Add files support

BlazorDemo/App.axaml.cs

@@ -9,7 +9,7 @@ namespace BlazorDemo
 {
     public partial class App : Application
     {
-        public static IInputDialogService? InputDialogService { get; set;}
+        public static IInputDialogService? InputDialogService { get; set; }
  
         public override void Initialize()
         {

BlazorDemo/ViewModels/FileViewModel.cs

@@ -0,0 +1,28 @@
+using ReactiveUI;
+
+namespace BlazorDemo.ViewModels
+{
+    public class FileViewModel : ViewModelBase
+    {
+        private string _name;
+        private string _contents;
+
+        public string Name
+        {
+            get => _name;
+            set => this.RaiseAndSetIfChanged(ref _name, value);
+        }
+
+        public string Contents
+        {
+            get => _contents;
+            set => this.RaiseAndSetIfChanged(ref _contents, value);
+        }
+
+        public FileViewModel(string name, string contents)
+        {
+            _name = name;
+            _contents = contents;
+        }
+    }
+}

BlazorDemo/ViewModels/MainViewModel.cs

@@ -1,11 +1,28 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.ObjectModel;
+using ReactiveUI;
 
 namespace BlazorDemo.ViewModels
 {
     public class MainViewModel : ViewModelBase
     {
-        public string Greeting => "Welcome to Avalonia!";
+        private FileViewModel? _selectedFile;
+        private ObservableCollection<FileViewModel> _files;
+
+        public FileViewModel? SelectedFile
+        {
+            get => _selectedFile;
+            set => this.RaiseAndSetIfChanged(ref _selectedFile, value);
+        }
+
+        public ObservableCollection<FileViewModel> Files
+        {
+            get => _files;
+            set => this.RaiseAndSetIfChanged(ref _files, value);
+        }
+
+        public MainViewModel()
+        {
+            _files = new ObservableCollection<FileViewModel>();
+        }
     }
 }

BlazorDemo/Views/MainView.axaml

@@ -12,29 +12,41 @@
   </Design.DataContext>
 
   <DockPanel>
-    <StackPanel DockPanel.Dock="Left" Spacing="6" Margin="6">
-      <Button Name="buttonSingle" 
-              Content="Open Single File" 
-              HorizontalContentAlignment="Center"
-              HorizontalAlignment="Stretch" 
-              VerticalAlignment="Center" 
-              DockPanel.Dock="Left"/>
-      <Button Name="buttonMultiple" 
-              Content="Open Multiple Files" 
-              HorizontalContentAlignment="Center"
-              HorizontalAlignment="Stretch" 
-              VerticalAlignment="Center" 
-              DockPanel.Dock="Left"/>
-      <Button Name="buttonFolder" 
-              Content="Open Folder" 
-              HorizontalContentAlignment="Center"
-              HorizontalAlignment="Stretch" 
-              VerticalAlignment="Center" 
-              DockPanel.Dock="Left"/>
-    </StackPanel>
-    <TextBox Name="text" 
-             Text=""
+    <DockPanel DockPanel.Dock="Left">
+      <StackPanel DockPanel.Dock="Top" Spacing="6" Margin="6,6,0,6">
+        <Button Name="buttonSingle" 
+                Content="Open Single File" 
+                HorizontalContentAlignment="Center"
+                HorizontalAlignment="Stretch" 
+                VerticalAlignment="Center" 
+                DockPanel.Dock="Left"/>
+        <Button Name="buttonMultiple" 
+                Content="Open Multiple Files" 
+                HorizontalContentAlignment="Center"
+                HorizontalAlignment="Stretch" 
+                VerticalAlignment="Center" 
+                DockPanel.Dock="Left"/>
+        <Button Name="buttonFolder" 
+                Content="Open Folder" 
+                HorizontalContentAlignment="Center"
+                HorizontalAlignment="Stretch" 
+                VerticalAlignment="Center" 
+                DockPanel.Dock="Left"/>
+      </StackPanel>
+      <ListBox Items="{Binding Files}" 
+               SelectedItem="{Binding SelectedFile}"
+               Margin="6,0,0,6">
+        <ListBox.ItemTemplate>
+          <DataTemplate>
+            <TextBlock Text="{Binding Name}" />
+          </DataTemplate>
+        </ListBox.ItemTemplate>
+      </ListBox>
+    </DockPanel>
+
+    <TextBox Text="{Binding SelectedFile.Contents, FallbackValue=''}" 
              Margin="6"/>
+
   </DockPanel>
 
 </UserControl>

BlazorDemo/Views/MainView.axaml.cs

@@ -2,6 +2,7 @@ using System;
 using System.IO;
 using Avalonia.Controls;
 using BlazorDemo.Dialogs;
+using BlazorDemo.ViewModels;
 
 namespace BlazorDemo.Views
 {
@@ -74,12 +75,14 @@ namespace BlazorDemo.Views
 
         private void Callback(Stream stream, string name)
         {
-            if (text is { })
+            if (DataContext is MainViewModel viewModel)
             {
                 Console.WriteLine($"Callback(): {name}");
                 using var reader = new StreamReader(stream);
-                var str = reader.ReadToEnd();
-                text.Text = str;
+                var contents = reader.ReadToEnd();
+                var file = new FileViewModel(name, contents);
+                viewModel.Files.Add(file);
+                viewModel.SelectedFile = file;
             }
         }
     }