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我試圖從現在開始完成此任務。我正在開發一個使用MVVM框架的基於Windows的應用程序，它具有綁定到observablecollection的Datagrid。第一列是綁定到一個類中的項目的組合框。我想要發生的事情是，在第一次加載時，網格應該用從Combobox設置的數據庫中拉出的值填充到合適的值（THIS工作完美），但隨後在用戶更改組合框值時，相應的其他列將被更新（此部分不工作）....請幫助！WPF MVVM Datagrid具有Combobox更新selectedItem上的其他列更改
這裏是我的XMAL，InstrumentType產業應該得到填充基於在儀器名稱組合框中選擇的值
<DataGrid Grid.Row="3" Grid.ColumnSpan="4" AutoGenerateColumns="False" ItemsSource="{Binding obFundPartipants}"
SelectionMode="Extended" SelectionUnit="FullRow" >
<DataGrid.Columns>
<DataGridTextColumn Header="Sr.No" Width="40"/>
<DataGridTemplateColumn Header="Instrument Name">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<!--<ComboBox
ItemsSource=
"{Binding DataContext.lstInstrumentMasterAll,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type Window }}}" DisplayMemberPath="InstrumentName"
SelectedValuePath="InstrumentName"
SelectedValue="{Binding Path=InstrumentDetails.InstrumentName}"
SelectedItem="{Binding InstrumentDetails, Mode=TwoWay}" />-->
<ComboBox
ItemsSource=
"{Binding DataContext.obInstrumentMaster,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type Window }}}" DisplayMemberPath="InstrumentName"
SelectedValuePath="InstrumentName"
SelectedValue="{Binding Path=InstrumentDetails.InstrumentName}"
SelectedItem="{Binding imSelectedInstrument, ValidatesOnDataErrors=True, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<!--<DataGridTextColumn Header="Instrument Name" Width="200" Binding="{Binding Path=InstrumentDetails.InstrumentName}" />-->
<DataGridTextColumn Header="Instrument Type" Width="100" Binding="{Binding Path=InstrumentDetails.InstrumentType}" IsReadOnly="True" />
<DataGridTextColumn Header="Industry" Width="100" Binding="{Binding Path=InstrumentDetails.IndustryName}" IsReadOnly="True"/>
<DataGridTextColumn Header="Pur Date" Width="60" Binding="{Binding Path=TransactionDate}" />
<DataGridTextColumn Header="Quantity" Width="60" Binding="{Binding Path=BalanceQty}" />
<DataGridTextColumn Header="Buy Price" Width="60" Binding="{Binding Path=AveragePrice}" />
<DataGridTextColumn Header="Invested Amount" Width="100" Binding="{Binding Path=AverageAmount}" />
<DataGridTextColumn Header="Cur Price" Width="60" Binding="{Binding Path=InstrumentDetails.CurPrice}" />
<DataGridTextColumn Header="Current Value" Width="100" Binding="{Binding Path=CurrentAmount}"/>
</DataGrid.Columns>
</DataGrid>
View Model
private InstrumentMaster _imSelectedInstrument; public InstrumentMaster imSelectedInstrument { get { return _imSelectedInstrument; } set { _imSelectedInstrument = value; base.NotifyPropertyChanged("imSelectedInstrument"); UpdateInstrumentDetails(); } }
private ObservableCollection<Transaction> _obFundPartipants; public ObservableCollection<Transaction> obFundPartipants { get { return _obFundPartipants; } set { _obFundPartipants = value; base.NotifyPropertyChanged("obFundPartipants"); UpdateInstrumentDetails(); } }
public class Transaction : INotifyPropertyChanged
{
private DateTime _TransactionDate; public DateTime TransactionDate { get { return _TransactionDate; } set { _TransactionDate = value;} }
private String _TransactionType; public String TransactionType { get { return _TransactionType; } set { _TransactionType = value;} }
private int _FundID; public int FundID { get { return _FundID; } set { _FundID = value;} }
private int _PortfolioID; public int PortfolioID { get { return _PortfolioID; } set { _PortfolioID = value; } }
private int _InstrumentID; public int InstrumentID { get { return _InstrumentID; } set { _InstrumentID = value;} }
private String _InstrumentKey; public String InstrumentKey { get { return _InstrumentKey; } set { _InstrumentKey = value;} }
private InstrumentMaster _InstrumentDetails; public InstrumentMaster InstrumentDetails { get { return _InstrumentDetails; } set { _InstrumentDetails = value; } }
private String _InstrumentType; public String InstrumentType { get { return _InstrumentType; } set { _InstrumentType = value; } }
private double _TransactionQty; public double TransactionQty { get { return _TransactionQty; } set { _TransactionQty = value;} }
private double _TransactionPrice; public double TransactionPrice { get { return _TransactionPrice; } set { _TransactionPrice = value;} }
private double _TransactionAmount; public double TransactionAmount { get { return _TransactionPrice * _TransactionQty; } set { _TransactionAmount = _TransactionPrice * _TransactionQty; } }
private String _TransactionNotes; public String TransactionNotes { get { return _TransactionNotes; } set { _TransactionNotes = value;} }
private String _FundName; public String FundName { get { return _FundName; } set { _FundName = value; } }
private String _InstrumentName; public String InstrumentName { get { return _InstrumentName; } set { _InstrumentName = value; } }
private Boolean _TransactionFlag; public Boolean TransactionFlag { get { return _TransactionFlag; } set { _TransactionFlag = value; } }
private DateTime _FundTransactionDate; public DateTime FundTransactionDate { get { return _FundTransactionDate; } set { _FundTransactionDate = value; } }
private double _BalanceQty; public double BalanceQty { get { return _BalanceQty; } set { _BalanceQty = value; } }
private double _AveragePrice; public double AveragePrice { get { return _AveragePrice; } set { _AveragePrice = value; } }
private double _AverageAmount; public double AverageAmount { get { return _AveragePrice * _BalanceQty; } }
private double _CurrentAmount; public double CurrentAmount { get { return _CurrentAmount; } set { _CurrentAmount = value; } }
public void OnPropertyChanged(string p)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(p));
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
public class InstrumentMaster
{
private Boolean _SelectedInstrument; public Boolean SelectedInstrument { get { return _SelectedInstrument; } set { _SelectedInstrument = value; } }
private Boolean _Checked; public Boolean Checked { get { return _Checked; } set { _Checked = value; } }
private int _InstrumentID; public int InstrumentID { get { return _InstrumentID; } set { _InstrumentID = value; } }
private String _InstrumentKey; public String InstrumentKey { get { return _InstrumentKey; } set { _InstrumentKey = value; } }
private String _InstrumentName; public String InstrumentName { get { return _InstrumentName; } set { _InstrumentName = value; } }
private String _InstrumentType; public String InstrumentType { get { return _InstrumentType; } set { _InstrumentType = value; } }
private String _ISINCD; public String ISINCD { get { return _ISINCD; } set { _ISINCD = value; } }
private int _IndustryID; public int IndustryID { get { return _IndustryID; } set { _IndustryID = value; } }
private String _IndustryName; public String IndustryName { get { return _IndustryName; } set { _IndustryName = value; } }
private int _Active; public int Active { get { return _Active; } set { _Active = value; } }
private int _PortfolioID; public int PortfolioID { get { return _PortfolioID; } set { _PortfolioID = value; } }
private double _BalanceQuantity; public double BalanceQuantity { get { return _BalanceQuantity; } set { _BalanceQuantity = value; } }
private int _PersonalFundID; public int PersonalFundID { get { return _PersonalFundID; } set { _PersonalFundID = value; } }
private double _CurPrice; public double CurPrice { get { return _CurPrice; } set { _CurPrice = value; } }
private String _CurPriceType; public String CurPriceType { get { return _CurPriceType; } set { _CurPriceType = value; } }
private DateTime _CurPriceDate; public DateTime CurPriceDate { get { return _CurPriceDate; } set { _CurPriceDate = value; } }
}
你應該叫'OnPropertyChanged'每個屬性，它會影響用戶界面的變化，即在'MainWindow'中。嘗試將其稱爲'InstrumentType'屬性。 –
你也想在你的viewmodel中使用一個模型，並且無論出於何種原因都不要複製所有的屬性。 – Jim
@Jim，我知道我有一個冗餘的代碼，我需要清理。我確實有另一個類（InstrumentMaster）在Transaction calss中提到，它只是我第一次試圖讓它工作，然後做清理。 – BigData