I have a listbox like this:
<ListBox x:Name="list1" ItemsSource="{Binding MyListWithTuples}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Label Content="{Binding value1}" />
<Label Content="{Binding value2}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
In my view model I have this collection:
private ObservableCollection<(decimal value1, decimal value2)> _myCollection= new ObservableCollection<(decimal value1, decimal value2)>();
public ObservableCollection<(decimal vaule1, decimal value2)> MyCollection
{
get { return _myCollection; }
set
{
_myCollection= value;
base.RaisePropertyChangedEvent("MyCollection");
}
}
But the data isn't show. However if I convert the tuple to a dictionary, I can bind to Key and Value properties and the data is shown. But I would like to avoid to convert the tuple into a dictionary.
Are there some way to bind the listbox to a list of tuples?
Thanks.
Unlike the Tuple Class, the new C# tuple types only define fields, but no properties. So you can't use them with WPF data binding.
However, with
public ObservableCollection<Tuple<decimal, decimal>> MyCollection { get; }
you could use this XAML:
<ListBox ItemsSource="{Binding MyCollection}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Label Content="{Binding Item1}" />
<Label Content="{Binding Item2}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Related
I would like to add different images next to each item in a combobox itemssource. Here's what i have at the moment.
<ComboBox x:Name="cmb" HorizontalAlignment="Left" Width="135" Height="22"
SelectedItem="{Binding myViewMode}" Margin="5,0,0,0">
<ComboBox.ItemsSource>
<x:Array Type="sys:String" xmlns:sys="clr-namespace:System;assembly=mscorlib">
<sys:String>Oranges</sys:String>
<sys:String>Mangoes</sys:String>
</x:Array>
</ComboBox.ItemsSource>
</ComboBox>
How should add the two diffent images using an itemtemplate. Thanks
Edit One
This is what i have tried with itemtemplate
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding OrangesImage}" Height="100"/>
<Image Source="{Binding MangoesImage}" />
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
It's here that am really stuck.
At the moment your item template contains only two images, so you will show two images and no text for each item!
I would suggest you change your ItemsSource to code behind so you can have text and image properties.
First make a simple Fruit class:
public class Fruit
{
public string FruitName { get; set; }
public string FruitImage { get; set; }
}
Then create a list of these fruits and set the ItemsSource of your combo box to this list:
var fruits = new List<Fruit>();
fruits.Add(new Fruit() { FruitName = "Mangos", FruitImage = #"C:\mangoimage.jpg" });
fruits.Add(new Fruit() { FruitName = "Oranges", FruitImage = #"C:\mangoimage.jpg" });
cmb.ItemsSource = fruits;
Then simplify your XAML thus:
<ComboBox x:Name="cmb" HorizontalAlignment="Left" Width="135" Height="22" SelectedItem="{Binding myViewMode}" Margin="5,0,0,0">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding FruitName}"/>
<Image Source="{Binding FruitImage}" Height="100"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
In your ItemSource your image should consists as Uri path with BitMapImage Class then only Images are accepted in ItemTemplate in ComboBox
Xaml Code
<ComboBox x:Name="cmb" HorizontalAlignment="Left" Width="135" Height="22"
SelectedItem="{Binding myViewMode}" Margin="5,0,0,0">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Width="25" Height="25" Source="{Binding FruitName}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
Your Model Class
public class Fruit
{
public string FruitName { get; set; }
}
Your ItemSource should Consists as:
fruitCollection.Add(new Fruit() {FruitName= new BitmapImage(new Uri("C:\mangoimage.jpg", UriKind.Relative))});
I have an observablecollection of Images that get populated via the following code:
<StackPanel Orientation="Horizontal" Grid.Column="0">
<ListBox ItemsSource="{Binding BigImageView}" IsSynchronizedWithCurrentItem="True"
SelectedIndex="0" SelectedItem="{Binding CurrentItem}" />
</StackPanel>
<ContentControl Name="Detail" Content="{Binding BigImageView, Mode=OneWay}"
Margin="9,0,0,0" Grid.Column="2" HorizontalAlignment="Left" VerticalAlignment="Top"/>
However the Content Control is supposed to bind to the BigImageView via an ObservableCollection
BigImage = new ObservableCollection<Image>();
_listView = CollectionViewSource.GetDefaultView(BigImage);
_listView.CurrentChanged += new EventHandler(OnCurrentChanged);
public System.ComponentModel.ICollectionView BigImageView
{
get
{
return _listView;
}
set
{
_listView = value;
OnPropertyChanged("BigImageView");
}
}
I want to return the image to the content control when I move the listbox. I have been racking my brain and trying everyhitn but it does not work. any help would be appreciated.
There is no need to bind the selecteditem, the collectionview should take care of that.
Try this:
<ListBox ItemsSource="{Binding BigImageView}" IsSynchronizedWithCurrentItem="True" />
<ContentControl Name="Detail" Content="{Binding BigImageView, Mode=OneWay}" VerticalAlignment="Top">
<ContentControl.ContentTemplate>
<DataTemplate>
<Image Source="{Binding}"/>
</DataTemplate>
<ContentControl.ContentTemplate>
1
Create a viewmodel with a list and a selected item:
public class BigImageViewModel : INotifyPropertyChanged
{
private string bigImage;
//string for path?
public ObservableCollection<string> BigImageView {get; set; } //Of course, make sure it has a value
public string SelectedBigImage
{
get { return bigImage; }
set { bigImage = values; NotifyPropertyChanged("SelectedBigImage"); }
}
}
Set this object on the DataContext of your control in the constructor:
DataContext = new BigImage(); //Make sure you initialize your list
Set the ListBox ItemsSource to your BigImage list, bind your SelectedItem to BigImageView
and use that in your content control:
<ListBox ItemsSource="{Binding BigImageView}" SelectedItem={Binding SelectedBigImage} />
ContentControl:
<ContentControl Name="Detail" Content="{Binding SelectedBigImage, Mode=OneWay}" VerticalAlignment="Top">
<ContentControl.ContentTemplate>
<DataTemplate>
<Image Source="{Binding}"/> <!-- Nice template for showing your string BigImage -->
</DataTemplate>
<ContentControl.ContentTemplate>
</ContentControl>
2
Or screw that view model:
Set the list directly in the constructor (after the InitializeComponent() ):
myListBox.ItemsSource = ObservableCollection<string>(); //Make sure you initialize your list with whatever your object is..
Give the list a name:
And bind with an ElementName binding to your selected item:
<ContentControl Name="Detail" Content="{Binding ElementName=myListBox, Path=SelectedItem}" VerticalAlignment="Top">
<ContentControl.ContentTemplate>
<DataTemplate>
<Image Source="{Binding}"/> <!-- Nice template for showing your string BigImage -->
</DataTemplate>
<ContentControl.ContentTemplate>
</ContentControl>
In XAML how would you have in a list or grid on the left side a combo box and the right side multiple check boxes in a straight line?
Let say I had a data structure like.
sudo:
// for combo
class Option
{
int key {get;set;}
string value{get;set;}
}
// for checkboxes
class Selection
{
int key {get;set;}
string value{get;set;}
bool isSelected {get;set;}
}
class Item
{
Item
{
selections = new List<Selection>();
Options = new List<Option>();
}
List<Selection> selections {get;set;}
List<Option> Options{get;set;}
}
Now this would be the item source.
List<Item> x = new List<Item>();
Item i = new Item();
i.Selections.add(blah); 25 selections
i.Options.add(blah); 3 checkboxes
x.add(i) 50 combination's.
control.itemsource = x;
What would the XAML look like. I am stuck as I quite dont get it.
Thanks...
<ListBox ItemsSource="{Binding Items}" >
<ListBox.ItemTemplate>
<DataTemplate>
<!-- This is your combobox -->
<DockPanel HorizontalAlignment="Stretch" LastChildFill="False">
<ComboBox ItemsSource="{Binding Options}" DockPanel.Dock="Left">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding value}" />
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
<!-- This is your line of checkboxes -->
<ListBox ItemsSource="{Binding Selections}" DockPanel.Dock="Right">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding isSelected}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DockPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Apologies for the long post -- Read a few threads about this, but still find it hard to implement. Basically, I have a collection of objects, defined as:
public class LibData
{
public string Name { get; set; }
ObservableCollection<LibObject> _list;
public ObservableCollection<LibObject> List { get { return _list; } }
public LibData(string name, LibDataType type)
{
this.Name = name;
_list = new ObservableCollection<LibObject>();
}
}
and the object:
public class LibObject
{
public string Name { get; set; }
public LibObject(string name)
{
this.Name = name;
}
}
My main problem is in the XAML, and styling this TreeView. I need to have a specific style for a "root" item, and a specific style for a "leaf". Thing is, that one item in the bound list is "Root->Leaf", and another is "Root->Child->Leaf".
I tried this:
<TreeView x:Name="myTree" ItemsSource="{x:Static local:myDataList}">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Path=List}" >
<Grid>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}" />
<CheckBox IsChecked="True" Content="HeaderCheckbox"/>
</StackPanel>
</Grid>
<HierarchicalDataTemplate.ItemTemplate >
<DataTemplate>
<Grid>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="True" Content="LeafCheckbox" />
<TextBlock Text="{Binding Path=Name}"/>
</StackPanel>
</Grid>
</DataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
This obviously works fine for the "Root->Leaf" item, but not for the "Root-Child-Leaf".
The XAML implementation seems to be more of a "hard coded" solution, where I know that the item layout is always "Root->Leaf" - how do I make this dynamic?
Again, I have seen solutions to different levels (including using converters), but the problem i'm having is that I need specific styles to root and leaf and nothing for levels in between.
I'm wondering if I'm looking at this completely wrong ...
Easy way to do this. Pull the DataTemplates out of the TreeView and put them in the resources section. Specify the DataType property for each DataTemplate, but do not include a key. The ItemTemplateSelector (a property of type DataTemplateSelector) on the TreeView will do the magic of using whichever DataTemplate suits the correct item type.
Create a HierarchicalDataTemplate for types Root and Child, and a DataTemplate for type Leaf.
Something like this:
<Window.Resources>
<ResourceDictionary>
<DataTemplate DataType="{x:Type local:Leaf}">
<Grid>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="True" Content="LeafCheckbox" />
<TextBlock Text="{Binding Path=SomeValue}"/>
</StackPanel>
</Grid>
</DataTemplate>
<HierarchicalDataTemplate DataType="{x:Type local:Child}"
ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Child " />
<TextBlock Text="{Binding Path=SomeValue}" />
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type local:Root}"
ItemsSource="{Binding Children}">
<Grid>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Root " />
<TextBlock Text="{Binding Path=SomeValue}" />
</StackPanel>
</Grid>
</HierarchicalDataTemplate>
</ResourceDictionary>
</Window.Resources>
<Grid>
<TreeView x:Name="myTree" ItemsSource="{Binding}" />
</Grid>
I have a WPF ListView with a collection of RadioButtons. I want to set the GroupName of the child controls to be bound to a property on the parent data context. At the moment I am doing this by duplicating the property in each of the children's data context but that can't be right.
My XAML:
<ListView ItemsSource="{Binding OptionItems}" >
<ListView.ItemTemplate>
<DataTemplate DataType="{x:Type Logging:FilterOptionsRadioListViewModel}">
<RadioButton GroupName="{Binding GroupName}" Content="{Binding Option.Value}" Tag="{Binding Option.Key}" IsChecked="{Binding IsChecked}" Command="Logging:FilterOptionsRadioListViewModel.CheckedChangedCommand" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
GroupName is a property on the parent View Model. I currently pass this onto the child View Model (where it is also a property) in the child constructor:
var item = new FilterOptionsRadioListItemViewModel(option, this.GroupName);
What is the correct way of doing this?
<ListView ItemsSource="{Binding OptionItems}" >
<ListView.ItemTemplate>
<DataTemplate DataType="{x:Type Logging:FilterOptionsRadioListViewModel}">
<RadioButton GroupName="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListView}}, Path=DataContext.GroupName}" Content="{Binding Option.Value}" Tag="{Binding Option.Key}" IsChecked="{Binding IsChecked}" Command="Logging:FilterOptionsRadioListViewModel.CheckedChangedCommand" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
You certainly can do that, but if you don't want to have to copy the GroupName to every child Option instance, you could instead do something like the following
// I'm imagining your viewmodels look something like this
public class ParentViewModel
{
private ObservableCollection<Option> m_OptionItems;
public ObservableCollection<Option> OptionItems
{
get { return m_OptionItems; }
set { m_OptionItems = value; }
}
private string m_ParentGroupName;
public string ParentGroupName
{
get { return m_ParentGroupName; }
set
{
m_ParentGroupName = value;
}
}
}
public class Option
{
private string m_Value;
public string Value
{
get { return m_Value; }
set
{
m_Value = value;
}
}
}
Then you can use a relative binding so you can look up the control tree to find the right datacontext, so you don't have to copy the ParentGroupName to each child Option instance.
If you name your window, you can traverse the root DataContext.
<Window x:Class="MyNamespace.MainWindow"
Name="Window"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="500" Width="725">
<ListView ItemsSource="{Binding OptionItems}" >
<ListView.ItemTemplate>
<DataTemplate DataType="{x:Type Logging:FilterOptionsRadioListViewModel}">
<RadioButton GroupName="{Binding ElementName=Window, Path=DataContext.ParentGroupName}" Content="{Binding Option.Value}" Tag="{Binding Option.Key}" IsChecked="{Binding IsChecked}" Command="Logging:FilterOptionsRadioListViewModel.CheckedChangedCommand" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>