How to Bind TreeView to XML in CurrentItem in CollectionView

Question

I am having several issues trying to bind a treeview control to XML

Here is a sample of the XML I am tyring to load

<ChangeNode Description="" ChangeType="Change" Type="Settings">

     <ChangeDetails>

          <ChangeDetailNode Description="TopComment" OldValue="Top Comment" NewValue="Top"/>

          <ChangeDetailNode Description="BottomComment" OldValue="Bottom Comment" NewValue="Bottom"/>

     </ChangeDetails>

     <Children />

</ChangeNode>

 

Thsi information is contained in a field in the database and accessed through a prioperty of my model through the viewmodel.

Below is the xaml for my view

<UserControl x:Class="AuditReportingView"
       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
       mc:Ignorable="d" 
       d:DesignHeight="562" d:DesignWidth="880"
       xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase"
       xmlns:filter="clr-namespace:DataGridFilterLibrary;assembly=DataGridFilterLibrary">
  
  <UserControl.Resources>
    <DataTemplate DataType="ChangeNode">
      <StackPanel Margin="6" Orientation="Horizontal" >
        <TextBlock Text="{Binding XPath=@Type}" />
        <TextBlock Text="{Binding XPath=@ChangeType}" />
        <TextBlock Text="{Binding XPath=@Description}" />
      </StackPanel>
    </DataTemplate>

    <DataTemplate DataType="ChangeDatailNode">
      <StackPanel Margin="6" Orientation="Horizontal" >
        <TextBlock Text="{Binding XPath=@Description}" />
        <TextBlock Text="{Binding XPath=@OldValue}" />
        <TextBlock Text="{Binding XPath=@NewValue}" />
      </StackPanel>
    </DataTemplate>
    
    <HierarchicalDataTemplate DataType="ChangeDetails" ItemsSource="{Binding XPath=*}">
      <TextBlock Text="Change Information"/>
    </HierarchicalDataTemplate>

    <HierarchicalDataTemplate DataType="Children" ItemsSource="{Binding XPath=*}">
      <TextBlock Text="Details"/>
    </HierarchicalDataTemplate>
    
  </UserControl.Resources>

  <Grid Width="881" Height="559">
    <DataGrid 
           
      filter:DataGridExtensions.UseBackgroundWorkerForFiltering="True"
            
      filter:DataGridExtensions.IsClearButtonVisible="false" 
            
      filter:DataGridExtensions.IsFilterVisible="True" 
            
      ColumnHeaderStyle="{StaticResource {ComponentResourceKey 
		      TypeInTargetAssembly={x:Type filter:DataGridHeaderFilterControl}, 
		      ResourceId=DataGridHeaderFilterControlStyle}}"
            
      AutoGenerateColumns="False"
      DataContext="{Binding Path=Items}" 
      ItemsSource="{Binding}"
      Name="myGrid1" 
      IsSynchronizedWithCurrentItem="True" Margin="170,12,192,0" Height="272" VerticalAlignment="Top">

      <DataGrid.Columns>
        <DataGridTextColumn Header="Module" Binding="{Binding Path=ModuleID}" Width="*" />
        <DataGridTextColumn Header="Source" Binding="{Binding Path=Source}" Width="*" />
        <DataGridTextColumn Header="User" Binding="{Binding Path=UserName}" Width="*" />
        <DataGridTextColumn Header="Change Date" Binding="{Binding Path=DateChanged}" Width="2*" />
      </DataGrid.Columns>
    </DataGrid>
    <Button Content="Clear Filter" Command="{Binding Path=(filter:DataGridExtensions.ClearFilterCommand), ElementName=myGrid1}" Height="26" HorizontalAlignment="Left" Margin="710,16,0,0" Name="Button1" VerticalAlignment="Top" Width="112" />


    <TreeView Name="tv" Background="LightYellow" DataContext="{Binding Path=Items}" ItemsSource="{Binding ChangesXMLDataProvider}" Margin="35,290,489,12">
      
    </TreeView>
    <TextBlock Height="273" HorizontalAlignment="Left" DataContext="{Binding Path=Items}" Margin="414,290,0,0" Name="TextBlock1" Text="{Binding /Changes}" VerticalAlignment="Top" Width="373" />
  </Grid>
</UserControl>

I want the datagrid to be tied to the CollectionView and the treeview below to be tied to the ChangesXMLDataProvider property of the currentitem in the collectionview.  My datacontext for the view is the ViewModel so I tried to set the datacontext of the grid and the treeview and the textblock to properties of the current item.

My first problem is that when I change rows on my datagrid the current item does not change or if it does the textblock is not updating becuase the text that shows there does nto change.  The second issue I am having is no data shows up in the treeview so I do not knwo if my binding is incorrect or it has an issue with my templates for showing the data.

Any help woudl be greatly appreciated.

Here is the model

Partial Public Class AuditChange
  #Region "Primitive Properties"

  Public Overridable Property Id As Integer Implements EFPoco.Core.IEntity.ID

  Public Overridable Property ModuleID As String

  Public Overridable Property Source As String

  Public Overridable Property UserName As String

  Public Overridable Property DateChanged As Date

  Public Overridable Property Changes As String

  #End Region
End Class

Below is my ViewModel

<pre lang="x-vbnet">Imports System.Linq
Imports System
Imports System.Collections.Generic
Imports System.Collections.ObjectModel
Imports System.Collections.Specialized
Imports System.ComponentModel
Imports CashReceipts.EFPoco.Core
Imports System.Data.Objects
Imports System.Xml

''' <summary>
''' Represents a container of CustomerViewModel objects
''' that has support for staying synchronized with the
''' CustomerRepository. This class also provides information
''' related to multiple selected customers.
''' </summary>
Public Class AllAuditReportingChangesViewModel
  Inherits WorkspaceViewModel
#Region "Fields"

  Private ReadOnly _auditChangesRepository As AuditChangeRepository
  Private ReadOnly _WorkUnit As UnitOfWorkAuditReporting
  Private _filterCommand As RelayCommand

#End Region ' Fields

#Region "Constructor"

  Public Sub New()
    _WorkUnit = New UnitOfWorkAuditReporting()
    _auditChangesRepository = New AuditChangeRepository(_WorkUnit)
    Me.CreateAllAuditChanges()
  End Sub

  Public Sub New(ByVal auditChangesRepository As AuditChangeRepository, ByVal wrkUnit As UnitOfWorkAuditReporting)
    If auditChangesRepository Is Nothing Then
      Throw New ArgumentNullException("auditChangesRepository")
    End If

    If wrkUnit Is Nothing Then
      Throw New ArgumentNullException("wrkUnit")
    End If

    MyBase.DisplayName = "Audit Reporting"

    _auditChangesRepository = auditChangesRepository
    _WorkUnit = wrkUnit

    ' Populate the AllCustomers collection with CustomerViewModels.
    Me.CreateAllAuditChanges()
  End Sub

  Private Sub CreateAllAuditChanges()
    'Dim lstPayTypes As New List(Of PayTypeViewModel)(From p In _payTypeRepository.GetAll() Select New PayTypeViewModel(p, _payTypeRepository, _WorkUnit))

    'For Each cvm As PayTypeViewModel In lstPayTypes
    '  AddHandler cvm.PropertyChanged, AddressOf OnPayTypeViewModelPropertyChanged
    'Next cvm

    'Me.AllPayTypes = New ObservableCollection(Of PayTypeViewModel)(lstPayTypes)

    Me.AllAuditChanges = New ObservableCollection(Of AuditChange)(_auditChangesRepository.GetAll())
    AddHandler Me.AllAuditChanges.CollectionChanged, AddressOf OnCollectionChanged
  End Sub

#End Region ' Constructor

#Region "Public Interface"

  Private privateAllAuditChanges As ObservableCollection(Of AuditChange)
  Public Property AllAuditChanges() As ObservableCollection(Of AuditChange)
    Get
      Return privateAllAuditChanges
    End Get
    Private Set(ByVal value As ObservableCollection(Of AuditChange))
      privateAllAuditChanges = value
    End Set
  End Property

  Private _items As CollectionViewSource = Nothing
  Public ReadOnly Property Items As ICollectionView
    Get
      If Items Is Nothing Then
        _items = New CollectionViewSource()
        _items.Source = AllAuditChanges
        AddHandler _items.View.CurrentChanging, AddressOf CreateXMLProvider
      End If
      Return _items.View
    End Get
  End Property

  Private Sub CreateXMLProvider(ByVal sender As Object, ByVal e As System.ComponentModel.CurrentChangingEventArgs)
    Dim d As New XmlDocument()
    d.LoadXml(_items.View.CurrentItem.Changes)
    _ChangesXMLDataProvider.Document = d
  End Sub

  Private _ChangesXMLDataProvider As New XmlDataProvider
  Public Property ChangesXMLDataProvider() As XmlDataProvider
    Get
      Return _ChangesXMLDataProvider
    End Get
    Set(ByVal value As XmlDataProvider)
      _ChangesXMLDataProvider = value
      OnPropertyChanged("ChangesXMLDataProvider")
    End Set
  End Property


#End Region ' Public Interface

#Region " Base Class Overrides"

  Protected Overrides Sub OnDispose()
    Me.AllAuditChanges.Clear()

    RemoveHandler Me.AllAuditChanges.CollectionChanged, AddressOf OnCollectionChanged
  End Sub

#End Region ' Base Class Overrides

#Region "Event Handling Methods"
  Private Sub OnCollectionChanged(ByVal sender As Object, ByVal e As NotifyCollectionChangedEventArgs)
    If e.Action = NotifyCollectionChangedAction.Add Then
      For Each custVM As AuditChange In e.NewItems
        _auditChangesRepository.Add(custVM)
      Next
    ElseIf e.Action = NotifyCollectionChangedAction.Remove Then
      For Each custVM As AuditChange In e.OldItems
        _auditChangesRepository.Delete(custVM)
      Next
    End If
  End Sub
#End Region ' Event Handling Methods
End Class

Answer 1

Hi swade30,

1) If you want to set the same DataContext property to DataGrid, TreeView, TextBlock, I think there is no need:

 DataContext="{Binding Path=Items}"

you could just set the DataContext property to the Root element, and then children element will share this DataContext, for example, you could set the DataContext to the Grid, like:

Grid.DataContext = Items.

2) Text="{Binding /Changes}" what is the "/Changes", if it is a property include in DataContext?

3) When you run application, you could check the "OutPut" window, and check if there is Binding exception, I guess your binding part will throw expcetion.

4) you could base on the exception to fix your issue,  there is a way to debug your Binding, you could refer to,

http://social.msdn.microsoft.com/Forums/en-NZ/wpf/thread/549eeb7c-8df7-4a6c-a264-91f06ca75293

http://bea.stollnitz.com/blog/?p=52

 

Best regards,

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 2

Thanks for the reply. 

1) If I change the line DataContext="{Binding Path=Items}" to DataContext=Items I no longer see the items in the grid.

2)  From what I had read the / is supposed to tell the program I am looing at the current item of the collectionview that is my datacontext.  Items is a collectionview so I wanted to get the Changes of the currently selected record in the grid.  Changes is a property that holds an XML document containing all the information about changes made to the record.

3) I did have a few errors and I have tweaked the following code to resolve it.

Original

 <TreeView Name="tv" Background="LightYellow" DataContext="{Binding Path=Items}" ItemsSource="{Binding ChangesXMLDataProvider}" Margin="35,290,489,12">

New

 <TreeView Name="tv" Background="LightYellow" ItemsSource="{Binding ChangesXMLDataProvider}" Margin="35,290,489,12">

It was looking in the CollectionView for the ChangesXMLDataProvider but this property was actually in the ViewModel so I removed the DataContext setting allowing the TreeView to take the datacontext of the usercontrol which is the ViewModel.  This resolved the only binding error I had but the treeview still shows no data in it.

So unfortuanately I still have the same issues.  the TreeView does nto show any data and the textbox, wehich I just threw in for testing purposes, shows the XML for the first record but if I select another record in the grid it does not update to show the correct information.

 

 

 

Answer 3

OK I changed things a bit.  I added a viewmodel for an individual AuditChange record and now in my AllAuditChangesViewModel I expose a CollectionView of the individual ViewModels with a property whic returns an XMLDataProvider.  The new ViewModel is shown below

Imports System
Imports System.ComponentModel
Imports System.Windows.Input
Imports CashReceipts.EFPoco.Core
Imports System.Data.Objects
Imports System.Xml

''' <summary>
''' A UI-friendly wrapper for a Customer object.
''' </summary>
Public Class AuditReportingChangesViewModel
  Inherits WorkspaceViewModel
  Implements IDataErrorInfo
#Region "Fields"

  Private ReadOnly _WorkUnit As UnitOfWorkAuditReporting
  Private ReadOnly _auditChange As AuditChange
  Private ReadOnly _auditChangeRepository As AuditChangeRepository
  Private _isSelected As Boolean
  Private _saveCommand As RelayCommand
#End Region ' Fields

#Region "Constructor"

  Public Sub New()
    _WorkUnit = New UnitOfWorkAuditReporting()
    _auditChangeRepository = New AuditChangeRepository(_WorkUnit)
    If _auditChangeRepository.Any Then
      _auditChange = _auditChangeRepository.First()
    Else
      _auditChange = AuditChange.CreateNew
    End If
  End Sub

  Public Sub New(ByVal auditChange As AuditChange, ByVal auditChangeRepository As AuditChangeRepository, ByVal wrkUnit As UnitOfWorkAuditReporting)
    If auditChange Is Nothing Then
      Throw New ArgumentNullException("auditChange")
    End If

    If auditChangeRepository Is Nothing Then
      Throw New ArgumentNullException("auditChangeRepository")
    End If

    If wrkUnit Is Nothing Then
      Throw New ArgumentNullException("wrkUnit")
    End If

    _auditChange = auditChange
    _auditChangeRepository = auditChangeRepository
    _WorkUnit = wrkUnit
  End Sub

#End Region ' Constructor

#Region "Customer Properties"

  Public Property ID As Integer
    Get
      Return _auditChange.Id
    End Get
    Set(ByVal value As Integer)
      If value = _auditChange.Id Then
        Return
      End If

      _auditChange.Id = value

      MyBase.OnPropertyChanged("ID")
    End Set
  End Property

  Public Property ModuleID() As String
    Get
      Return _auditChange.ModuleID
    End Get
    Set(ByVal value As String)
      If value = _auditChange.ModuleID Then
        Return
      End If

      _auditChange.ModuleID = value

      MyBase.OnPropertyChanged("ModuleID")
    End Set
  End Property

  Public Property Source() As String
    Get
      Return _auditChange.Source
    End Get
    Set(ByVal value As String)
      If value = _auditChange.Source Then
        Return
      End If

      _auditChange.Source = value

      MyBase.OnPropertyChanged("Source")
    End Set
  End Property

  Public Property UserName() As String
    Get
      Return _auditChange.UserName
    End Get
    Set(ByVal value As String)
      If value = _auditChange.UserName Then
        Return
      End If

      _auditChange.UserName = value

      MyBase.OnPropertyChanged("UserName")
    End Set
  End Property

  Public Property DateChanged() As DateTime
    Get
      Return _auditChange.DateChanged
    End Get
    Set(ByVal value As DateTime)
      If value = _auditChange.DateChanged Then
        Return
      End If

      _auditChange.DateChanged = value

      MyBase.OnPropertyChanged("DateChanged")
    End Set
  End Property

  Public Property Changes() As String
    Get
      Return _auditChange.Changes
    End Get
    Set(ByVal value As String)
      If value = _auditChange.Changes Then
        Return
      End If

      _auditChange.Changes = value

      MyBase.OnPropertyChanged("Changes")
    End Set
  End Property

  Private _ChangesXMLDataProvider As New XmlDataProvider
  Public ReadOnly Property ChangesXMLDataProvider() As XmlDataProvider
    Get
      Dim d As New XmlDocument()
      d.LoadXml(_auditChange.Changes)
      _ChangesXMLDataProvider.Document = d
      Return _ChangesXMLDataProvider
    End Get
  End Property
#End Region ' Customer Properties

#Region "Presentation Properties"
  Public Overrides Property DisplayName() As String
    Get
      Return "Audit Changes"
    End Get
    Protected Set(ByVal value As String)
      MyBase.DisplayName = value
      OnPropertyChanged("DisplayName")
    End Set
  End Property

  ''' <summary>
  ''' Returns a command that saves the customer.
  ''' </summary>
  Public ReadOnly Property SaveCommand() As ICommand
    Get
      If _saveCommand Is Nothing Then
        Dim saveAction As New Action(Of Object)(AddressOf Me.Save)
        _saveCommand = New RelayCommand(saveAction, Function(param) Me.CanSave)
      End If
      Return _saveCommand
    End Get
  End Property

#End Region ' Presentation Properties

#Region "Public Methods"

  ''' <summary>
  ''' Saves the customer to the repository. This method is invoked by the SaveCommand.
  ''' </summary>
  Public Sub Save()
    If (Not _auditChange.IsValid) Then
      Throw New InvalidOperationException("Unable to Save")
    End If

    If Me.IsNewPayType Then
      _auditChangeRepository.Add(_auditChange)
    End If

    _WorkUnit.Commit()
    MsgBox("Save Success!")
  End Sub

#End Region ' Public Methods

#Region "Private Helpers"

  ''' <summary>
  ''' Returns true if this customer was created by the user and it has not yet
  ''' been saved to the customer repository.
  ''' </summary>
  Private ReadOnly Property IsNewPayType() As Boolean
    Get
      Return _auditChange.Id <= 0
    End Get
  End Property

  ''' <summary>
  ''' Returns true if the customer is valid and can be saved.
  ''' </summary>
  Private ReadOnly Property CanSave() As Boolean
    Get
      Return _auditChange.IsValid
    End Get
  End Property

#End Region ' Private Helpers

#Region "IDataErrorInfo Members"

  Private ReadOnly Property IDataErrorInfo_Error() As String Implements IDataErrorInfo.Error
    Get
      Return (TryCast(_auditChange, IDataErrorInfo)).Error
    End Get
  End Property

  Public ReadOnly Property IDataErrorInfo_Item(ByVal propertyName As String) As String Implements IDataErrorInfo.Item
    Get
      Dim [error] As String = Nothing

      [error] = (TryCast(_auditChange, IDataErrorInfo))(propertyName)

      ' Dirty the commands registered with CommandManager,
      ' such as our Save command, so that they are queried
      ' to see if they can execute now.
      CommandManager.InvalidateRequerySuggested()

      Return [error]
    End Get
  End Property
#End Region ' IDataErrorInfo Members
End Class

Below I show the new AllAuditChangesViewModel

Imports System.Linq
Imports System
Imports System.Collections.Generic
Imports System.Collections.ObjectModel
Imports System.Collections.Specialized
Imports System.ComponentModel
Imports CashReceipts.EFPoco.Core
Imports System.Data.Objects
Imports System.Xml

''' <summary>
''' Represents a container of CustomerViewModel objects
''' that has support for staying synchronized with the
''' CustomerRepository. This class also provides information
''' related to multiple selected customers.
''' </summary>
Public Class AllAuditReportingChangesViewModel
  Inherits WorkspaceViewModel
#Region "Fields"

  Private ReadOnly _auditChangesRepository As AuditChangeRepository
  Private ReadOnly _WorkUnit As UnitOfWorkAuditReporting
  Private _filterCommand As RelayCommand

#End Region ' Fields

#Region "Constructor"

  Public Sub New()
    _WorkUnit = New UnitOfWorkAuditReporting()
    _auditChangesRepository = New AuditChangeRepository(_WorkUnit)
    Me.CreateAllAuditChanges()
  End Sub

  Public Sub New(ByVal auditChangesRepository As AuditChangeRepository, ByVal wrkUnit As UnitOfWorkAuditReporting)
    If auditChangesRepository Is Nothing Then
      Throw New ArgumentNullException("auditChangesRepository")
    End If

    If wrkUnit Is Nothing Then
      Throw New ArgumentNullException("wrkUnit")
    End If

    MyBase.DisplayName = "Audit Reporting"

    _auditChangesRepository = auditChangesRepository
    _WorkUnit = wrkUnit

    ' Populate the AllCustomers collection with CustomerViewModels.
    Me.CreateAllAuditChanges()
  End Sub

  Private Sub CreateAllAuditChanges()
    Dim all As List(Of AuditReportingChangesViewModel) = ( _
     From cust In _auditChangesRepository.GetAll() _
     Select New AuditReportingChangesViewModel(cust, _auditChangesRepository, _WorkUnit)).ToList()

    For Each cvm As AuditReportingChangesViewModel In all
      AddHandler cvm.PropertyChanged, AddressOf OnEmployeeViewModelPropertyChanged
    Next cvm

    Me.AllAuditChanges = New ObservableCollection(Of AuditReportingChangesViewModel)(all)
    AddHandler Me.AllAuditChanges.CollectionChanged, AddressOf OnCollectionChanged
  End Sub
#End Region ' Constructor

#Region "Public Interface"

  Private privateAllAuditChanges As ObservableCollection(Of AuditReportingChangesViewModel)
  Public Property AllAuditChanges() As ObservableCollection(Of AuditReportingChangesViewModel)
    Get
      Return privateAllAuditChanges
    End Get
    Private Set(ByVal value As ObservableCollection(Of AuditReportingChangesViewModel))
      privateAllAuditChanges = value
    End Set
  End Property

  Private _items As CollectionViewSource = Nothing
  Public ReadOnly Property Items As ICollectionView
    Get
      If Items Is Nothing Then
        _items = New CollectionViewSource()
        _items.Source = AllAuditChanges
      End If
      Return _items.View
    End Get
  End Property
#End Region ' Public Interface

#Region " Base Class Overrides"

  Protected Overrides Sub OnDispose()
    Me.AllAuditChanges.Clear()

    RemoveHandler Me.AllAuditChanges.CollectionChanged, AddressOf OnCollectionChanged
  End Sub

#End Region ' Base Class Overrides

#Region "Event Handling Methods"
  Private Sub OnCollectionChanged(ByVal sender As Object, ByVal e As NotifyCollectionChangedEventArgs)
    If e.NewItems IsNot Nothing AndAlso e.NewItems.Count <> 0 Then
      For Each empVM As AuditReportingChangesViewModel In e.NewItems
        AddHandler empVM.PropertyChanged, AddressOf OnEmployeeViewModelPropertyChanged
      Next empVM
    End If

    If e.OldItems IsNot Nothing AndAlso e.OldItems.Count <> 0 Then
      For Each empVM As AuditReportingChangesViewModel In e.OldItems
        RemoveHandler empVM.PropertyChanged, AddressOf OnEmployeeViewModelPropertyChanged
      Next empVM
    End If
  End Sub

  Private Sub OnEmployeeViewModelPropertyChanged(ByVal sender As Object, ByVal e As PropertyChangedEventArgs)
    Dim IsSelected As String = "IsSelected"

    ' Make sure that the property name we're referencing is valid.
    ' This is a debugging technique, and does not execute in a Release build.
    TryCast(sender, AuditReportingChangesViewModel).VerifyPropertyName(IsSelected)

    ' When a customer is selected or unselected, we must let the
    ' world know that the TotalSelectedSales property has changed,
    ' so that it will be queried again for a new value.
    If e.PropertyName = IsSelected Then
      Me.OnPropertyChanged("TotalAnnualSalary")
    End If
  End Sub

  Private Sub OnEmployeeAddedToRepository(ByVal sender As Object, ByVal e As AuditChangeAddedEventArgs)
    Dim viewModel = New AuditReportingChangesViewModel(e.NewAuditChange, _auditChangesRepository, _WorkUnit)
    Me.AllAuditChanges.Add(viewModel)
  End Sub
#End Region ' Event Handling Methods
End Class

Below is the changes I made to xaml on the screen to try to show info on the TreeView cointrol

<UserControl x:Class="AuditReportingView"
       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
       mc:Ignorable="d" 
       d:DesignHeight="562" d:DesignWidth="880"
       xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase"
       xmlns:filter="clr-namespace:DataGridFilterLibrary;assembly=DataGridFilterLibrary">
  
  <!--<UserControl.Resources>
    <DataTemplate DataType="ChangeNode">
      <StackPanel Margin="6" Orientation="Horizontal" >
        <TextBlock Text="{Binding XPath=@Type}" />
        <TextBlock Text="{Binding XPath=@ChangeType}" />
        <TextBlock Text="{Binding XPath=@Description}" />
      </StackPanel>
    </DataTemplate>

    <DataTemplate DataType="ChangeDatailNode">
      <StackPanel Margin="6" Orientation="Horizontal" >
        <TextBlock Text="{Binding XPath=@Description}" />
        <TextBlock Text="{Binding XPath=@OldValue}" />
        <TextBlock Text="{Binding XPath=@NewValue}" />
      </StackPanel>
    </DataTemplate>
    
    <HierarchicalDataTemplate DataType="ChangeDetails" ItemsSource="{Binding XPath=*}">
      <TextBlock Text="Change Information"/>
    </HierarchicalDataTemplate>

    <HierarchicalDataTemplate DataType="Children" ItemsSource="{Binding XPath=*}">
      <TextBlock Text="Details"/>
    </HierarchicalDataTemplate>
    
  </UserControl.Resources>-->

  <Grid Width="881" Height="559">
    <DataGrid 
           
      filter:DataGridExtensions.UseBackgroundWorkerForFiltering="True"
            
      filter:DataGridExtensions.IsClearButtonVisible="false" 
            
      filter:DataGridExtensions.IsFilterVisible="True" 
            
      ColumnHeaderStyle="{StaticResource {ComponentResourceKey 
		      TypeInTargetAssembly={x:Type filter:DataGridHeaderFilterControl}, 
		      ResourceId=DataGridHeaderFilterControlStyle}}"
            
      AutoGenerateColumns="False"
      DataContext="{Binding Path=Items}" 
      ItemsSource="{Binding}"
      Name="myGrid1" 
      IsSynchronizedWithCurrentItem="True" Margin="170,12,192,0" Height="272" VerticalAlignment="Top">

      <DataGrid.Columns>
        <DataGridTextColumn Header="Module" Binding="{Binding Path=ModuleID}" Width="*" />
        <DataGridTextColumn Header="Source" Binding="{Binding Path=Source}" Width="*" />
        <DataGridTextColumn Header="User" Binding="{Binding Path=UserName}" Width="*" />
        <DataGridTextColumn Header="Change Date" Binding="{Binding Path=DateChanged}" Width="2*" />
      </DataGrid.Columns>
    </DataGrid>
    <Button Content="Clear Filter" Command="{Binding Path=(filter:DataGridExtensions.ClearFilterCommand), ElementName=myGrid1}" Height="26" HorizontalAlignment="Left" Margin="710,16,0,0" Name="Button1" VerticalAlignment="Top" Width="112" />


    <TreeView Name="tv" Background="LightYellow" DataContext ="{Binding Path=Items}" ItemsSource="{Binding /Changes}" Margin="35,290,489,12">
      
    </TreeView>
    <TextBlock Height="273" HorizontalAlignment="Left" DataContext="{Binding Path=Items}" Margin="414,290,0,0" Name="TextBlock1" Text="{Binding /Changes}" VerticalAlignment="Top" Width="373" />
  </Grid>
</UserControl>

For testing purposes I changed the databinding of the TreeView to be the Changes property and I commented otu my data templates.  The treeview then showed me data.  This means to me that either the binding to the xmldataprovider is incorrect or the datatemplates are incorrect and 1 of these things is causing me issues with showing the data. 

I am still having the issue where if I move from item to item in the grid I can see my current item of the collectionview changes but the controls tied to properties of the current item do not seem to refresh.

Any help would be greatly appreciated.

 

 

 

 

 

 

Answer 4

OK I fixed the currentItem issue by changing my datacontext settings.  I took the settings off the individual controls and put the datacontext on the parent grid and now the current item changes correctly and the controls refresh.  Now my only issue is not being able to see data in the TreeView control.  I coudl see the data change when I changed what its ItemSource was so it is bound correctly there is either an issue with my templates or a problem with the XMLDataProvider

Answer 5

Hi swad30,

How about your issue, if your issue persists, could you tell me your main concern now?

 

Best regards,

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.