使用Payroll的C＃应用程序。作为一个警告，我对这一切都很陌生，只是被吸进去享受它，但是在很短的时间内吸收很多东西。我目前正在学习LINQ和课程。我从我们的账户SQL服务器中获取发票行，并根据销售情况支付人员，并根据数据确定一些情况。请参阅以下示例：
Ord_Inv_No Delivery_Date Trmnl_Key TrmnlGrp_Key
INV-00059754 2016-05-02 07:00:00 23 3
INV-00059839 2016-05-02 16:01:00 56 3
这是数据的一小部分，但它给出了我想要分析的要点。我有一个课程如下所示：
class SalesItem
{
public string DriverName { get; set; }
public DriverData DriverData { get; set; }
public int TerminalKey { get; set; }
public int TerminalGroupKey { get; set; }
public string DeliveryDate { get; set; }
public string CustomerLocation { get; set; }
public int? CustomerLocationKey { get; set; }
public bool? IsCredited { get; set; }
public string InvoiceNumber { get; set; }
public string TermianlGroupDesc { get; set; }
public SalesItem(string driverName, int terminalKey, int terminalGroupKey, string deliveryDate,
string customerLocation, int? customerLocationKey, bool? isCredited, string invoiceNumber, string terminalGroupDesc)
{
this.DriverName = driverName;
this.TerminalKey = terminalKey;
this.TerminalGroupKey = terminalGroupKey;
this.DeliveryDate = deliveryDate;
this.CustomerLocation = customerLocation;
this.CustomerLocationKey = customerLocationKey;
this.IsCredited = isCredited;
this.InvoiceNumber = invoiceNumber;
this.TermianlGroupDesc = terminalGroupDesc;
}
我正在尝试实现一种方法1.将每个SalesItem（每一行）存储为一个缺少更好的单词的集合。我想迭代SalesItem的集合并找出一些内容，例如当一个发票行显示两次时使用不同的Trmnl_Key和两个不同的Ord_Inv_No具有完全相同的日期时作为彼此并返回两者的最高工资率。我为此编写了一些逻辑，它正在操纵我通过SQLConnection / Command / Reader / Etc抓取的DataTable，但是当处理一周的数据并且我无法获得时，所有这些都非常缓慢和繁琐比较工作可靠。更进一步，这些行将在WPF中的DataGrid中进行标记，以便在会计软件出现问题时验证其工资。
现在，我正在尝试保存集合，如下所示（这只是当前的迭代，我有几天值得尝试失败。）
private void GetInformation(object sender, SelectionChangedEventArgs e)
{
ComboBox currentItem = sender as ComboBox;
int driverKey = Convert.ToInt32(currentItem.SelectedValue);
DriverData driver = new DriverData();
driver.SetDriverData(driverKey);
int years = driver.ServiceYears;
List<SalesItem> items = (from o in transportationDb._Payroll_Orders
where o.Ord_Driver_Key == driverKey &&
o.Delivery_Date >= new DateTime(2016, 5, 2) && o.Delivery_Date <= new DateTime(2016, 5, 8)
select new SalesItem(
o.Driver_Name,
o.Trmnl_Key,
o.TrmnlGrp_Key,
o.Delivery_Date.ToString(),
o.CustLoc_Description,
o.Ord_CustLoc_Key,
o.Credits, o.Ord_Inv_No, o.TrmnlGrp_Description )).ToList();
dataGrid.ItemsSource = items;
}
非常感谢任何智慧或方向
答案 0 :(得分：0)
当然，这与你所拥有的不同，但试试这个并看看它是否适合你：
private void GetInformation(object sender, SelectionChangedEventArgs e)
{
ComboBox currentItem = sender as ComboBox;
int driverKey = Convert.ToInt32(currentItem.SelectedValue);
DriverData driver = new DriverData(); //What's this for?
driver.SetDriverData(driverKey); //What's this for?
int years = driver.ServiceYears; //What's this for?
var startDate=new DateTime(2016, 5, 2);
var endDate=new DateTime(2016, 5, 8);
var items = transportationDb._Payroll_Orders
.Where(o=>o.Ord_Driver_Key == driverKey)
.Where(o=>o.Delivery_Date >= startDate && o.Delivery_Date <= endDate)
.Select(o=>new SalesItem {
DriverName=o.Driver_Name,
...
});
dataGrid.ItemsSource = items;
}
如果您的Orders表在Ord_Driver_key和Delivery_Date上有索引，则此查询应该非常快。
答案 1 :(得分：0)
我希望这在某种程度上有所帮助。我不太确定你想要实现的目标。保存功能可能类似于以下内容，但我不确切知道您正在使用哪种连接。请注意，我正在检查以确保记录不存在。
private void Save(SalesItem item)
{
if(!transportationDb._Payroll_Orders.Any(p => p.Ord_Inv_No == item.InvoiceNumber))
{
transportationDb._Payroll_Orders.Add(item.PayrollOrder);
transportationDb.SaveChanges();
}
else
{
// Already exists
}
}
根据您的喜好更新您的课程，但我会从对您的对象看起来像的有限知识的方式这样做。
class SalesItem
{
public SalesItem(_Payroll_Orders po == null, DriverData dd == null)
{
this._Payroll_Order = po != null ? po : new _Payroll_Orders();
this.DriverData = dd != null ? dd : new DriverData();
}
private _Payroll_Orders _Payroll_Order { get; set; }
public _Payroll_Orders PayrollOrder
{
get { return _Payroll_Order; }
set { _Payroll_Order = value; }
}
public string DriverName
{
get { return _Payroll_Order.Driver_Name; }
set { _Payroll_Order.Driver_Name= value; }
}
public DriverData DriverData { get; set; }
public int TerminalKey
{
get { return _Payroll_Order.Trmnl_Key; }
set { _Payroll_Order.Trmnl_Key= value; }
}
public int TerminalGroupKey
{
get { return _Payroll_Order.TrmnlGrp_Key; }
set { _Payroll_Order.TrmnlGrp_Key= value; }
}
public DateTime DeliveryDate
{
get { return _Payroll_Order.Delivery_Date; }
set { _Payroll_Order.Delivery_Date= value; }
}
public string CustomerLocation
{
get { return _Payroll_Order.CustLoc_Description; }
set { _Payroll_Order.CustLoc_Description = value; }
}
public int? CustomerLocationKey
{
get { return _Payroll_Order.Ord_CustLoc_Key; }
set { _Payroll_Order.Ord_CustLoc_Key = value; }
}
public bool? IsCredited
{
get { return _Payroll_Order.Credits; }
set { _Payroll_Order.Credits = value; }
}
public string InvoiceNumber
{
get { return _Payroll_Order.Ord_Inv_No; }
set { _Payroll_Order.Ord_Inv_No = value; }
}
public string TermianlGroupDesc
{
get { return _Payroll_Order.TrmnlGrp_Description; }
set { _Payroll_Order.TrmnlGrp_Description = value; }
}
}
然后你可以在这里更改你的功能，所以你只需要选择'new SalesItem（o，driver）'：
private void GetInformation(object sender, SelectionChangedEventArgs e)
{
ComboBox currentItem = sender as ComboBox;
int driverKey = Convert.ToInt32(currentItem.SelectedValue);
DriverData driver = new DriverData();
driver.SetDriverData(driverKey);
int years = driver.ServiceYears;
List<SalesItem> items = (from o in transportationDb._Payroll_Orders
where o.Ord_Driver_Key == driverKey &&
o.Delivery_Date >= new DateTime(2016, 5, 2) &&
o.Delivery_Date <= new DateTime(2016, 5, 8)
select new SalesItem(o, driver)).ToList();
dataGrid.ItemsSource = items;
}