updated rendering code to only run if text field is non-empty

Adaptive Card Editor UWP.sln

@@ -21,7 +21,9 @@ Global
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|Any CPU.ActiveCfg = Debug|x86
+		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|Any CPU.ActiveCfg = Debug|x64
+		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|Any CPU.Build.0 = Debug|x64
+		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|Any CPU.Deploy.0 = Debug|x64
 		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|ARM.ActiveCfg = Debug|ARM
 		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|ARM.Build.0 = Debug|ARM
 		{E2F5AF78-D3E6-43F9-AF44-F342449B63A5}.Debug|ARM.Deploy.0 = Debug|ARM

Adaptive Card Editor UWP/Adaptive Card Editor UWP.csproj

@@ -12,7 +12,7 @@
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
     <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.18362.0</TargetPlatformVersion>
-    <TargetPlatformMinVersion>10.0.15063.0</TargetPlatformMinVersion>
+    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
@@ -99,6 +99,7 @@
     <UseVSHostingProcess>false</UseVSHostingProcess>
     <ErrorReport>prompt</ErrorReport>
     <Prefer32Bit>true</Prefer32Bit>
+    <UseDotNetNativeToolchain>false</UseDotNetNativeToolchain>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
     <OutputPath>bin\x64\Release\</OutputPath>
@@ -216,6 +217,14 @@
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">
     <VisualStudioVersion>14.0</VisualStudioVersion>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <OutputPath>bin\Debug\</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|AnyCPU'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <OutputPath>bin\Release\</OutputPath>
+  </PropertyGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\WindowsXaml\v$(VisualStudioVersion)\Microsoft.Windows.UI.Xaml.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

Adaptive Card Editor UWP/MainPage.xaml.cs

@@ -142,50 +142,57 @@ namespace Adaptive_Card_Editor_UWP
 
                     // clear the grid of existing content
                     grdCard.Children.Clear();
+                    grdTemplated.Children.Clear();
 
-                    // render an adaptive card
+                    // render the adaptive card content
-                    try
+                    if (txtInput.Text.Length > 0)
                     {
-                        AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
+                        // render an adaptive card
-                        AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(txtInput.Text);
+                        try
-                        RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
+                        {
-                        grdCard.Children.Add(theCard.FrameworkElement);
+                            AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
-                    }
+                            AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(txtInput.Text);
-                    catch (Exception ex)
+                            RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
-                    {
+                            grdCard.Children.Add(theCard.FrameworkElement);
-                        // this means bad data was ingested by the adaptive card renderer
+                        }
-                        // so just display the exception details
+                        catch (Exception ex)
-                        cardOutput.Text = ex.ToString();
+                        {
-                        grdCard.Children.Add(cardOutput);
+                            // this means bad data was ingested by the adaptive card renderer
-                    }
+                            // so just display the exception details
+                            cardOutput.Text = ex.ToString();
+                            grdCard.Children.Add(cardOutput);
+                        }
 
-                    // render a card using template and data
+                        // render a card using template and data
-                    try
+                        try
-                    {
+                        {
-                        string template = txtInput.Text;
+                            string template = txtInput.Text;
-                        string data = txtData.Text;
+                            string data = txtData.Text;
 
-                        string rendered = JsonFromTemplate(template, data);
+                            string rendered = JsonFromTemplate(template, data);
 
-                        // render the card from the rendered template + data
+                            // render the card from the rendered template + data
-                        AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
+                            AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
-                        AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(rendered);
+                            AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(rendered);
-                        RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
+                            RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
-                        grdTemplated.Children.Add(theCard.FrameworkElement);
+                            grdTemplated.Children.Add(theCard.FrameworkElement);
-                    }
+                        }
-                    catch (Exception ex)
+                        catch (Exception ex)
-                    {
+                        {
-                        // render the text as a plain textbox
+                            // render the text as a plain textbox
-                        TextBlock templateOutput = new TextBlock();
+                            TextBlock templateOutput = new TextBlock();
-                        templateOutput.TextWrapping = TextWrapping.Wrap;
+                            templateOutput.TextWrapping = TextWrapping.Wrap;
-                        templateOutput.Padding = new Thickness(10);
+                            templateOutput.Padding = new Thickness(10);
-                        templateOutput.Text = txtInput.Text;
+                            templateOutput.Text = txtInput.Text;
-
+
-                        // this means bad data was ingested by the adaptive card renderer
+                            // this means bad data was ingested by the adaptive card renderer
-                        // so just display the exception details
+                            // so just display the exception details
-                        templateOutput.Text = ex.ToString();
+                            templateOutput.Text = ex.ToString();
-                        grdTemplated.Children.Add(templateOutput);
+                            grdTemplated.Children.Add(templateOutput);
+                        }
                     }
+
+                    // update the XAML layout
                     grdCard.UpdateLayout();
 
                     isRendered = true;