Как показать количество всех прямых и косвенных дочерних элементов в WPF treeview
У меня есть один элемент управления древовидным представлением WPF, который показывает сведения о сотруднике в иерархическом порядке.Я хочу показать имя сотрудника и количество его прямых и косвенных репортеров(например , если сотрудник C отчитывается перед B, А B отчитывается перед A, то количество прямых и косвенных репортеров A будет равно 2)
Но я могу показать количество прямых репортеров(1), но не количество всех репортеров(2).
Я связал источник элементов из базы данных в виде списка(Root) :
Мой xamal:
<TreeView x:Name="tvMain" ItemsSource="{Binding Root}" BorderThickness="0">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal">
<Border BorderBrush="#02747474" Background="#02000000" HorizontalAlignment="Center" Margin="0,5,0,0" VerticalAlignment="Top" BorderThickness="1,1,1,1" x:Name="AvatarPhotoBorder">
<Border.BitmapEffect>
<DropShadowBitmapEffect ShadowDepth="7" Softness="0.75"/>
</Border.BitmapEffect>
<Image x:Name="imgPicture" Source="{Binding ImagePath}" Stretch="Uniform" VerticalAlignment="Top" Width="75" Height="60" HorizontalAlignment="Center" />
</Border>
<TextBlock VerticalAlignment="Center">
<TextBlock.Text>
<MultiBinding StringFormat=" {0} {1}">
<Binding Path="FirstName"/>
<Binding Path="LastName"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
<TextBlock Text=" [Direct and Indirect reportee:" Foreground="LightGray" />
<TextBlock Text="{Binding Count}" Foreground="Gray" />??
<---- <TextBlock Text="{Binding Children.Count}"/>---->this will give only direct reportee count
<TextBlock Text="]" Foreground="LightGray" />
<StackPanel.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected}" Value="true">
<Setter Property="StackPanel.Background" Value="LightBlue"/>
</DataTrigger>
</Style.Triggers>
</Style>
</StackPanel.Style>
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}" BasedOn="{StaticResource {x:Type TreeViewItem}}">
<Setter Property="IsExpanded" Value="True"/>
<Setter Property="IsSelected" Value="{Binding IsSelected}"/>
</Style>
</TreeView.ItemContainerStyle>
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectedItemChanged">
<i:InvokeCommandAction Command="{Binding SelectedCommand}"
CommandParameter="{Binding ElementName=tvMain, Path=SelectedItem}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</TreeView>
</StackPanel>
модель представления:
public class OrgElementViewModel : ViewModelBase
{
private int Id;
private string firstName;
private string lastName;
private string imagePath;
public int count;
private ObservableCollection<OrgElementViewModel> allchildren;
private ObservableCollection<OrgElementViewModel> children;
private bool isSelected;
public int Count
{
get { ;
if (allchildren == null) //not yet initialized
return GetAllChildren();
return count;
}
set { count = GetAllChildren();
OnPropertyChanged("Count");
}
}
private int GetAllChildren()
{
int dd = 2;
allchildren = new ObservableCollection<OrgElementViewModel>();
//get the list of children from Model
foreach (Node i in OrgChartManager.Instance().GetAllChildren(this.ID))
{
//allchildren.Add(new OrgElementViewModel(i));
dd = dd + 1;
}
return dd;
}
public int ID
{
get { return Id; }
set { Id = value; }
}
public string FirstName
{
get { return firstName; }
set { firstName = value; }
}
public string LastName
{
get { return lastName; }
set { lastName = value; }
}
public string ImagePath
{
get { return imagePath; }
set { imagePath = value; }
}
public bool IsSelected
{
get { return isSelected; }
set
{
isSelected = value;
OnPropertyChanged("IsSelected");
}
}
public ObservableCollection<OrgElementViewModel> Children
{
get
{
if (children == null) //not yet initialized
return GetChildren();
return children;
}
set
{
children = value;
OnPropertyChanged("Children");
}
}
internal OrgElementViewModel(Node i)
{
this.ID = i.Id;
this.FirstName = i.FirstName;
this.LastName = i.LastName;
this.ImagePath = Path.GetFullPath("Images/" + this.ID.ToString() + ".png");
this.Count = GetAllChildren();
}
internal void ShowChildrenLevel(int levelsShown)
{
if (levelsShown == -1) //show all levels
this.Children = GetChildren();
else if (levelsShown == 0) //don't show any more levels
this.Children = new ObservableCollection<OrgElementViewModel>(); //set as empty
else if (levelsShown > 0) //if a level is requested
{
this.Children = GetChildren();
foreach (OrgElementViewModel i in this.Children)
i.ShowChildrenLevel(levelsShown - 1); //decrement 1 for next level
}
}
private ObservableCollection<OrgElementViewModel> GetChildren()
{
int dd = 1;
children = new ObservableCollection<OrgElementViewModel>();
//get the list of children from Model
foreach (Node i in OrgChartManager.Instance().GetChildren(this.ID))
{
children.Add(new OrgElementViewModel(i));
}
return children;
}
}
Класс моделей:public class OrgChartManager
{
private static OrgChartManager self;
//orgchart stored in dictionary
private Dictionary<int, Node> list = new Dictionary<int, Node>();
PersonalDAL dd = new PersonalDAL();
private OrgChartManager()
{
DataTable my_datatable = new DataTable();
my_datatable = new PersonalDAL().loademp();
int ColumnCount = my_datatable.Columns.Count;
int i = 1;
foreach (DataRow dr in my_datatable.Rows)
{
Node node = new Node
{
Id = (int)dr["ID"],
FirstName = (string)dr["FirstName"],
LastName = (string)dr["LastName"],
ParentId = (int)dr["ParentId"]
};
list.Add(i, node);
i++;
}
}
internal static OrgChartManager Instance()
{
if (self == null)
self = new OrgChartManager();
return self;
}
//get the root
internal Node GetRoot()
{
return list[1]; //return the top root node
}
//get the directchildren of a node
internal IEnumerable<Node> GetChildren(int parentId)
{
return from a in list
where a.Value.ParentId == parentId
&& a.Value.Id != parentId //don't include the root, which has the same Id and ParentId
select a.Value;
}
// Recursion method to get all the childeren under purcular ID
internal IEnumerable<Node> GetAllChildren(int parentId)
{
var result = new List<Node>();
var employees = from a in list
where (a.Value.ParentId == parentId
&& a.Value.Id != parentId) //don't include the root, which has the same Id and ParentId
select a.Value;
foreach (var employee in employees)
{
result.Add(employee);
result.AddRange(GetAllChildren(parentId));
}
return result;
//return from a in list
// where a.Value.ParentId == parentId
// && a.Value.Id != parentId //don't include the root, which has the same Id and ParentId
// select a.Value;
}
}
Мой класс узлов: class Node
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public int ParentId { get; set; }
}
Что я уже пробовал:
Я просто хочу показать количество всех детей на каждом узле элемента(прямой и косвенный), пожалуйста, помогите мне .код, где я привет освещен ?? вот где я застрял