StackOverflow2013

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2012-12-31T02:01:28.473
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2012-12-31T02:01:28.473
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Are you using <code>ObservableCollection</code> and does your model implement <code>INotifyPropertyChanged</code> these two things will automaticly update the ListBox on any change. no need to explicitly refresh the list. Here is a small example of using <code>ObservableCollection</code> and <code>INotifyPropertyChanged</code>, obviously you will populate your ObservableCollection from your <code>SQL</code> database. Window: <pre><code>public partial class MainWindow : Window, INotifyPropertyChanged { private ObservableCollection<MyModel> _list = new ObservableCollection<MyModel>(); private MyModel _selectedModel; public MainWindow() { InitializeComponent(); List.Add(new MyModel { Name = "James", CompanyName = "StackOverflow"}); List.Add(new MyModel { Name = "Adam", CompanyName = "StackOverflow" }); List.Add(new MyModel { Name = "Chris", CompanyName = "StackOverflow" }); List.Add(new MyModel { Name = "Steve", CompanyName = "StackOverflow" }); List.Add(new MyModel { Name = "Brent", CompanyName = "StackOverflow" }); } public ObservableCollection<MyModel> List { get { return _list; } set { _list = value; } } public MyModel SelectedModel { get { return _selectedModel; } set { _selectedModel = value; NotifyPropertyChanged("SelectedModel"); } } public event PropertyChangedEventHandler PropertyChanged; private void NotifyPropertyChanged(string property) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(property)); } } } </code></pre> Xaml <pre><code><Window x:Class="WpfApplication11.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" Name="UI"> <Grid> <ListBox ItemsSource="{Binding ElementName=UI, Path=List}" SelectedItem="{Binding ElementName=UI, Path=SelectedModel}" Margin="0,0,200,0" DisplayMemberPath="DisplayMember" SelectedIndex="0" /> <StackPanel HorizontalAlignment="Left" Height="100" Margin="322,10,0,0" VerticalAlignment="Top" Width="185"> <TextBlock Text="Name" /> <TextBox Height="23" TextWrapping="Wrap" Text="{Binding ElementName=UI, Path=SelectedModel.Name, UpdateSourceTrigger=PropertyChanged}" /> <TextBlock Text="Company Name" /> <TextBox Height="23" TextWrapping="Wrap" Text="{Binding ElementName=UI, Path=SelectedModel.CompanyName, UpdateSourceTrigger=PropertyChanged}" /> </StackPanel> </Grid> </Window> </code></pre> Model <pre><code>public class MyModel : INotifyPropertyChanged { private string _name; private string _companyName; public string Name { get { return _name; } set { _name = value; NotifyPropertyChanged("Name"); } } public string CompanyName { get { return _companyName; } set { _companyName = value; NotifyPropertyChanged("CompanyName"); } } public string DisplayMember { get { return string.Format("{0} ({1})", Name, CompanyName); } } public event PropertyChangedEventHandler PropertyChanged; private void NotifyPropertyChanged(string property) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(property)); PropertyChanged(this, new PropertyChangedEventArgs("DisplayMember")); } } } </code></pre> In this case any edit to properties will Update your list instantly, also will update when new Items are added/removed. <img src="https://i.stack.imgur.com/24XPJ.png" alt="enter image description here">
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1. POEASY way to refresh ListBox in WPF?
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