我能够从我的树视图中检索所选的项目值。现在我想基于该值更改ScrollViewer控件中的内容。我正在尝试显示Facility对象的属性值，该对象包含包含Tanks的Containments。
如果我的解释不够明确，我是编程抱歉的新手。 谢谢。
MyWindow.xaml
<Window.DataContext>
<local:VisioFacilityExportViewModel/>
</Window.DataContext>
<Window.Resources>
<DataTemplate x:Key="FacilityTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<Label Content="Facility ID:"/>
<TextBox Grid.Row="0" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].FacilityID}"/>
<Label Content="Address:" Grid.Row="1"/>
<TextBox Grid.Row="1" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Address}"/>
<Label Content="Description:" Grid.Row="2"/>
<TextBox Grid.Row="2" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Description}"/>
<Label Content="Layout And Drainage:" Grid.Row="3"/>
<TextBox Grid.Row="3" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].LayoutAndDrainage}"/>
<Label Content="Latitude:" Grid.Row="4"/>
<TextBox Grid.Row="4" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Latitude}"/>
<Label Content="Longitude:" Grid.Row="5"/>
<TextBox Grid.Row="5" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Longitude}"/>
<Label Content="City:" Grid.Row="6"/>
<TextBox Grid.Row="6" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].City.Name}"/>
<Label Content="County:" Grid.Row="7"/>
<TextBox Grid.Row="7" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].County.Name}"/>
<Label Content="Name:" Grid.Row="8"/>
<TextBox Grid.Row="8" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Name}"/>
<Label Content="Run:" Grid.Row="9"/>
<TextBox Grid.Row="9" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].Run}"/>
<Label Content="Surface Flow Direction:" Grid.Row="10"/>
<TextBox Grid.Row="10" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].SurfaceFlowDirection}"/>
<Label Content="API Number:" Grid.Row="11"/>
<TextBox Grid.Row="11" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].APINumber}"/>
<Label Content="Distance To Navigable Waters:" Grid.Row="12"/>
<TextBox Grid.Row="12" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].DistanceToNavigableWaters}"/>
<Label Content="Project Phase:" Grid.Row="13"/>
<TextBox Grid.Row="13" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].APINumber}"/>
<Label Content="Unique ID:" Grid.Row="14"/>
<TextBox Grid.Row="14" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].UniqueID}"/>
<Label Content="Operational Field:" Grid.Row="15"/>
<TextBox Grid.Row="15" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].OperationalField}"/>
<Label Content="Facility Type:" Grid.Row="16"/>
<TextBox Grid.Row="16" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].FacilityType}"/>
<Label Content="Project Number:" Grid.Row="17"/>
<TextBox Grid.Row="17" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].ProjectNumber}"/>
<Label Content="Project Phase:" Grid.Row="18"/>
<TextBox Grid.Row="18" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].ProjectPhase}"/>
<Label Content="Report Number:" Grid.Row="19"/>
<TextBox Grid.Row="19" Grid.Column="1" Height="20" Text="{Binding ListFacilities[0].ReportNumber}"/>
</Grid>
</DataTemplate>
<DataTemplate x:Key="ContainmentTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<Label Content="Name:"/>
<TextBox Grid.Column="1" Height="20" Text="{Binding ListContainments[0].Name}"/>
<Label Content="Height:" Grid.Row="1"/>
<TextBox Grid.Row="1" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].Height}"/>
<Label Content="Diameter:" Grid.Row="2"/>
<TextBox Grid.Row="2" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].TankPadHeight}"/>
<Label Content="County:" Grid.Row="3"/>
<TextBox Grid.Row="3" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].TankPadWidth}"/>
<Label Content="Inner Length:" Grid.Row="4"/>
<TextBox Grid.Row="4" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].TankPadLength}"/>
<Label Content="Inner Width:" Grid.Row="5"/>
<TextBox Grid.Row="5" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].InnerLength}"/>
<Label Content="Top Length:" Grid.Row="6"/>
<TextBox Grid.Row="6" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].InnerWidth}"/>
<Label Content="Top Width:" Grid.Row="7"/>
<TextBox Grid.Row="7" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].TopLength}"/>
<Label Content="Construction:" Grid.Row="8"/>
<TextBox Grid.Row="8" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].TopWidth}"/>
<Label Content="Fill Materials:" Grid.Row="9"/>
<TextBox Grid.Row="9" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].Construction}"/>
<Label Content="Fill Material Height (Top):" Grid.Row="10"/>
<TextBox Grid.Row="10" Grid.Column="1" Height="20" Text="{Binding ListContainments[0].Diameter}"/>
</Grid>
</DataTemplate>
<DataTemplate x:Key="TanksTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<Label Content="Name:"/>
<TextBox Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Name}"/>
<Label Content="Height:" Grid.Row="1"/>
<TextBox Grid.Row="1" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Height}"/>
<Label Content="Diameter:" Grid.Row="2"/>
<TextBox Grid.Row="2" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Diameter}"/>
<Label Content="Is in Service:" Grid.Row="3"/>
<TextBox Grid.Row="3" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].IsInService}"/>
<Label Content="Is on Pad:" Grid.Row="4"/>
<CheckBox Grid.Row="4" Grid.Column="1" Height="20" IsChecked="{Binding ListTanks[0].IsOnPad}"/>
<Label Content="Contents:" Grid.Row="5"/>
<TextBox Grid.Row="5" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Contents}"/>
<Label Content="Year Constructed:" Grid.Row="6"/>
<TextBox Grid.Row="6" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].YearConstructed}"/>
<Label Content="Material:" Grid.Row="7"/>
<TextBox Grid.Row="7" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Material}"/>
<Label Content="Is Portable:" Grid.Row="8"/>
<CheckBox Grid.Row="8" Grid.Column="1" Height="20" IsChecked="{Binding ListTanks[0].IsPortable}"/>
<Label Content="Is Isolated:" Grid.Row="9"/>
<CheckBox Grid.Row="9" Grid.Column="1" Height="20" IsChecked="{Binding ListTanks[0].IsIsolated}"/>
<Label Content="Quantity:" Grid.Row="10"/>
<TextBox Grid.Row="10" Grid.Column="1" Height="20" Text="{Binding ListTanks[0].Quantity}"/>
<Label Content="Orientation:" Grid.Row="11"/>
</Grid>
</DataTemplate>
</Window.Resources>
<Grid Margin="5" Height="Auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<TreeView Name="trvFacility" ItemsSource="{Binding MenuItems}" VirtualizingStackPanel.IsVirtualizing="True" Padding="10" Margin="5" Width="220">
<i:Interaction.Behaviors>
<local:BindableSelectedItemBehavior SelectedItem="{Binding SelectedItem,Mode=TwoWay}"/>
</i:Interaction.Behaviors>
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}" DataType="{x:Type entities:MenuItemCust}">
<TextBlock Text="{Binding Name}"/>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
<ScrollViewer Grid.Row="0" Grid.Column="1" Margin="5" VerticalScrollBarVisibility="Visible">
DataTemplate here
</ScrollViewer>
<Button Content="Save" Grid.Row="1" Grid.ColumnSpan="2" Grid.Column="0" Width="60" Height="25" Margin="0,0,5,0" HorizontalAlignment="Right"/>
</Grid>
MyWindowViewModel.cs
public class VisioFacilityExportViewModel : INotifyPropertyChanged
{
public VisioFacilityExportViewModel()
{
_lstFacilities = new ObservableCollection<Facility>(DatabaseHandler.GetFacilities().Where(f => f.FacilityID == 2015012314001933));
_lstContainments = _lstFacilities[0].Containment;
_lstTanks = _lstContainments[0].Tanks;
List<MenuItemCust> lstRoot = new List<MenuItemCust>();
List<MenuItemCust> lstContainment = new List<MenuItemCust>();
List<MenuItemCust> lstTanks = new List<MenuItemCust>();
MenuItems = new List<MenuItemCust>();
foreach (var f in _lstFacilities)
{
foreach (var c in f.Containment)
{
lstTanks.AddRange(c.Tanks.Select(t => new MenuItemCust { Name = t.Name, Info = "Tanks"}));
lstContainment.Add(new MenuItemCust { Name = c.Name, Children = lstTanks, Info = "Containment" });
}
lstRoot.Add(new MenuItemCust { Name = "Containment", Children = lstContainment, Info = "Facility"});
MenuItems.Add(new MenuItemCust { Name = "Facility", Children = lstRoot });
}
}
private ObservableCollection<Tank> _lstTanks;
public ObservableCollection<Tank> ListTanks
{
get { return _lstTanks; }
set
{
_lstTanks = value;
NotifyPropertyChanged("ListTanks");
}
}
private ObservableCollection<Containment> _lstContainments;
public ObservableCollection<Containment> ListContainments
{
get { return _lstContainments; }
set
{
_lstContainments = value;
NotifyPropertyChanged("ListContainments");
}
}
private ObservableCollection<Facility> _lstFacilities;
public ObservableCollection<Facility> ListFacilities
{
get { return _lstFacilities; }
set
{
_lstFacilities = value;
NotifyPropertyChanged("ListFacilities");
}
}
private List<MenuItemCust> _menuItems;
public List<MenuItemCust> MenuItems
{
get { return _menuItems; }
set
{
_menuItems = value;
NotifyPropertyChanged("MenuItems");
}
}
private static object _selectedItem = null;
public static object SelectedItem
{
get { return _selectedItem; }
private set
{
if (_selectedItem != value)
{
_selectedItem = value;
OnSelectedItemChanged();
}
}
}
public static void OnSelectedItemChanged()
{
var item = (MenuItemCust) SelectedItem;
if (item.Name == "Facility")
{
}
else if (item.Info == "Containment")
{
}
else if (item.Info == "Tanks")
{
}
}
#region iNotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
#endregion
}
答案 0 :(得分：1)
我认为你想要做的是在UserControl中显示信息，其中包含一个带有不同控件的网格，如textblock和textbox。 因此，您将创建一个名为FacilityView和FacilityViewModel的新UserControl，并且FacilityView将包含一个带有Facility Ojbect属性的网格 首先，我将在MyWindowViewModel中创建一个名为
的属性private Facility currentFacility;
public Facility CurrentFacility
{
get{return currentFacility;}
set{ currentFacility = value ;
notifyPropertyChange("CurrentFacility")
}
在您的MainWindowsView（xaml）
中<DataTemplate DataType="{x:Type localAdder:FacilityViewModel}">
<localAdder:FacilityView />
</DataTemplate>
<UserControl Grid.Row="1" Grid.Column="2"
Content="{Binding CurrentFacility,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,NotifyOnSourceUpdated=True}">
</UserControl>
在你的SelectedItem中你会
if (selectedItem is Facility)
{
CurrentFacility = new FacilityViewModel(selectedItem as Facility);
}
对于不好的缩进，我不会使用这个代码。
EDIT2：
好的，你有2个选择，首先你可以创建一个实现INotifyPropertyChanged的BaseViewModel。
FacilityViewModel：BaseViewModel
TankViewModel：BaseViewModel
ContainmentViewModel：BaseViewModel
这样您就可以将CurrentFacilityViewModel更改为CurrentBaseViewModel
private BaseViewModel currentBaseXXX;
public BaseViewModel CurrentBaseXXX
{
get{return currentBaseXXX;}
set{ currentBaseXXX= value ;
notifyPropertyChange("CurrentBaseXXX")
}
在你的SelectedItem中你会
if (selectedItem is Facility)
{
CurrentBaseXXX= new FacilityViewModel(selectedItem as Facility);
}
if (selectedItem is Tank)
{
CurrentBaseXXX= new TankViewModel(selectedItem as Tank);
}
if (selectedItem is Containers)
{
CurrentBaseXXX= new ContainersViewModel(selectedItem as Containers);
}
选项2
你将有3个当前的
CurrentFacilityVM
CurrentTankVM
CurrentContainerVM
在你的SelectedItem中你会
CurrentFacilityVM = null;
CurrentTankVM =null;
CurrentContainerVM =null;
if (selectedItem is Facility)
{
CurrentFacilityVM = new FacilityViewModel(selectedItem as Facility);
}
if (selectedItem is Tank)
{
CurrentTankVM = new TankViewModel(selectedItem as Tank);
}
if (selectedItem is Containers)
{
CurrentContainerVM = new ContainersViewModel(selectedItem as Containers);
}
答案 1 :(得分：0)
您可以根据类型动态加载数据模板。请参阅以下内容。您可以通过将SelectedItem的实例更改为Different类来切换模板。
<Window.Resources>
<DataTemplate DataType="{x:Type entities:Facility}">
<Grid>
<TextBlock Text="{Binding FacilityName}" />
</Grid>
</DataTemplate>
<DataTemplate DataType="{x:Type entities:Containment}">
<Grid>
<TextBlock Text="{Binding ContainmentName}"/>
</Grid>
</DataTemplate>
<DataTemplate DataType="{x:Type entities:Tank}">
<Grid>
<TextBlock Text="{Binding TankName}"></TextBlock>
</Grid>
</DataTemplate>
</Window.Resources>
<Grid Margin="5" Height="Auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<ScrollViewer Grid.Row="0" Grid.Column="1" Margin="5" VerticalScrollBarVisibility="Visible" DataContext="{Binding SelectedItem}">
<ContentControl Content="{Binding }"/>
</ScrollViewer>
<Button Content="Save" Grid.Row="1" Grid.ColumnSpan="2" Grid.Column="0" Width="60" Height="25" Margin="0,0,5,0" HorizontalAlignment="Right"/>
</Grid>
public partial class Download : Window
{
public Download()
{
InitializeComponent();
this.DataContext = new VisioFacilityExportViewModel();
}
}
public class VisioFacilityExportViewModel : INotifyPropertyChanged
{
public VisioFacilityExportViewModel()
{
//SelectedItem = new Facility() { FacilityName = "Facility" };
//SelectedItem = new Tank() { TankName = "Tank" };
SelectedItem = new Containment() { ContainmentName = "Containment" };
}
private object _selectedItem = null;
public object SelectedItem
{
get { return _selectedItem; }
private set
{
if (_selectedItem != value)
{
_selectedItem = value;
NotifyPropertyChanged("SelectedItem");
}
}
}
#region iNotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
#endregion
}
public class Tank
{
private string myVar;
public string TankName
{
get { return myVar; }
set { myVar = value; }
}
}
class Facility
{
private string myVar;
public string FacilityName
{
get { return myVar; }
set { myVar = value; }
}
}
class Containment
{
private string myVar;
public string ContainmentName
{
get { return myVar; }
set { myVar = value; }
}
}