我正在尝试将文件列表上传到数据库。加载的工作方式是用户选择一个文件,然后将该文件读入ObservableCollection。数据包括FileMeta信息和基金信息。对于每个文件,如果缺少某些基金信息,则向用户显示该基金以填写缺失的信息。多个文件可能包含缺少信息的同一基金。我在逐个文件的基础上显示缺少的资金信息。我的目标是拥有一个基金模型和多个基金信息显示。当基金信息在一个位置更新时,我希望所有位置都反映出更新。我已经能够在多个地方显示基金信息,但不能在后台显示一个模型。如何在我的所有数据网格后面获得一个模型?
<DataGrid Grid.Row="1" Grid.ColumnSpan="3" Margin="10" ItemsSource="{Binding Path=Files}" SelectedValue="{Binding Path=SelectedUploadFile}" AutoGenerateColumns="False" CanUserAddRows="False">
<DataGrid.Columns>
<!--Removed for brevity-->
</DataGrid.Columns>
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<DataGrid ItemsSource="{Binding Path=Funds}" CanUserAddRows="False" AutoGenerateColumns="False" VerticalScrollBarVisibility="Visible" MaxHeight="200">
<DataGrid.Columns>
<DataGridTemplateColumn Header="Fund Name">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Label Content="{Binding Path=FundName, Mode=OneWay}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
</DataGrid>
public class AuditTests : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
// Objects
FileLoader fileLoader = new FileLoader();
private void RaisePropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
public ObservableCollection<FileMeta> Files { get; set; }
public AuditTests()
{
// Collection Initialization
InitializeData();
}
public void InitializeData()
{
Files = new ObservableCollection<FileMeta>() { new FileMeta () };
}
private void AddFileRequested()
{
Files = new ObservableCollection<FileMeta>() { new FileMeta () };
SaveFilesCommand.RaiseCanExecuteChanged();
}
}
public partial class FileMeta : INotifyPropertyChanged
{
private ObservableCollection<Fund> _funds;
public event PropertyChangedEventHandler PropertyChanged;
public FileMeta()
{
Funds = new ObservableCollection<Fund>();
}
private void RaisePropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
public ObservableCollection<Fund> Funds
{
get
{
return _funds;
}
set
{
if (_funds != value)
{
_funds = value;
RaisePropertyChanged("Funds");
}
}
}
}
public class FileLoader
{
public ObservableCollection<Fund> Funds { get; set; }
public void LoadFile(FileMeta file)
{
newFund = GetFund(row.Cell(1).Value.ToString());
file.Funds.Add(newFund);
}
private Fund GetFund(string fundName)
{
using (var db = new IISContext())
{
// If it exists in the database
if ((from f in db.Fund where f.FundName == fundName select f).Count() == 0)
{
// If we've already loaded this time
var existingFunds = (from f in Funds where f.FundName == fundName select f);
if (existingFunds.Count() == 0)
{
Fund newFund = new Fund();
newFund.FundId = Guid.NewGuid();
newFund.Cusip = "";
newFund.FundFamilyId = (from ff in db.FundFamily where ff.FundFamilyName == "Default" select ff.FundFamilyId).First();
newFund.FundName = fundName;
Funds.Add(newFund);
return newFund;
}
else
{
return existingFunds.First();
}
}
else
{
return (from f in db.Fund where f.FundName == fundName select f).First();
}
}
}
}
public partial class Fund : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private Guid _fundID;
private string _cusip;
private string _fundName;
private bool _selected;
private FundFamily _fundFamily;
private void RaisePropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
public Fund()
{
PortfolioHolding = new HashSet<PortfolioHolding>();
}
public Guid FundId
{
get
{
return _fundID;
}
set
{
if (_fundID != value)
{
_fundID = value;
RaisePropertyChanged("FundID");
}
}
}
public string Cusip
{
get
{
return _cusip;
}
set
{
if (_cusip != value)
{
_cusip = value;
RaisePropertyChanged("Cusip");
}
}
}
public Guid FundFamilyId { get; set; }
public string FundName
{
get
{
return _fundName;
}
set
{
if (_fundName != value)
{
_fundName = value;
RaisePropertyChanged("FundName");
}
}
}
[NotMapped]
public bool Selected
{
get
{
return _selected;
}
set
{
if (_selected != value)
{
_selected = value;
RaisePropertyChanged("Selected");
}
}
}
public virtual ICollection<PortfolioHolding> PortfolioHolding { get; set; }
public virtual FundFamily FundFamily
{
get
{
return _fundFamily;
}
set
{
if (_fundFamily != value)
{
_fundFamily = value;
RaisePropertyChanged("FundFamily");
}
}
}
}
答案 0 :(得分:0)
听起来你想要一份主要的基金清单。每次从文件加载基金时,首先检查该基金的主列表(假设他们有某种类型的唯一ID;可能是股票代码?)。如果它已经存在,请使用现有实例而不是创建新实例。如果它尚未存在,请创建它并将其添加到主列表中。
要么是这样,要么每次更新基金时,递归搜索您的资金文件集合,其身份与您刚刚更新的资产相同,并更新它们以匹配。
你想要的是这样的:
AuditTests
Files: [
FileMeta
Funds: [ Fund A, Fund C ]
FileMeta
Funds: [ Fund A, Fund B, Fund D ]
]
FileLoader
Funds: [ Fund A, Fund B, Fund C, Fund D ]
“基金A”并不仅仅意味着它们看起来相同,它与实际的Fund
对象实例相同。
Fund
需要正确实施INotifyPropertyChanged
。