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Listbox, DepedencyProperty, primary questions
Posted on: 13 Dec 2012
Hello, I've started to programming Aplplications in WPF and I have very simple questions, because I don't understand most of courses in the Internet.


1. What is DependencyProperty and how can I use it for example - it is to change parameters in XAML code ?


2. I have some Listboxes and I'd like to add some entires to list by this application - how can I do it ?


XAML:


<Window x:Class="WpfApplication1.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>
<StackPanel x:Name="sp_gridcolumn1" Grid.Column="1">
<ListBox Name="listboks" ItemsSource="{Binding lista}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<TextBlock Text="{Binding imie}" Grid.Column="0"/>
<TextBlock Text="{Binding nazwisko}" Grid.Column="1"/>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Vertical"
Background="Beige">
</StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</StackPanel>
<StackPanel Grid.Column="0" VerticalAlignment="Center" HorizontalAlignment="Center">
<Label>
Imie
</Label>
<TextBox Name="imiee" Margin="0 5" >
</TextBox>
<Label>
Nazwisko
</Label>
<TextBox Name="nazwiskoo" Margin="0 5">
</TextBox>
 <Button Click="add" Height="30" Width="100"> 
Dodaj
</Button>
 <Button Click="remove" Height="30" Width="100" Margin="5"> 
   remove
</Button>
 <Button Click="clear" Height="30" Width="100"> 
  clear 
</Button>
 <Button Click="exit" Height="30" Width="100" Margin="0 10"> 
  exit 
</Button>
</StackPanel>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
</Window>


C# code:




using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
CompositeCollection[] lista = new CompositeCollection[]
{
new CompositeCollection{imie = "Janusz", nazwisko = "Nowak"},
new CompositeCollection{imie = "Jan", nazwisko = "Kowalski"}
};
public MainWindow()
{
InitializeComponent();
listboks.ItemsSource = lista;
}
private void dodaj(object sender, RoutedEventArgs e)
{
if ((imiee.Text != "") && (nazwiskoo.Text != ""))
{
listboks.Items.Add(imiee.Text);
listboks.Items.Add(nazwiskoo.Text);
}
else MessageBox.Show("Podaj imie oraz nazwisko!");
}
 private void clear(object sender, RoutedEventArgs e) 
{
listboks.ItemsSource.GetHashCode();
}
 private void exit(object sender, RoutedEventArgs e) 
{
this.Close();
}
 private void remove(object sender, RoutedEventArgs e) 
{
}
}
class CompositeCollection
{
public string imie
{
get;
set;
}
public string nazwisko
{
get;
set;
}
}
}






Please, give me only simple examples


Thanks. 

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