How to programmatically create a DataTemplate in C# WPF (not using XAML)?

Question

WPF

Actually the question has already been raised. You need to create something like this in code

<ListBoxItem>
                <DataTemplate>
                    <Label></Label>
                    <Label></Label>
                </DataTemplate>
            </ListBoxItem>

Let me explain. There is a ListBox, you need to programmatically create Items in which there will be several elements, the name of the machine and its model, for example. Couldn't find anything meaningful. Please advise knowledgeable people. I know English very badly.

Answer 1

Creating a DataTemplate from code is a very bad idea. Firstly, it is relatively difficult, secondly, any flexibility of declarative markup is lost, and thirdly, part of the functionality of templates is lost. Yes, and the bindings in the code to create such a thing are just overkill ...
Here is a normal approach: You bind the ItemsSource of the listbox to the ObservableCollection; create a DataTemplate in resources

<Window x:Class="listbox.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:someData="clr-namespace:listbox"  
        
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>        
        <DataTemplate x:Key="CarItemTemplate" DataType="{x:Type someData:SomeData}">
            <Border Background="DeepSkyBlue" Width="200" Margin="3" CornerRadius="4">
                <Grid>
                    <TextBlock Text="{Binding Name}" Foreground="White" FontSize="16" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="30"/>
                    <TextBlock Text="{Binding Count}" Foreground="White"  HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="3"/>
                </Grid>
            </Border>
        </DataTemplate>
    </Window.Resources>
    <Grid>
        <ListBox x:Name="lisbox" DataContext="{Binding}" ItemsSource="{Binding CarCollection}" ItemTemplate="{StaticResource CarItemTemplate}"></ListBox>
    </Grid>
</Window>

and here is the behind code:

namespace listbox
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public ObservableCollection<SomeData> CarCollection { get; set; }
        public MainWindow()
        {
            InitializeComponent();
            CarCollection = new ObservableCollection<SomeData>{
                new SomeData{Name="BMW", Count=20},
                new SomeData{Name="Mercedess", Count=30},
                new SomeData{Name="Таврия", Count=200}
            };
            DataContext = this;
        }
    }

    public class SomeData
    {
        public string Name { get; set; }
        public int Count { get; set; }

    }
}

Answer 2

Okay, but how then to implement what you need? There, all you need is that in one item there was a car brand, model and its photo. I don't know how many cars there are. How to proceed in such a case?