new feature: auto-render Adaptive Card output from inputted JSON with basic error trapping for bad JSON

Adaptive Card Editor UWP/Adaptive Card Editor UWP.csproj

@@ -150,6 +150,12 @@
     </Page>
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="AdaptiveCards">
+      <Version>1.2.4</Version>
+    </PackageReference>
+    <PackageReference Include="AdaptiveCards.Rendering.Uwp">
+      <Version>1.2.5</Version>
+    </PackageReference>
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform">
       <Version>6.2.9</Version>
     </PackageReference>

Adaptive Card Editor UWP/MainPage.xaml

@@ -8,7 +8,35 @@
     mc:Ignorable="d"
     Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
 
-    <Grid>
+    <Grid Padding="40">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="33*" />
+            <ColumnDefinition Width="33*" />
+            <ColumnDefinition Width="33*" />
+        </Grid.ColumnDefinitions>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="20" />
+            <RowDefinition Height="*" />
+        </Grid.RowDefinitions>
+        <TextBlock Grid.Row="0" Grid.Column="0">
+            Adaptive Card JSON Input:
+        </TextBlock>
+        <TextBlock Grid.Row="0" Grid.Column="1">
+            Rendered Output (UWP Library):
+        </TextBlock>
+        <TextBlock Grid.Row="0" Grid.Column="2">
+            Rendered Output (Template Library):
+        </TextBlock>
+        <TextBox Grid.Row="1" Grid.Column="0" x:Name="txtInput" Margin="20" KeyUp="txtInput_KeyUp" TextWrapping="Wrap"></TextBox>
+        <Border Grid.Row="1" BorderBrush="#777" BorderThickness="1" Grid.Column="1" Margin="20">
+            <Grid x:Name="grdCard">
 
+            </Grid>
+        </Border>
+        <Border Grid.Row="1" BorderBrush="#777" BorderThickness="1" Grid.Column="2" Margin="20">
+            <Grid x:Name="grdTemplated">
+
+            </Grid>
+        </Border>
     </Grid>
 </Page>

Adaptive Card Editor UWP/MainPage.xaml.cs

@@ -12,6 +12,8 @@ using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Media;
 using Windows.UI.Xaml.Navigation;
+using AdaptiveCards.Rendering.Uwp;
+using System.Threading.Tasks;
 
 // The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
 
@@ -22,9 +24,81 @@ namespace Adaptive_Card_Editor_UWP
     /// </summary>
     public sealed partial class MainPage : Page
     {
+        public DispatcherTimer keyTimer = new DispatcherTimer();
+
+        public long lastKeyUp;
+
+        public bool isRendered;
+
+        public long interval = 5000000;
+
         public MainPage()
         {
+            TimerSetup();
             this.InitializeComponent();
         }
+
+        public void TimerSetup()
+        {
+            keyTimer.Tick += TimerTick;
+            // keyTimer.Interval = new TimeSpan(0, 0, 1);
+            keyTimer.Interval = TimeSpan.Parse("00:00:00.05");
+            keyTimer.Start();
+        }
+
+        private void txtInput_KeyUp(object sender, KeyRoutedEventArgs e)
+        {
+            // last key up event = integer value of current time
+            lastKeyUp = DateTime.Now.Ticks;
+
+            // user is inputting text, so we're going to rerender
+            isRendered = false;
+        }
+
+        void TimerTick(object sender, object args)
+        {
+            if (isRendered)
+            {
+                return;
+            }
+            else
+            {
+                if (DateTime.Now.Ticks >= lastKeyUp + interval )
+                {
+                    // we done got some input! let's render it.
+                    // we don't care what the input is; if it's not valid JSON ignore this keystroke
+
+                    // render the text as a plain textbox
+                    TextBlock txtOutput = new TextBlock();
+                    txtOutput.TextWrapping = TextWrapping.Wrap;
+                    txtOutput.Padding = new Thickness(10);
+                    txtOutput.Text = txtInput.Text;
+
+                    // clear the grid of existing content
+                    grdCard.Children.Clear();
+
+                    // render an adaptive card
+                    try
+                    {
+                        AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
+                        AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(txtInput.Text);
+                        RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
+                        grdCard.Children.Add(theCard.FrameworkElement);
+                    }
+                    catch (Exception ex)
+                    {
+                        txtOutput.Text = ex.ToString();
+                        grdCard.Children.Add(txtOutput);
+                    }
+                    grdCard.UpdateLayout();
+
+                    isRendered = true;
+                }
+                else
+                {
+                    return;
+                }
+            }
+        }
     }
 }