Added message dialogs

WindowsAppSDKGallery/DataModel/SampleInfoDataSource.cs

@@ -89,6 +89,19 @@ public sealed class SampleInfoDataSource
                 }
             },
 
+            new SampleInfoDataGroup
+            {
+                Title = "Dialogs",
+                Items =
+                {
+                    new SampleInfoDataItem
+                    {
+                        Title = "MessageDialog",
+                        PageType = typeof(SamplePages.DialogSamples.MessageDialogPage)
+                    }
+                }
+            },
+
             new SampleInfoDataGroup
             {
                 Title = "App lifecycle",

WindowsAppSDKGallery/SamplePages/DialogSamples/MessageDialogPage.xaml

@@ -0,0 +1,27 @@
+<Page
+    x:Class="WindowsAppSDKGallery.SamplePages.DialogSamples.MessageDialogPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:WindowsAppSDKGallery.SamplePages.DialogSamples"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:controls="using:WindowsAppSDKGallery.Controls"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    <StackPanel>
+
+        <controls:ApiExample
+            HeaderText="Content-only dialog"
+            x:Name="ContentOnly"
+            Api="new MessageDialog($content).ShowAsync();"
+            ExecuteApi="ContentOnly_ExecuteApi"/>
+
+        <controls:ApiExample
+            HeaderText="Title and content dialog"
+            x:Name="TitleAndContent"
+            Api="new MessageDialog($content, $title).ShowAsync();"
+            ExecuteApi="TitleAndContent_ExecuteApi"/>
+
+    </StackPanel>
+</Page>

WindowsAppSDKGallery/SamplePages/DialogSamples/MessageDialogPage.xaml.cs

@@ -0,0 +1,62 @@
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Controls.Primitives;
+using Microsoft.UI.Xaml.Data;
+using Microsoft.UI.Xaml.Input;
+using Microsoft.UI.Xaml.Media;
+using Microsoft.UI.Xaml.Navigation;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Popups;
+using WindowsAppSDKGallery.Helpers;
+
+// To learn more about WinUI, the WinUI project structure,
+// and more about our project templates, see: http://aka.ms/winui-project-info.
+
+namespace WindowsAppSDKGallery.SamplePages.DialogSamples
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    public sealed partial class MessageDialogPage : Page
+    {
+        public MessageDialogPage()
+        {
+            this.InitializeComponent();
+        }
+
+        /// <summary>
+        /// Sets the HWND for the dialog so it can be displayed.
+        /// </summary>
+        /// <param name="dialog"></param>
+        /// <returns></returns>
+        private MessageDialog InitWindow(MessageDialog dialog)
+        {
+            WinRT.Interop.InitializeWithWindow.Initialize(dialog, WindowHelper.GetHwndForCurrentWindow());
+            return dialog;
+        }
+
+        private async void ContentOnly_ExecuteApi(object sender, Controls.ExecuteApiArgs e)
+        {
+            ContentOnly.IsEnabled = false;
+
+            await InitWindow(new MessageDialog(e.Parameters["content"])).ShowAsync();
+
+            ContentOnly.IsEnabled = true;
+        }
+
+        private async void TitleAndContent_ExecuteApi(object sender, Controls.ExecuteApiArgs e)
+        {
+            TitleAndContent.IsEnabled = false;
+
+            await InitWindow(new MessageDialog(e.Parameters["content"], e.Parameters["title"])).ShowAsync();
+
+            TitleAndContent.IsEnabled = true;
+        }
+    }
+}

WindowsAppSDKGallery/WindowsAppSDKGallery.csproj

@@ -37,6 +37,7 @@
     <None Remove="SamplePages\AppLifecycle\PowerManagerPage.xaml" />
     <None Remove="SamplePages\AppWindowSamples\BasicAppWindowSamples.xaml" />
     <None Remove="SamplePages\AuthSamples\CredentialLockerPage.xaml" />
+    <None Remove="SamplePages\DialogSamples\MessageDialogPage.xaml" />
     <None Remove="SamplePages\MediaSamples\PlaySoundsPage.xaml" />
     <None Remove="SamplePages\MediaSamples\PlayVideosPage.xaml" />
     <None Remove="SamplePages\ShareSamples\DataTransferManagerPage.xaml" />
@@ -162,4 +163,10 @@
       <Generator>MSBuild:Compile</Generator>
     </Page>
   </ItemGroup>
+
+  <ItemGroup>
+    <Page Update="SamplePages\DialogSamples\MessageDialogPage.xaml">
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
 </Project>