I have a collection that looks like this:
ObservableDictionary<string, ObservableDictionary<string, SystemStatusItem>> ObservableColoServerStatus
I am working on creating a user control that I would like to bind as follows:
Each key (string) key from the outer dictionary should dynamically create an expander.
Inside that expander is a ListView/DataGrid/some control for displaying a collection of information
Each line in the ListView/DataGrid or whatever will be composed of a combination of the (string) Key and a property from the (object)Value of the inner dictionary.
Ideally it should look and operate similarly to a TreeView however Expanders have been widely used through our UI so I would like to stick to this for consistency.
I am new to WPF and have done a bit of basic data binding before but the nature of this nested relationship is making this really difficult to wrap my head around
Ok, first lets asume that you ObservableDictionary is a collection of items that have a Key property and a Value property. What you want can be done in wpf using data templates, please see this code, try do it in this way:
<ListBox ItemsSource="{Binding ObservableColoServerStatus}">
<ListBox.ItemTemplate>
<DataTemplate>
<Expander Header="{Binding Key}">
<ListBox ItemsSource="{Binding Value}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Key}"/>
<TextBlock Text="{Binding Value}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Expander>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
It is a list box, that has as ItemsSource your ObservableDictionary, then in the item template property you set the template that will use for representing all it itmes. In this case an expander, that have in the header the key a list box that take the elements from the Value of the first dictionary, and then you have set the template again. It is similar. Hope it works for you...
Related
I have a Dictionary acting as sort of a phonebook. It uses a character from the alphabet as a key, and an observable collection of classes as the value. These classes include properties like FirstName, LastName, etc...
It looks like this
Dictionary<char,ObservableCollection<NameClass>> NameDictionary
The goal is to be able to use this dictionary as an itemsource for a listbox, and insert the key into the listbox, followed by every NameClass.FirstName that is in the observable collection for that specific key.
This is a stripped-down version DataTemplate I currently have
<DataTemplate x:Key="HeaderTemplate" >
<TextBlock Text="{Binding Key}"/>
<TextBlock Text="{Binding Value}"/>
</DataTemplate>
This is the ListBox that uses the DataTemplate and NameDictionary as a source.
<ListBox x:Name="NameList"
Style="{StaticResource ListStyle}"
ItemContainerStyle="{StaticResource ContainerStyle}"
ItemsPanel="{StaticResource PanelTemplate}"
ItemTemplate="{StaticResource HeaderTemplate}"
ItemsSource="{Binding NameDictionary, IsAsync=True}"
SelectedValue="{Binding ItemIndex}"
SelectedValuePath="Key">
The xaml I currently have will insert the key and ObservableCollection into the Listbox, but I want it to insert all of the items inside of the ObservableCollection, not the collection itself.
For a visual example, I want to make something that looks like this
Char
NameClass.FirstName
NameClass.FirstName
NameClass.FirstName
Char
NameClass.FirstName
NameClass.FirstName
NameClass.FirstName
But what is currently being inserted is this
Char
ObservableCollection
Char
ObservableCollection
Char
ObservableCollection
I would prefer to use xaml for this, and not code behind. I assume this is not too difficult to do, and I will appreciate any help with this.
Your "HeaderTemplate" does not compile because it lacks a panel which hosts multiple elements. Said that, you can modify it to host another ListBox whose ItemsSource to be bound to Value as follows.
<DataTemplate x:Key="HeaderTemplate">
<StackPanel>
<TextBlock Text="{Binding Key}"/>
<ListBox ItemsSource="{Binding Value}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding FirstName}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</DataTemplate>
How can i represent my collection(list) of Attributes when every Attribute contains his name and list of values? Inner lists(values) usually have different lengths. Im using wpf.
I was trying to use DataGrid but cant bind collection properly
You can use ItemsControl with ItemTemplate property set to the DataTemplate with another ItemsControl, like in the following:
> <ItemsControl ItemsSource="{Binding OuterList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
<ItemsControl ItemsSource="{Binding InnerList}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I'm working on a project (for Windows Phone 8 with Visual Studio 2012 with C#) where I want to display some items that each have:
a picture
a title
a description
to be able to be clicked (so that I can navigate to a certain Page)
So I thought I could do that with a stackpanel. But I'm not sure how I can add items that have the above properties and to be able to add those items from XAML. I tired adding items through a ItemsControl in stackpanel but I'm not sure how I can add more complex items like the one I want.
The best approach is to use a ListBox or LongListSelector rather than a StackPanel. You can then:
Data bind the list to the control itself, which will handle adding/deleting items from the control automatically
Define the view for each control using ListBox's ItemTemplate property
First of all, in your code-behind/ViewModel/what-have-you, you'll want to create an ObservableCollection of objects to display. ObservableCollection will let the control know to update in the case an item is added, removed, etc.
public ObservableCollection<T> foo = new ObservableCollection<T>();
In XAML, you'll then want to databind this ObservableCollection to the ListBox you've created:
<ListBox x:Name="ListBox" ItemsSource="{Binding foo}" />
Finally, you can define the ItemTemplate of the ListBox like so:
<ListBox x:Name="ListBox" ItemsSource="{Binding foo}" >
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="2">
<TextBlock Text="{Binding Title}" />
<TextBlock Text="{Binding Description}" />
<Image Source="{Binding Image}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
I'd highly recommend reading this guide, especially "Binding a control to a collection of objects" and the section after on DataTemplates. :)
Right now I use a ListBox but that allows the user to select an item which I don't want. Is there a way to disable selecting or a more suitable control I can use?
Right now I have this:
<ListBox ItemsSource="{Binding Path=PersonNames}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" FontSize="20"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Use an ItemsControl, it's a base class without selection. (As it does not provide its own ScrollViewer you may need to add one (either in the template or around the control) if you need scrolling)
See the ListView control.
I want to show a list of "properties" in my application. A property is simply a name/value pair. The number of properties is dynamic.
The best way to do this? The only thing I can come up with is creating a ListView with an ItemTemplate. But then the items are selectable, and that's not what I want. If I make the list read-only, it becomes gray. Don't like that either.
Anyone has a better suggestion?
<ScrollViewer>
<ItemsControl ItemsSource="{Binding Properties}">
<ItemsControl.ItemTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}"/>
<TextBlock Text="{Binding Value}"/>
</StackPanel>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
Use a Grid for ItemsControl.ItemsPanel with SharedSizeGroup if you want all items to line up nicely.
Look here:
http://www.codeplex.com/wpg or here
http://dvuyka.spaces.live.com/blog/cns!305B02907E9BE19A!448.entry
They are both implmentations of PropertyGrid from WinForms