我剛開始一個新項目,並利用這個場合習慣了MVVM。綁定從ObservableCollection到Datagrid的列表中的類的屬性
但我很躊躇,特殊情況下,我嘗試將自定義類的列表從ObservableCollection綁定到Datagrid。 我使用以下星座,我可以完成的是顯示集合的Datagrid列。 https://snag.gy/2MDEuS.jpg
如果我試圖進一步推進到對象與它不是與下面的錯誤指示工作{綁定路徑= Supplier.Supplier},編譯器是無法從列表中讀出的屬性,如我解釋錯誤:
System.Windows.Data Error: 40 :
BindingExpression path error:
'Supplier' property not found on 'object' ''List`1' (HashCode=55391087)'.
BindingExpression:Path=Supplier.Supplier;
DataItem='O_SupplierReport' (HashCode=61342683);
target element is 'TextBlock' (Name='');
target property is 'Text' (type 'String')
還有其他的文本框,我可以很容易地結合= {綁定路徑= MySelectedItem.SupplierName}填充例如。 你能給我一個建議嗎?
//ViewModel
public class V_SupplierReport: INotifyPropertyChanged
{
public ObservableCollection<O_SupplierReport> _SupplierReports;
public O_SupplierReport MySelectedItem { get; set; }
private List<S_Supplier> _Supplier { get; set; }
public event PropertyChangedEventHandler PropertyChanged;
protected internal void OnPropertyChanged(string propertyname)
{
if (!(PropertyChanged == null))
PropertyChanged(this, new PropertyChangedEventArgs(propertyname));
}
public ObservableCollection<O_SupplierReport> SupplierReports
{
get { return _SupplierReports; }
set { _SupplierReports = value; }
}
public V_SupplierReport()
{
this._SupplierReports = new ObservableCollection<O_SupplierReport>();
}
public int Lieferanten
{
get { return _Supplier; }
set
{
if (_Supplier == value) return;
_Supplier = value;
OnPropertyChanged("Supplier");
}
}
}
//Model
public class O_SupplierReport : INotifyPropertyChanged
{
public List<S_Supplier> Supplier { get; set; }
public O_SupplierReport(List<S_Supplier> sup)
{
this.Supplier = sup;
}
public event PropertyChangedEventHandler PropertyChanged;
protected internal void OnPropertyChanged(string propertyname)
{
if (!(PropertyChanged == null))
PropertyChanged(this, new PropertyChangedEventArgs(propertyname));
}
}
//Classpublic class S_Supplier
{
public int Supplier { get; set; }
public S_Supplier(int sup)
{
Supplier = sup;
}
}
//View
<Window x:Class="APP.SDX.SupplierReports.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="483.8" Width="640" DataContext="{Binding SupplierReports}">
<Grid>
<DataGrid Name="G_lb_Selektion_Lieferanten"
Margin="0,26,0,27"
ItemsSource="{Binding Path=SupplierReports}"
SelectedItem="{Binding Path=MySelectedItem}"
AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="Lieferant" Binding="{Binding Supplier}" />
<DataGridTextColumn Header="Lieferant" Binding="{Binding Path=Supplier}" />
<DataGridTextColumn Header="Lieferant" Binding="{Binding Path=Supplier.Supplier}" />
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
附加答案我找到了一個更合適的解決方案,無需DataGridTem plateColumn: ItemsSource =「{Binding Path = MySelectedItem.Supplier}」DisplayMemberPath =「Supplier」in the view did the trick too – kurdy