MessageBox.Show("请选择商品!");
}
if (curCardId.Equals(""))
{
Random rand = new Random();
int temp = rand.Next(1, 10000);
for (; USDataAccess.Select($"select * from [terminal] where [cardId] like '{temp}';").Rows.Count > 0;)
{
temp = rand.Next(1, 10000);
}
curCardId = temp.ToString();
}
for (; !serialPort.ReadAllData().Contains("addr:0x0001 para:0x");)
{
serialPort.Write($"CM+WRITE -addr=0x01 -value=0x{curCardId}");
}
USDataAccess.Insert($"insert into [terminal] values(0,'{curCardId}',{dgvBindingItem.CurrentRow.Cells[0].Value.ToString()});");
curCardId = null;
}
/// <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($"update [commodity] set {USDataAccess.CommodityColumns[e.ColumnIndex]} = '{newCellValue}' where [id] = {id};");
BeginInvoke(new MethodInvoker(() => DGVDataSource = USDataAccess.Select("select id as 商品代码, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id group by commodityId;")));
}
/// <summary>
/// 用户删除行时获取id并从数据库中移除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dgvDelItem_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)
{
string delId = dgvDelItem.CurrentRow.Cells[0].Value.ToString();
BeginInvoke(new MethodInvoker(
() =>
{
USDataAccess.Delete($"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>
/// 从数据库中查询相关信息并刷新datagridview的数据源
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Search_Click(object sender, EventArgs e)
{
if (tbQueryCondition.Text.Equals("") || cmbQuerySpecies.Text.Equals("请选择查询类别"))
{
MessageBox.Show("请设定查询条件!");
return;
}
try
{
dgvDisplay.DataSource = USDataAccess.Select($"select tid as 所在货柜, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id and tid != 0 where {querySpecies} '{tbQueryCondition.Text}' group by commodityId;");
}
catch (Exception)
{
MessageBox.Show("查询失败,请检查输入是否正确.");
}
}
/// <summary>
/// 定时器,
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timerBindingCard_Tick(object sender, EventArgs e)
{
if (dgvBindingItem.CurrentRow != null && dgvBindingItem.CurrentRow.Index >= 0)
{
try
{
//读取RFID标签数据
foreach (var str in serialPort.ReadAllData().Split('\n'))
{
if (str.Contains("addr:0x0001 read data:0x"))
{
string cardId = str.Substring(24, 4);
//查询数据库中有无此rfid标签的识别码
DataTable table = USDataAccess.Select($"select * from [terminal] where [cardId] like '{cardId}'");
if (table.Rows.Count == 0)
{
curCardId = "";
rtbShowAtBinding.Text = "卡片尚未绑定.";
return;
}
curCardId = cardId;
//卡如果属于已经绑定的卡,则将商品id与表中数据比较然后输出商品信息
string cid = table.Rows[0][2].ToString();
foreach (DataGridViewRow row in dgvBindingItem.Rows)
{
if (row.Cells[0].Value.ToString().Equals(cid))
{
rtbShowAtBinding.Text = "rfid标签当前绑定的商品为:\n";
foreach (DataGridViewCell cell in row.Cells)
{
rtbShowAtBinding.AppendText(dgvBindingItem.Columns[cell.ColumnIndex].Name + ":\t");
rtbShowAtBinding.AppendText(cell.Value + "\n");
}
}
}
}
}
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;
}
}
}// end of timer
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSearch_Click(object sender, EventArgs e)
{
if (queryCondition == null || querySpecies == null)
{
MessageBox.Show("请设定查询条件!");
return;
}
try
{
DGVDataSource = USDataAccess.Select($"select id as 商品代码, name as 商品名, price as 价格, manufacturer as 生产厂家, productiondate as 生产日期, validuntil as 有效期, count(commodityId) as 库存数 from[terminal] as t1 join[commodity] as t2 on t1.commodityId = t2.id where {querySpecies + queryCondition} group by commodityId;");
}
catch (Exception)
{
MessageBox.Show("查询失败,请检查输入是否正确.");
}
querySpecies = queryCondition = null;
}
/// <summary>
/// 定时器,负责检查货柜上商品变动情况
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timerSerialPort_Tick(object sender, EventArgs e)
{
try
{
//读取数据,看看有没有新的RFID标签添加到货柜上
foreach (var str in serialPort.ReadAllData().Split('\n'))
{
if (str.Contains("addr:0x0001 read data:0x"))
{
//查询对应卡id的信息
string cardId = str.Substring(24, 4);
//判断rfid标签是否绑定
if (cardId.Equals("0000"))
{
return;
}
var dataTable = USDataAccess.Select($"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; };
}
/// <summary>
/// 添加新的数据行到数据库
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dgvAddItem_RowEnter(object sender, DataGridViewCellEventArgs e)
{
if (dgvAddItem.CurrentRow != null && dgvAddItem.CurrentRow.Index == rowCount && isAdd == true)
{
string values = "";
foreach (DataGridViewCell item in dgvAddItem.Rows[rowCount].Cells)
{
if (item.Value.Equals(System.DBNull.Value))
{
MessageBox.Show("数据不完整!", "添加新行失败");
dgvAddItem.ClearSelection();
dgvAddItem.Rows[item.RowIndex].Selected = true;
item.Selected = true;
return;
}
if (item.ValueType.Equals(typeof(int)))
{
values += item.Value.ToString() + ',';
}
else
{
values += $"'{item.Value.ToString()}',";
}
}
try
{
USDataAccess.Insert($"insert into [commodity] values({values.Trim(',')});");
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;")));
isAdd = false;
}
catch (Exception)
{
throw;
}
}
}
