I have ListBox that has binding to the collection (Publishers), every publisher has a name and collection of authors in it, every author has a name. So how can I provide binding to author's name?
<TextBlock Text="{Binding name}" Grid.Column="1" Grid.Row="1"></TextBlock>
<TextBlock Text="{Binding city}" Grid.Column="1" Grid.Row="0"></TextBlock>
It is binding to a publisher's name and city.
Something like this provided that the Publisher class, or whatever you call it, exposes the authors using a public collection property that has an indexer:
<ListBox x:Name="listBox" ItemsSource="{Binding Publishers}" .... />
<TextBlock Text="{Binding SelectedItem.Authors[0].Name, ElementName=listBox}" Grid.Column="1" Grid.Row="0"></TextBlock>
This will the display the name of the first author at index 0.
If you intend to display all authors of the selected publisher, you should use an ItemsControl:
<ItemsControl ItemsSource="{Binding SelectedItem.Authors, ElementName=listBox}"
Grid.Column="1" Grid.Row="0">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}"></TextBlock>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<ListBox ItemsSource="{Binding}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding name}"></TextBlock>
<ListBox ItemsSource="{Binding authors}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding name}"></TextBlock>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
This will show name of a publisher with a list of all its authors for every publisher. I assumed a publisher has a property named authors that returns IEnumerable<Author>
An author would be an element in a collection which is part of a publisher.
So there is no way for WPF to 'know' which author's name to display: there are multiple.
Instead of a textblock, an ItemsControl could be used that binds its ItemsCollection to the collection of authors in the current publisher.
Related
i am completly new to WPF and need your help. I followed many tutorials but nothing works.
I have two ObserveableLists L1 and L2 to bind and I want to archiev:
On depth 1 - The first List and for each child list 2.
L1.1
L2.1
L2.2
L2.3
L1.2
L2.1
L2.2
L2.3
L1.3
L2.1
L2.2
L2.3
Update 16.02.07 - 16:44
My first try:
<TreeView Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Row="1" Margin="10" ItemsSource="{Binding orderCities}">
<TreeView.Resources>
<DataTemplate DataType="{x:Type model:city}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding name}" />
</StackPanel>
</DataTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding products}" DataType="{x:Type model:Product}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding name}" />
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
My second try: Defining two DataTemplates how to handle my types:
<UserControl.Resources>
<HierarchicalDataTemplate DataType="{ x:TypeExtension model:city }" ItemsSource="{Binding orderCities}">
<StackPanel>
<TextBlock Text="{Binding name}" />
<!-- Here embed Product Type (Dont know how)-->
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{ x:TypeExtension model:Product }" ItemsSource="{Binding products}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding name}" />
<TextBlock Text=" - " />
<TextBox Text="1" />
</StackPanel>
</HierarchicalDataTemplate>
</UserControl.Resources>
And testet both templates and got the right design.
<TreeView ItemsSource="{Binding orderCities}" />
<TreeView ItemsSource="{Binding orderCities}" />
The treeview alone won't help you here. You have to actually create the data you want to display, i.e. the treeview won't "multiply" the two lists.
Each element in the first list may of course return the same instance of the second list in its children-property. You might want to have look at this codeproject article, it's rather old, but gives a nice introduction on how to use the wpf treeview.
In my application I have the following which works fine.
<ListView ItemsSource="{Binding Items}">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,27.5">
<TextBlock Text="{Binding Name}" />
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
But now I want to bind a different sort of Items which have no Name property, but a Title property.
I've tried the following:
<TextBlock Text="{Binding {Binding MyDynamicProperty}}" />
So that I could set MyDynamicProperty in code to either Name or Title, but it crashes pretty soon.
Now I'm not really sure how I should go about this so that I can bind several different Items collections with a different property for the text to display.
I have some problems binding a ListBox to the elements of a collection in a collection.. Let me explain:
I have a collection, ObservableCollection<Test> named testsCollection. Every test contains an ObservableCollection<LogEvent> named LogEvents. Every LogEvent has a Message that I need to display in the ListBox.
I need to display every "Message" in every "LogEvent" in every "Test". It has to be displayed in a flat list so I'm using a ListBox.
Here's a summary of what I tried:
DataContext = testCollection; // testCollection is an ObservableCollection<Test>
The I put this in the XAML:
<ListBox ItemsSource="{Binding LogEvents}" ItemTemplate="{StaticResource stepItemTemplate}">
Finally, here's the ItemTemplate, stepItemTemplate:
<DataTemplate x:Key="stepItemTemplate">
<TextBlock Text="{Binding Message}"></TextBlock>
</DataTemplate>
This "works" but it only displays the Messages in the LogEvents of the first Test. But I need to display every Messages of every LogEvent of every Test.. And I don't know what to try anymore :(
You should Usser ItemsControl when you want to bind a scenario like this
<ListBox ItemsSource="{Binding testsCollection}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Message}" FontSize="20" />
<ItemsControl ItemsSource="{Binding LogEvents}" Margin="0 20 0 0">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Blue" BorderThickness="2">
<TextBlock Text="{Binding Message}" FontSize="20" />
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
I have a textblock which is inside a listbox and I am trying to write an if statement which is dependant on the contents of this textblock. I am trying to get the data from the TextBlack which I have named "category1" however when I try to write my if statement I am getting a message which just says
"the name category1 does not exist in the current context"
I tired moving that TextBLock out of the ListBox and it works fine but wont work while its inside there. Does anyone know how to reference this textblock.
Here is the my XAML code
<ListBox x:Name="HINList" Margin="0,300,-12,0" ItemsSource="{Binding Details}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432">
<TextBlock Text="{Binding HINNumber}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="{Binding CategoryLetter}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="category1" Text="{Binding Category1}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="{Binding Category2}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="{Binding Category3}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Assuming you're writing your if statement in the code behind file, wouldn't something like:
if(((WhateverTypeIsInDetailsCollection)HINList.SelectedItem).Category1 == something) {
// then do whatever you want
}
As Russell pointed out there is a category1 item for every entry in the list. I assume you wanted to do something with the selected item.
This is due to xaml namescopes. The names inside a DataTemplate are in a different namescope than outside, that's why you can't access them (what #Russell pointed is part of why it's done this way).
I think that you want to access that field for the "Category1" property on the selected item of the HINList ListBox that is bound to the Details collection. What you can do is set the binding on the Category1 to be two way, and bind the SelectedItem of the ListBox to a Detail item like so:
xaml:
<ListBox x:Name="HINList" ItemsSource="{Binding Details}"
SelectedItem={Binding SelectedDetailItem, Mode=TwoWay}>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432">
<TextBlock Text="{Binding Category1, Mode=TwoWay}" TextWrapping="Wrap" .../>
<!-- the other fields -->
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
code-behind
if(SelectedDetailsItem.Category1==...)
{
....
}
Hope this helps :)
In my application using DataTemplate mechanism I insert into ListBox item another listbox. But is it possible that when selected one listboxitem in parent listbox, the focus may be on another parent listboxitem's child (see picture)
How to do: if one of child listbox in focus (one item from them selected), then parent listboxitem being selected to? Using binding or templating
<DataTemplate x:Key="NotesListBoxDataTemplate" DataType="Note">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<TextBox Text="{Binding Path=Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
<my:DatePicker Height="25" Name="datePicker1" Width="115" xmlns:my="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit"
SelectedDate="{Binding LastEdit,
Mode = TwoWay}" />
</StackPanel>
<TextBox Text="{Binding Path=Content, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
<StackPanel Orientation="Horizontal">
<ListBox Name="ImagesListBox" SelectedIndex="{Binding Mode=OneWayToSource, Source={StaticResource progParameters}, Path=SelectedImage, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Path=Images}" ItemTemplate="{StaticResource NotesListBoxImagesTemplate}" Style="{StaticResource HorizontalListBox}">
</ListBox>
<StackPanel Orientation="Vertical">
<Button Name="AddImageButon" Content="+" Click="AddImageButon_Click"></Button>
<Button Name="RemoveImageButon" Content="-" Click="RemoveImageButon_Click"></Button>
</StackPanel>
</StackPanel>
</StackPanel>
</DataTemplate>
On the parent ListBox set property IsSynchronizedWithCurrentItem to true, then in the inner ListBoxes set the SelectedItem property to "{Binding SelectedItem ElementName=lbParent}".
Consider using a Converter to help you get specific data that is not accessible thru xaml or if you need to do some caculations.
Hope this helps.