I have a DataGrid and fill it with a DataTable.
dgMitarbeiter.ItemsSource = mainController.loadDataTableMitarbeiter().DefaultView;
this is the function:
public DataTable loadDataTableMitarbeiter()
{
loadMitarbeiterList();
dtMitarbeiter.Clear();
foreach (Mitarbeiter mitarbeiter in mitarbeiterList)
{
drMitarbeiter = dtMitarbeiter.NewRow();
drMitarbeiter["ID"] = mitarbeiter.ID;
drMitarbeiter["Vorname"] = mitarbeiter.vorname;
drMitarbeiter["Nachname"] = mitarbeiter.nachname;
drMitarbeiter["Kostenstelle"] = mitarbeiter.kostenstelle.id;
drMitarbeiter["Größe Hose"] = mitarbeiter.gr_hose;
drMitarbeiter["Größe Oberteil"] = mitarbeiter.gr_oberteil;
drMitarbeiter["Gröse Schuhe"] = mitarbeiter.gr_schuhe;
drMitarbeiter["Ferial"] = mitarbeiter.ferial;
drMitarbeiter["Werk"] = mitarbeiter.werk;
drMitarbeiter["Datum"] = mitarbeiter.creationDate.ToString("dd.MM.yyyy");
dtMitarbeiter.Rows.Add(drMitarbeiter);
}
return dtMitarbeiter;
}
The Xaml:
<DataGrid x:Name="dgMitarbeiter" AlternatingRowBackground="Gainsboro" AlternationCount="2" ColumnWidth="*" HorizontalAlignment="Left" SelectedItem="{Binding SelectedItem}" Margin="10,22,0,0" VerticalAlignment="Top" Height="357" Width="731" CanUserAddRows="False" CanUserDeleteRows="False" RowEditEnding="dgMitarbeiter_RowEditEnding" Background="White" HeadersVisibility="Column"/>
I need a ComboBox for the column "Kostenstelle" but have no idea how to achieve this. Any ideas?
My answer implements an ObservableCollection. And adds this as a databinding to the ComboBox
You need a new class:
public class Kostenstellen: ObservableCollection<Kostenstelle>
{
}
And a fill Method with the following lines of code:
var kostenstellen = new Kostenstellen();
foreach mitarbeiter in mitarbeiterList
{
kostenstellen.Add(mitarbeiter.kostenstelle);
}
var cvsCombobox = new CollectionViewSource() { Source = this.operationList };
this.myCombobox.SetBinding(ItemsControl.ItemsSourceProperty, new Binding() { Source = cvsCombobox });
Now there will be only "(Kostenstelle)" as a string in the Combobox.
So you need to override the ToString() method of your Kostenstelle class
public partial class Kostenstelle
{
public override string ToString()
{
return this.ID.ToString();
}
}
HINT:
Use english variable and class names next time :)
You need to define a DataGridComboBoxColumn in your DataGrid columns, you can then bind the ItemsSource to wherever your combo box's options are located.
See here.
You can do a lot in your xaml file :) For myself I used this one lately...
In the xaml file you can now define the placement of the combobox on your page.
you can set the content by code later.
<GridView
x:Name="itemGridView"
AutomationProperties.AutomationId="ItemGridView"
AutomationProperties.Name="Items In Group"
TabIndex="1"
Grid.RowSpan="2"
Padding="120,126,120,50"
ItemsSource="{Binding}"
SelectionMode="None"
IsSwipeEnabled="false"
IsItemClickEnabled="True"
ItemClick="ItemView_ItemClick"
>
<GridView.ItemTemplate >
<DataTemplate >
<Grid Height="150" Width="480" Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="1" VerticalAlignment="Top" Margin="10,10,0,0" >
<TextBlock Text="{Binding title}" Style="{StaticResource TitleTextBlockStyle}" TextWrapping="NoWrap" FontSize="25"/>
<Line/>
<TextBlock Text="{Binding subtitle}" Style="{StaticResource CaptionTextBlockStyle}" TextWrapping="NoWrap" FontSize="20" Margin="0,10,0,0" />
<Line/>
<TextBlock Text="{Binding description}" Style="{StaticResource BodyTextBlockStyle}" MaxHeight="60" FontSize="15" Margin="0,10,0,0"/>
<Button Tag="{Binding title}" Click="ItemButtonClicked" Content="Details" FontSize="15" Margin="0,10,0,0"/>
</StackPanel>
</Grid>
</DataTemplate>
</GridView.ItemTemplate>
<GridView.ItemContainerStyle>
<Style TargetType="FrameworkElement" >
<Setter Property="Margin" Value="52,0,0,2"/>
</Style>
</GridView.ItemContainerStyle>
</GridView>
Related
I use an observableCollecion in my VM. This Collection is bind into my view in a ListView. In my items I try to get the element who create this item. Add it in my commandParameter and do the thing.
Here's my VM :
public RelayCommand<SelectionCommandParameter> CmdRemoveFromQuiz { get; set; }
public ObservableCollection<Question> SelectedQuiz
{
get { return _selectedQuiz; }
set
{
_selectedQuiz = value;
RaisePropertyChanged("SelectedQuiz");
}
}
private void RemoveFromQuiz(SelectionCommandParameter selection)
{
if (selection.Parameter is Question)
{
ObservableCollection<Question> tempQuiz = SelectedQuiz;
Question _question = (Question)selection.Parameter;
tempQuiz.Remove(_question);
SelectedQuiz = tempQuiz;
}
}
The problem start with the RemoveBtn I start the command, and selection stay null I want to get the ObservableCollection<Question> object use in my ListViewitem
Now My View :
<userControls:CharmFlyout
x:Name="cfoQuizList"
x:Uid="QuizListCreatingPageFlyout"
Heading="Question Multiple"
HorizontalAlignment="Left"
Grid.Column="0"
Grid.RowSpan="2"
Style="{StaticResource stlAddRecipientFlyout}">
<tut:TutorialAwareListView x:Name="gvQuizItem"
ItemsSource="{Binding SelectedQuiz}"
IsItemClickEnabled="True"
CanReorderItems="True"
SelectionMode="None"
ManipulationMode="TranslateRailsX">
<ListView.ItemTemplate>
<DataTemplate x:Name="DTQuizItem">
<Grid HorizontalAlignment="Left" Width="{StaticResource RectangleTileWidth}" Height="{StaticResource RectangleTileHeight}"
Margin="0 0 0 0" Background="{StaticResource OrangeBackgroundThemeBrush}">
<Grid Grid.Column="1">
<Button x:Name="RemoveBtn" Content="X" HorizontalAlignment="Right" VerticalAlignment="Top" Width="40" Height="40"
BorderThickness="0" Command="{Binding DataContext.CmdRemoveFromQuiz, ElementName=gvQuizItem}" CommandParameter="{Binding Question}"/>
<maxCtrls:MaxAutoScrollingContentPresenter VerticalAlignment="Center"
ScrollingDuration="{Binding Name, Converter={StaticResource TextToTimeToReadShortFormatConverter}}"
ScrollingBeginTime="0:0:2">
<TextBlock Text="{Binding Name}" FontWeight="SemiBold"
Foreground="{StaticResource WhiteBackground}"
Margin="20,5,10,5" VerticalAlignment="Center" TextWrapping="Wrap"/>
</maxCtrls:MaxAutoScrollingContentPresenter>
</Grid>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</tut:TutorialAwareListView>
</userControls:CharmFlyout>
The TutorialAwareListView Work exactly like a ListView. I use it juste to point the element while the tutorial is running.
It's a Windows Store App !! I can't do all the thing we would like to.
You should change your SelectionMode="None" to Single or Multiply.
And make new ObservableCollection for selected items. You bind just ItemsSource="{Binding SelectedQuiz}". Bind SelectedItems="{...}"
I followed the tutorial on this page: http://modernography.wordpress.com/2014/04/26/jumplists-in-windows-phone-8-1/
I have a collectionviewsource:
// artistdata
public CollectionViewSource ArtistList
{
get
{
var data = App.musicdata.Artists;
var groups = data.ToAlphaGroups(x => x.name);
_ArtistList = new CollectionViewSource();
_ArtistList.Source = groups; //groups is the result of using my extension methods above
_ArtistList.IsSourceGrouped = true;
return _ArtistList;
}
}
Which I bind to my XAML:
<PivotItem x:Name="artists" Margin="10,0">
<SemanticZoom Style="{StaticResource AlphaJumpListStyle}">
<SemanticZoom.ZoomedInView>
<ListView Background="Transparent" ItemsSource="{Binding ArtistList.View}" Loaded="ListviewLoaded">
<ListView.GroupStyle>
<GroupStyle HeaderTemplate="{StaticResource AlphaGroupHeaderTemplate}" HeaderContainerStyle="{StaticResource JumpListListHeaderContainerStyle}" HidesIfEmpty="True" />
</ListView.GroupStyle>
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Grid.Column="1" Margin="10,5" Tapped="ArtistSelected">
<TextBlock FontFamily="Segoe WP" FontSize="22" Foreground="White" Text="{Binding name}" HorizontalAlignment="Left" VerticalAlignment="Top" Width="{Binding ActualWidth, ElementName=parentElementName}"/>
<TextBlock FontFamily="Segoe WP" FontWeight="Light" FontSize="17" Foreground="#7FFFFFFF" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,-5,0,0">
<Run Text="{Binding amountofalbums}"/>
<Run Text="albums"/>
</TextBlock>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</SemanticZoom.ZoomedInView>
<SemanticZoom.ZoomedOutView>
<GridView ItemsSource="{Binding ArtistList.View.CollectionGroups}" Style="{StaticResource AlphaJumpListPickerStyle}" />
</SemanticZoom.ZoomedOutView>
</SemanticZoom>
</PivotItem>
It all displays correctly, I can open and close the JumpList.
BUT, when I tap on a letter in the zoomedoutview, the zoomedinview doesn't jump to that letter. Instead, it stays where it was?
I can't find the cause for this problem. Maybe the problem is that the SementicZoom is inside a Pivot?
I think the issue is caused because ListView and GridView are obtaining different instances of CollectionView. As the example shows, you should cache the first created instance.
The code should be:
public CollectionViewSource ArtistList
{
get
{
if(_ArtistList == null)
{
var data = App.musicdata.Artists;
var groups = data.ToAlphaGroups(x => x.name);
_ArtistList = new CollectionViewSource();
_ArtistList.Source = groups; //groups is the result of using my extension methods above
_ArtistList.IsSourceGrouped = true;
}
return _ArtistList;
}
}
In my Wpf application, I've two datatemplates. DefaultDataTemplate and EditableDataTemplate.
Xaml:
<DataTemplate x:Key="DefaultDataTemplate" >
<StackPanel Orientation="Horizontal" Width="596">
<TextBlock Text="{Binding ClientNameBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="145"/>
<TextBlock Text="{Binding ApplicationNameBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="90"/>
<TextBlock Text="{Binding StartTimeBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="100"/>
<TextBlock Text="{Binding StopTimeBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="60"/>
<TextBlock Text="{Binding TaskNameBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="71"/>
<TextBlock Text="{Binding ProjectNameBinding}" Background="Transparent" Padding="0" Margin="0" TextWrapping="Wrap" Width="130"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="EditableDataTemplate">
<StackPanel Orientation="Horizontal" Width="596">
<!--<ComboBox x:Name="ClientComboBox" SelectionChanged="ClientComboBoxChanged" ItemsSource="{Binding Path=clientList, ElementName=MainWin}" SelectedValuePath="_id" DisplayMemberPath="_name" SelectedItem="{Binding ClientNameBindingClass, Mode=OneWayToSource}" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" Width="145"/>-->
<TextBox Text="{Binding ClientNameBinding,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" TextWrapping="Wrap" Width="145"/>
<TextBox Text="{Binding ApplicationNameBinding}" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" TextWrapping="Wrap" Width="90"/>
<xctk:TimePicker Name="StartPicker" Value="{Binding StartValue, ElementName=MainWin, UpdateSourceTrigger=PropertyChanged}" Format="Custom" FormatString="hh:mm tt" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" Width="100" EndTime="11:59:0"/>
<xctk:TimePicker Name="EndPicker" Value="{Binding EndValue, ElementName=MainWin, UpdateSourceTrigger=PropertyChanged}" Format="Custom" FormatString="hh:mm tt" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" Width="60" EndTime="11:59:0"/>
<TextBox Text="{Binding TaskNameBinding}" Background="Yellow" Padding="0" Margin="0" BorderThickness="0" TextWrapping="Wrap" Width="71"/>
<ComboBox x:Name="ProjectComboBox" ItemsSource="{Binding Path=projectList, ElementName=MainWin}" SelectedValuePath="_id" DisplayMemberPath="_name" SelectedItem="{Binding ProjectNameBindingClass, Mode=OneWayToSource}" Width="130" Background="Yellow" BorderThickness="0"/>
</StackPanel>
</DataTemplate>
In the following code, I'm trying to change datatemplate so that I can edit existing data entries of the listbox. As per below code, when I move from DefaultDataTemplate to EditableDataTemplate, I can edit all the entries because all entries in edit mode. After editing is done when I click on button again,I just want to post that entry which I changed (whose text changed/ updated). But the problem is, on button click all the entries are getting posted to the web account to which I linked.
C#:
private void EditButton_Click(object sender, RoutedEventArgs e)
{
foreach (Harvest_TimeSheetEntry item in listBox1.Items)
{
if (item.isSynced)
{
item.isSynced = false;
listBox1.ItemTemplate = (DataTemplate)this.FindResource("EditableDataTemplate");
this.EditButton.Content = "Done Editing";
}
else
{
listBox1.ItemTemplate = (DataTemplate)this.FindResource("DefaultDataTemplate");
this.EditButton.Content = "Edit";
Globals._globalController.harvestManager.postHarvestEntry(item);
System.Windows.MessageBox.Show("Entry posted");
}
}
}
Below line is used for posting entry to Web account-
Globals._globalController.harvestManager.postHarvestEntry(item);
Please suggest something, how should I proceed?
You can add in the class Harvest_TimeSheetEntry a Property "DirtyFlag" that indicates that at least one value was changed.
public class Harvest_TimeSheetEntry
{
public bool DirtyFlag {get; private set;}
public void Reset()
{
DirtyFlag = false;
}
public DateTime StartValue
{
get { return _startValue; }
set
{
_startValue = value;
// in each of the modifyable Properties add this
DirtyFlag = true;
}
}
(...)
}
In your Button Event Handler you check then for this Flag:
private void EditButton_Click(object sender, RoutedEventArgs e)
{
foreach (Harvest_TimeSheetEntry item in listBox1.Items)
{
if (item.isSynced)
{
item.Reset();
item.isSynced = false;
listBox1.ItemTemplate = (DataTemplate)this.FindResource("EditableDataTemplate");
this.EditButton.Content = "Done Editing";
}
else
{
listBox1.ItemTemplate = (DataTemplate)this.FindResource("DefaultDataTemplate");
this.EditButton.Content = "Edit";
if(item.DirtyFlag)
{
Globals._globalController.harvestManager.postHarvestEntry(item);
item.Reset();
System.Windows.MessageBox.Show("Entry posted");
}
}
}
}
I am trying to add an object to an ObservableCollection. As mentioned in a few question on this very site, I even tried to instantiate the collection before adding item. However, I am still getting the error. Here is my observation collection:
//Datacontext for local database
private WordDataContext wordsDB;
//Observable collection for binding
private ObservableCollection<WordItem> _wordItems = new ObservableCollection<WordItem>();
public ObservableCollection<WordItem> WordItems
{
get
{
return _wordItems;
}
set
{
if (_wordItems != value)
{
_wordItems = value;
NotifyPropertyChanged("WordItems");
}
}
}
I have overridden onNavigatedTo
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
// Define the query to gather all of the idea items.
var wordItemsInDB = from WordItem word in wordsDB.WordItems
select word;
// Execute the query and place the results into a collection.
WordItems = new ObservableCollection<WordItem>(wordItemsInDB);
// Call the base method.
base.OnNavigatedTo(e);
}
And here is the button to add new item
private void newIdeaAddButton_Click(object sender, RoutedEventArgs e)
{
//// Create a new idea item based on the text box.
//WordItem newIdea = new WordItem { WordName = "TestTest" };
//Debug.WriteLine("I'm here!");
//// Add a idea item to the observable collection.
//WordItems.Add(newIdea);
//// Add a idea item to the local database.
//wordsDB.WordItems.InsertOnSubmit(newIdea);
WordItem newword = new WordItem { WordName = "Bingo" };
if (WordItems == null)
{
Debug.WriteLine("I'm null!");
WordItems = new ObservableCollection<WordItem>();
}
WordItems.Add(newword);
wordsDB.WordItems.InsertOnSubmit(newword);
Debug.WriteLine("Did something!");
}
And here's the XAML
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<!--<ListBox Margin="14,0,-12,0" FontSize="{StaticResource PhoneFontSizeExtraLarge}" FontFamily="{StaticResource PhoneFontFamilySemiLight}">
<ListBoxItem Content="About" Tap="GoToAbout"/>
</ListBox>-->
<telerikData:RadJumpList x:Name="TestList" IsStickyHeaderEnabled="True" Margin="14,0,-12,0" ItemsSource="{Binding WordItems}">
<telerikData:RadJumpList.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Height="74">
<Rectangle x:Name="Bully" Width="20" Fill="Gray" Height="62" VerticalAlignment="Top" HorizontalAlignment="Left" />
<TextBlock Style="{StaticResource PhoneTextExtraLargeStyle}" Text="{Binding WordItem}" VerticalAlignment="Top"/>
</StackPanel>
</DataTemplate>
</telerikData:RadJumpList.ItemTemplate>
<telerikData:RadJumpList.StickyHeaderTemplate>
<DataTemplate>
<Border HorizontalAlignment="Stretch" Background="{StaticResource PhoneBackgroundBrush}" Height="74">
<Border Background="{StaticResource PhoneAccentBrush}" VerticalAlignment="Top" HorizontalAlignment="Left" Width="62" Height="62">
<TextBlock Text="{Binding}" FontFamily="{StaticResource PhoneFontFamilySemiLight}" FontSize="{StaticResource PhoneFontSizeExtraLarge}" Padding="7,0,0,0" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</Border>
</DataTemplate>
</telerikData:RadJumpList.StickyHeaderTemplate>
<telerikData:RadJumpList.GroupHeaderTemplate>
<DataTemplate>
<Border HorizontalAlignment="Stretch" Background="{StaticResource PhoneBackgroundBrush}" Height="74">
<Border Background="{StaticResource PhoneAccentBrush}" VerticalAlignment="Top" HorizontalAlignment="Left" Width="62" Height="62">
<TextBlock Text="{Binding}" FontFamily="{StaticResource PhoneFontFamilySemiLight}" FontSize="{StaticResource PhoneFontSizeExtraLarge}" Padding="7,0,0,0" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</Border>
</DataTemplate>
</telerikData:RadJumpList.GroupHeaderTemplate>
<telerikData:RadJumpList.GroupPickerItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel HorizontalAlignment="Center" ItemHeight="111" ItemWidth="111"/>
</ItemsPanelTemplate>
</telerikData:RadJumpList.GroupPickerItemsPanel>
<telerikData:RadJumpList.GroupPickerItemTemplate>
<DataTemplate>
<Border Background="{StaticResource PhoneAccentBrush}" Width="99" Height="99" VerticalAlignment="Top" HorizontalAlignment="Left">
<TextBlock Text="{Binding}" Style="{StaticResource PhoneTextExtraLargeStyle}" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</DataTemplate>
</telerikData:RadJumpList.GroupPickerItemTemplate>
</telerikData:RadJumpList>
<Button x:Name="newIdeaAddButton" Click="newIdeaAddButton_Click" Content="Button" Height="72" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="160" />
</Grid>
Okay, I finally got the solution! The problem in itself is a bit obscure. The thing is that, earlier, I had RadJumplist bound to a List<strings> and it had GroupDescriptor defined accordingly
GenericGroupDescriptor<string, string> testgroup = new GenericGroupDescriptor<string, string>(listitem => listitem.Substring(0, 1).ToLower());
However, the scenario in question is about ObservableCollection<WordItem>. As soon as an item is added to the collection, the RadJumpList is notified about those changes and the GroupDescriptor proves to be invalid in that context. That somehow raises the NullReferenceException. It's a bit unintuitive to relate the error with the cause.
So, the simple solution was to change the descriptor as follows
GenericGroupDescriptor<WordItem, string> gengd = new GenericGroupDescriptor<WordItem, string>();
gengd.KeySelector = (WordItem item) =>
{
char keyhead = item.WordName[0];
return keyhead.ToString().ToLower();
};
This thing is not really well documented!
I have a SQL Server DB with the following tables and relationships:
Jobs which contains many sessions.
Sessions which contains many breaks.
First of all, dont be frightened by the large amount of code posted here. The relevant parts are the highlighted parts dealing with the list, the rest is just for comparison to see where I am going wrong.
In XAML I am trying and succeeding when binding jobs. I get it to filter out the correct sessions. No problem there.
My problem is that when I try to get it to filter the breaks that belong to each session it wont work but I am using all the same principles.
I am not using (nor interested in using) Linq2Sql as it creates too many additional classes that bloat my code. I am just using direct databinding.
I have asked this question before and posted code, but I never got any reply because the code was simply too long to read in a reasonable timeframe.
My question here is, what am I doing wrong. I was with the impression that since I can successfully bind and filter sessions, then I should be able to do likewise with sessions and filter breaks. But it doesnt work.
I am getting somewhat desparate for help and appreicate any answers.
EDIT: Once again I have included code samples. I am not trying to hide the code for secrecy and copyright. It is just an exercise I am doing to learn so I wouldnt mind posting the full code. But it is very long. So I will just post the parts I think are relevant. If you want more just ask.
For those of you interested in skipping to the good part where the problems are, look under the part of the Breaks list box. The rest is just there for comparison to help you debug. There is also C# code below to help further. Again, look at the list part the rest is just for debugging.
Below is the relevant XAML
<!--Jobs List box - Works fine-->
<ListBox Name="lstJobs" DockPanel.Dock="Top"
MinWidth="150" MinHeight="200" MaxHeight="250"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstJobs_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
DataContext="{Binding Tables[JobDetails]}"
ItemsSource="{Binding}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=Title}"/>
<TextBlock Text=" "/>
<TextBlock Text="{Binding Path=ID}"/>
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Jobs listbox is bound to relevant fields in jobs table. This works fine-->
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}" Name="txtJobNo" Grid.Row="1" IsEnabled="False"/>
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}" Name="txtJobTitle" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}" Name="txtJobDesc" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="2"/>
<!--Sessions List box, Automatically filtered based on relationship (see last binding line). This works fine too-->
<ListBox Name="lstSessions" DockPanel.Dock="Top" MinWidth="150"
MinHeight="200" MaxHeight="220"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstSessions_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
DataContext="{Binding Path=Tables[JobDetails]}"
ItemsSource="{Binding Path=relJobDetailsSessionDetails}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=Title}" />
<TextBlock Text="{Binding Path=ID}" />
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Sessions listbox is bound to relevant fields in Sessions table. This works fine-->
<TextBox Name="txtSessionNo" Text="{Binding ElementName=lstSessions, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="0"/>
<TextBox Name="txtSessionTitle" Text="{Binding ElementName=lstSessions, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="3"/>
<TextBox Name="txtSessionDesc" Text="{Binding ElementName=lstSessions, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="2"/>
<!--Breaks List box, Should be automatically filtered (it is), but it does not change when a job or session is selected. Why?? -->
<ListBox Name="lstBreaks" MinWidth="150" MinHeight="140" MaxHeight="140"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstBreaks_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
DataContext="{Binding Path=Tables[SessionDetails]}"
ItemsSource="{Binding Path=relSessionDetailsBreakDetails}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=Title}" />
<TextBlock Text="{Binding Path=ID}" />
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Breaks listbox is bound to relevant fields in Breaks table. This works fine as before-->
<TextBox Name="txtBreakNo" Text="{Binding ElementName=lstBreaks, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="0"/>
<TextBox Name="txtBreakTitle" Text="{Binding ElementName=lstBreaks, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
<ComboBox Name="cbxBreakType" Text="{Binding ElementName=lstBreaks, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Grid.Column="3"/>
Following is the C# Code behind (Once again, the highlighted part is the breaks and the rest is just for comparison, so you can skip directly to that if you like):
//Connection String
string conString = "XYZ Works ok, no prob here";
//Data Adaptors for various tables
SqlDataAdapter daJobDetails = new SqlDataAdapter();
SqlDataAdapter daSessionDetails = new SqlDataAdapter();
SqlDataAdapter daBreakDetails = new SqlDataAdapter();
//The dataset to hold all of the data
DataSet dsDataSet = new DataSet();
//Step 1: Create Connection
SqlConnection conn = new SqlConnection(conString);
//Open Connection
conn.Open();
//Load Job Details Table - works fine.
daJobDetails.SelectCommand = new SqlCommand("Select * From JobDetails", conn);
daJobDetails.Fill(dsDataSet, "JobDetails");
//Load Session Details table - works fine.
daSessionDetails.SelectCommand = new SqlCommand("SELECT * FROM SessionDetails", conn);
daSessionDetails.Fill(dsDataSet, "SessionDetails");
//Relation: JobDetails.ID = SessionDetails.JobID. - Works fine
dsDataSet.Relations.Add("relJobDetailsSessionDetails",
dsDataSet.Tables["JobDetails"].Columns["ID"],
dsDataSet.Tables["SessionDetails"].Columns["JobID"]);
//**** Possible problem code *****
//Load Break Details table - could there be something wrong here.
daBreakDetails.SelectCommand = new SqlCommand("SELECT * FROM BreakDetails", conn);
daBreakDetails.Fill(dsDataSet, "BreakDetails");
//**** Possible problem code *****
//Relation: SessionDetails.ID = BreakDetails.SessionID - Could there be something wrong here
dsDataSet.Relations.Add("relSessionDetailsBreakDetails",
dsDataSet.Tables["SessionDetails"].Columns["ID"],
dsDataSet.Tables["BreakDetails"].Columns["SessionID"]);
//Set the DataContext to the DataSet
expJobs.DataContext = dsDataSet;
//Close connection
conn.Close();
As requested, here is a full repro case.
Update: updated with the working code from your link. Looks like the answer was binding to SelectedItem => relation. Very logical, actually.
XAML:
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height=".33*"/>
<RowDefinition Height=".33*"/>
<RowDefinition Height=".33*"/>
</Grid.RowDefinitions>
<!--Jobs List box - Works fine-->
<ListBox Name="lstJobs" Grid.Column="0" Grid.Row="0"
MinWidth="150"
MinHeight="200"
MaxHeight="250"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstJobs_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding Path=JobDetails}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=ID}"/>
<TextBlock Text="{Binding Path=Title}"/>
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Jobs listbox is bound to relevant fields in jobs table. This works fine-->
<StackPanel Orientation="Vertical" Grid.Column="1" Grid.Row="0">
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}"
Name="txtJobNo" Grid.Row="1" IsEnabled="False"/>
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}"
Name="txtJobTitle" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
<TextBox Text="{Binding ElementName=lstJobs, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}"
Name="txtJobDesc" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="2"/>
</StackPanel>
<!--Sessions List box, Automatically filtered based on relationship (see last binding line). This works fine too -->
<ListBox Name="lstSessions" Grid.Column="0" Grid.Row="1"
DockPanel.Dock="Top"
MinWidth="150"
MinHeight="200"
MaxHeight="220"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstSessions_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ElementName=lstJobs, Path=SelectedItem.relJobDetailsSessionDetails}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=Title}" />
<TextBlock Text="{Binding Path=ID}" />
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Sessions listbox is bound to relevant fields in Sessions table. This works fine-->
<StackPanel Orientation="Vertical" Grid.Column="1" Grid.Row="1">
<TextBox Name="txtSessionNo" Text="{Binding ElementName=lstSessions, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="1" Grid.Column="0"/>
<TextBox Name="txtSessionTitle" Text="{Binding ElementName=lstSessions, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="3"/>
<TextBox Name="txtSessionDesc" Text="{Binding ElementName=lstSessions, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="2"/>
</StackPanel>
<!--Breaks List box, Should be automatically filtered (it is), but it does not change when a job or session is selected. Why?? -->
<ListBox Name="lstBreaks" Grid.Column="0" Grid.Row="2"
MinWidth="150"
MinHeight="140"
MaxHeight="140"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="lstBreaks_SelectionChanged"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ElementName=lstSessions, Path=SelectedItem.relSessionDetailsBreakDetails}"
>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal" Margin="3,0,3,0">
<TextBlock Text="{Binding Path=Title}" />
<TextBlock Text="{Binding Path=ID}" />
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--How Breaks listbox is bound to relevant fields in Breaks table. This works fine as before-->
<StackPanel Orientation="Vertical" Grid.Column="1" Grid.Row="2">
<TextBox Name="txtBreakNo" DockPanel.Dock="Bottom"
Text="{Binding ElementName=lstBreaks, Path=SelectedItem.ID, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="2" Grid.Column="1"/>
<TextBox Name="txtBreakTitle" DockPanel.Dock="Bottom"
Text="{Binding ElementName=lstBreaks, Path=SelectedItem.Title, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="2" Grid.Column="2"/>
<ComboBox Name="cbxBreakType" DockPanel.Dock="Bottom"
Text="{Binding ElementName=lstBreaks, Path=SelectedItem.Description, UpdateSourceTrigger=PropertyChanged}"
Grid.Row="2" Grid.Column="3"/>
</StackPanel>
</Grid>
</Window>
Code behind:
using System;
using System.Data;
using System.Windows;
using System.Windows.Controls;
namespace WpfApplication2
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
CreateData();
this.DataContext = Data;
}
public DataSet Data { get; set; }
private void CreateData()
{
Data = new DataSet();
Data.Tables.Add(CreateJobTable());
Data.Tables.Add(CreateSessionsTable());
Data.Tables.Add(CreateBreaks());
DataRelation relation = GetJobSessionRelations();
DataRelation relation2 = GetSessionBreakRelations();
Data.Relations.AddRange(new[] {relation, relation2});
}
private DataTable CreateJobTable()
{
var jobs = new DataTable();
jobs.TableName = "JobDetails";
var col1 = new DataColumn("ID");
var col2 = new DataColumn("Title");
var col3 = new DataColumn("Description");
col1.DataType = Type.GetType("System.Int32");
col2.DataType = Type.GetType("System.String");
col3.DataType = Type.GetType("System.String");
jobs.Columns.Add(col1);
jobs.Columns.Add(col2);
jobs.Columns.Add(col3);
DataRow row = jobs.NewRow();
row["ID"] = 1;
row["Title"] = "Job 1";
row["Description"] = "Job Desc 1";
jobs.Rows.Add(row);
DataRow row2 = jobs.NewRow();
row2["ID"] = 2;
row2["Title"] = "Job 2";
row2["Description"] = "Job Desc 2";
jobs.Rows.Add(row2);
return jobs;
}
private DataTable CreateSessionsTable()
{
var sessions = new DataTable();
sessions.TableName = "SessionDetails";
var col1 = new DataColumn("ID");
var col2 = new DataColumn("Title");
var col3 = new DataColumn("Description");
var col4 = new DataColumn("JobID");
col1.DataType = Type.GetType("System.Int32");
col2.DataType = Type.GetType("System.String");
col3.DataType = Type.GetType("System.String");
col4.DataType = Type.GetType("System.Int32");
sessions.Columns.Add(col1);
sessions.Columns.Add(col2);
sessions.Columns.Add(col3);
sessions.Columns.Add(col4);
DataRow row = sessions.NewRow();
row["ID"] = 1;
row["Title"] = "Session 1";
row["Description"] = "Session Desc 1";
row["JobID"] = 1;
sessions.Rows.Add(row);
DataRow row2 = sessions.NewRow();
row2["ID"] = 2;
row2["Title"] = "Session 2";
row2["Description"] = "Session Desc 2";
row2["JobID"] = 1;
sessions.Rows.Add(row2);
DataRow row3 = sessions.NewRow();
row3["ID"] = 3;
row3["Title"] = "Session 3";
row3["Description"] = "Session Desc 3";
row3["JobID"] = 2;
sessions.Rows.Add(row3);
DataRow row4 = sessions.NewRow();
row4["ID"] = 4;
row4["Title"] = "Session 4";
row4["Description"] = "Session Desc 4";
row4["JobID"] = 2;
sessions.Rows.Add(row4);
return sessions;
}
private DataTable CreateBreaks()
{
var breaks = new DataTable();
breaks.TableName = "BreakDetails";
var col1 = new DataColumn("ID");
var col2 = new DataColumn("Title");
var col3 = new DataColumn("Description");
var col4 = new DataColumn("SessionID");
col1.DataType = Type.GetType("System.Int32");
col2.DataType = Type.GetType("System.String");
col3.DataType = Type.GetType("System.String");
col4.DataType = Type.GetType("System.Int32");
breaks.Columns.Add(col1);
breaks.Columns.Add(col2);
breaks.Columns.Add(col3);
breaks.Columns.Add(col4);
DataRow row = breaks.NewRow();
row["ID"] = 1;
row["Title"] = "Break 1";
row["Description"] = "Break Desc 1";
row["SessionID"] = 1;
breaks.Rows.Add(row);
DataRow row2 = breaks.NewRow();
row2["ID"] = 2;
row2["Title"] = "Break 2";
row2["Description"] = "Break Desc 2";
row2["SessionID"] = 2;
breaks.Rows.Add(row2);
DataRow row3 = breaks.NewRow();
row3["ID"] = 3;
row3["Title"] = "Break 3";
row3["Description"] = "Break Desc 3";
row3["SessionID"] = 3;
breaks.Rows.Add(row3);
DataRow row4 = breaks.NewRow();
row4["ID"] = 4;
row4["Title"] = "Break 4";
row4["Description"] = "Break Desc 4";
row4["SessionID"] = 4;
breaks.Rows.Add(row4);
return breaks;
}
private DataRelation GetSessionBreakRelations()
{
return new DataRelation("relJobDetailsSessionDetails", Data.Tables["JobDetails"].Columns["ID"],
Data.Tables["SessionDetails"].Columns["JobID"]);
}
private DataRelation GetJobSessionRelations()
{
var dataRelation = new DataRelation("relSessionDetailsBreakDetails", Data.Tables["SessionDetails"].Columns["ID"],
Data.Tables["BreakDetails"].Columns["SessionID"]);
return dataRelation;
}
private void lstJobs_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
private void lstSessions_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
private void lstBreaks_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
}
}