Working with Text Search in .NET MAUI PDF Viewer

TextSearch/TextSearch.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35707.178 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TextSearch", "TextSearch\TextSearch.csproj", "{F4638210-0C15-45E5-A02B-1576688E5569}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F4638210-0C15-45E5-A02B-1576688E5569}.Release|Any CPU.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

TextSearch/TextSearch/App.xaml

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+<?xml version = "1.0" encoding = "UTF-8" ?>
+<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:TextSearch"
+             x:Class="TextSearch.App">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Resources/Styles/Colors.xaml" />
+                <ResourceDictionary Source="Resources/Styles/Styles.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

TextSearch/TextSearch/App.xaml.cs

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+namespace TextSearch
+{
+    public partial class App : Application
+    {
+        public App()
+        {
+            InitializeComponent();
+
+            MainPage = new AppShell();
+        }
+    }
+}

TextSearch/TextSearch/AppShell.xaml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<Shell
+    x:Class="TextSearch.AppShell"
+    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:local="clr-namespace:TextSearch"
+    Shell.FlyoutBehavior="Disabled"
+    Title="TextSearch">
+
+    <ShellContent
+        Title="Home"
+        ContentTemplate="{DataTemplate local:MainPage}"
+        Route="MainPage" />
+
+</Shell>

TextSearch/TextSearch/AppShell.xaml.cs

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+namespace TextSearch
+{
+    public partial class AppShell : Shell
+    {
+        public AppShell()
+        {
+            InitializeComponent();
+        }
+    }
+}

TextSearch/TextSearch/MainPage.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:syncfusion="clr-namespace:Syncfusion.Maui.PdfViewer;assembly=Syncfusion.Maui.PdfViewer"
+             x:Class="TextSearch.MainPage">
+
+    <ContentPage.Content>
+        <Grid>
+            <!-- Define two rows: One for toolbar and one for PDF viewer -->
+            <Grid.RowDefinitions>
+                <RowDefinition Height="40"/>
+                <!-- Toolbar row -->
+                <RowDefinition Height="*"/>
+                <!-- PDF viewer row -->
+            </Grid.RowDefinitions>
+
+            <!-- Toolbar: Contains title and buttons for search actions -->
+            <ScrollView Orientation="Horizontal" HorizontalScrollBarVisibility="Never">
+                <Grid ColumnDefinitions="Auto, *">
+                    <!-- Title Label on the Left -->
+                    <Label Text="PDF Viewer" FontSize="16" VerticalOptions="Center" Grid.Column="0"/>
+
+                    <!-- Button Container with Spacing -->
+                    <HorizontalStackLayout Grid.Column="1" Spacing="10" HorizontalOptions="End" Padding="0,0,15,0">
+                        <Button Text="&#xE715;" FontFamily="MauiMaterialAssets" Clicked="SearchButtonClicked"/>
+                        <!-- Starts search -->
+                        <Button Text="&#xE707;" FontFamily="MauiMaterialAssets" Clicked="PreviousMatchButtonClicked"/>
+                        <!-- Moves to previous match -->
+                        <Button Text="&#xE706;" FontFamily="MauiMaterialAssets" Clicked="NextMatchButtonClicked"/>
+                        <!-- Moves to next match -->
+                        <Button Text="&#xE70B;" FontFamily="MauiMaterialAssets" Clicked="CloseSearchButtonClicked"/>
+                        <!-- Clears search results -->
+                    </HorizontalStackLayout>
+                </Grid>
+            </ScrollView>
+
+            <!-- PDF Viewer Component -->
+            <syncfusion:SfPdfViewer x:Name="PdfViewer" ShowToolbars="False" Grid.Row="1"/>
+        </Grid>
+    </ContentPage.Content>
+</ContentPage>

TextSearch/TextSearch/MainPage.xaml.cs

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+using Syncfusion.Maui.PdfViewer;
+using System.Reflection;
+
+namespace TextSearch
+{
+    public partial class MainPage : ContentPage
+    {
+        // Stores the search results to enable navigation and clearing.
+        TextSearchResult? SearchResult;
+
+        public MainPage()
+        {
+            InitializeComponent();
+
+            // Load the PDF document from embedded resources.
+            Stream? stream = typeof(MainPage).GetTypeInfo().Assembly.GetManifestResourceStream("TextSearch.Assets.PDF_Succinctly.pdf");
+            PdfViewer.LoadDocument(stream!);
+
+            // Customize the highlight colors for search results.
+            PdfViewer.TextSearchSettings.CurrentMatchHighlightColor = Color.FromRgba("#8F00FF43"); // Highlight color for the current match.
+            PdfViewer.TextSearchSettings.OtherMatchesHighlightColor = Color.FromRgba("#00FF0043");  // Highlight color for other matches.
+        }
+
+        // Initiates a text search when the search button is clicked.
+        private void SearchButtonClicked(object sender, EventArgs e)
+        {
+            SearchText("the");
+        }
+
+        // Searches for the specified text asynchronously and stores the result.
+        async void SearchText(string text)
+        {
+            SearchResult = await PdfViewer.SearchTextAsync(text);
+        }
+
+        // Moves to the next match when the next button is clicked.
+        private void NextMatchButtonClicked(object sender, EventArgs e)
+        {
+            SearchResult?.GoToNextMatch();
+        }
+
+        // Moves to the previous match when the previous button is clicked.
+        private void PreviousMatchButtonClicked(object sender, EventArgs e)
+        {
+            SearchResult?.GoToPreviousMatch();
+        }
+
+        // Clears the search highlights and resets the search state.
+        private void CloseSearchButtonClicked(object sender, EventArgs e)
+        {
+            SearchResult?.Clear();
+        }
+    }
+}

TextSearch/TextSearch/MauiProgram.cs

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+using Microsoft.Extensions.Logging;
+using Syncfusion.Maui.Core.Hosting;
+
+namespace TextSearch
+{
+    public static class MauiProgram
+    {
+        public static MauiApp CreateMauiApp()
+        {
+            var builder = MauiApp.CreateBuilder();
+            builder
+                .UseMauiApp<App>()
+                .ConfigureFonts(fonts =>
+                {
+                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
+                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
+                });
+
+            builder.ConfigureSyncfusionCore();
+
+            Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("MDAxQDMyMzgyZTMwMmUzMGFMV081MVlpVnJ5aHJyQzUzMFFBOUJwZ1B0YWkxNC80WnA3SHdvbmdqNzA9");
+
+#if DEBUG
+            builder.Logging.AddDebug();
+#endif
+
+            return builder.Build();
+        }
+    }
+}

TextSearch/TextSearch/Platforms/Android/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+	<application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:supportsRtl="true"></application>
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<uses-permission android:name="android.permission.INTERNET" />
+</manifest>

TextSearch/TextSearch/Platforms/Android/MainActivity.cs

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+using Android.App;
+using Android.Content.PM;
+using Android.OS;
+
+namespace TextSearch
+{
+    [Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, LaunchMode = LaunchMode.SingleTop, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
+    public class MainActivity : MauiAppCompatActivity
+    {
+    }
+}

TextSearch/TextSearch/Platforms/Android/MainApplication.cs

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+using Android.App;
+using Android.Runtime;
+
+namespace TextSearch
+{
+    [Application]
+    public class MainApplication : MauiApplication
+    {
+        public MainApplication(IntPtr handle, JniHandleOwnership ownership)
+            : base(handle, ownership)
+        {
+        }
+
+        protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    }
+}

TextSearch/TextSearch/Platforms/Android/Resources/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#512BD4</color>
+    <color name="colorPrimaryDark">#2B0B98</color>
+    <color name="colorAccent">#2B0B98</color>
+</resources>

TextSearch/TextSearch/Platforms/MacCatalyst/AppDelegate.cs

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+using Foundation;
+
+namespace TextSearch
+{
+    [Register("AppDelegate")]
+    public class AppDelegate : MauiUIApplicationDelegate
+    {
+        protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    }
+}

TextSearch/TextSearch/Platforms/MacCatalyst/Entitlements.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+    <!-- See https://aka.ms/maui-publish-app-store#add-entitlements for more information about adding entitlements.-->
+    <dict>
+        <!-- App Sandbox must be enabled to distribute a MacCatalyst app through the Mac App Store. -->
+        <key>com.apple.security.app-sandbox</key>
+        <true/>
+        <!-- When App Sandbox is enabled, this value is required to open outgoing network connections. -->
+        <key>com.apple.security.network.client</key>
+        <true/>
+    </dict>
+</plist>
+

TextSearch/TextSearch/Platforms/MacCatalyst/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <!-- The Mac App Store requires you specify if the app uses encryption. -->
+    <!-- Please consult https://developer.apple.com/documentation/bundleresources/information_property_list/itsappusesnonexemptencryption -->
+    <!-- <key>ITSAppUsesNonExemptEncryption</key> -->
+    <!-- Please indicate <true/> or <false/> here. -->
+
+    <!-- Specify the category for your app here. -->
+    <!-- Please consult https://developer.apple.com/documentation/bundleresources/information_property_list/lsapplicationcategorytype -->
+    <!-- <key>LSApplicationCategoryType</key> -->
+    <!-- <string>public.app-category.YOUR-CATEGORY-HERE</string> -->
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>2</integer>
+	</array>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>XSAppIconAssets</key>
+	<string>Assets.xcassets/appicon.appiconset</string>
+</dict>
+</plist>

TextSearch/TextSearch/Platforms/MacCatalyst/Program.cs

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+using ObjCRuntime;
+using UIKit;
+
+namespace TextSearch
+{
+    public class Program
+    {
+        // This is the main entry point of the application.
+        static void Main(string[] args)
+        {
+            // if you want to use a different Application Delegate class from "AppDelegate"
+            // you can specify it here.
+            UIApplication.Main(args, null, typeof(AppDelegate));
+        }
+    }
+}

TextSearch/TextSearch/Platforms/Tizen/Main.cs

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+using System;
+using Microsoft.Maui;
+using Microsoft.Maui.Hosting;
+
+namespace TextSearch
+{
+    internal class Program : MauiApplication
+    {
+        protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+
+        static void Main(string[] args)
+        {
+            var app = new Program();
+            app.Run(args);
+        }
+    }
+}

TextSearch/TextSearch/Platforms/Tizen/tizen-manifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="maui-application-id-placeholder" version="0.0.0" api-version="8" xmlns="http://tizen.org/ns/packages">
+  <profile name="common" />
+  <ui-application appid="maui-application-id-placeholder" exec="TextSearch.dll" multiple="false" nodisplay="false" taskmanage="true" type="dotnet" launch_mode="single">
+    <label>maui-application-title-placeholder</label>
+    <icon>maui-appicon-placeholder</icon>
+    <metadata key="http://tizen.org/metadata/prefer_dotnet_aot" value="true" />
+  </ui-application>
+  <shortcut-list />
+  <privileges>
+    <privilege>http://tizen.org/privilege/internet</privilege>
+  </privileges> 
+  <dependencies />
+  <provides-appdefined-privileges />
+</manifest>

TextSearch/TextSearch/Platforms/Windows/App.xaml

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+<maui:MauiWinUIApplication
+    x:Class="TextSearch.WinUI.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:maui="using:Microsoft.Maui"
+    xmlns:local="using:TextSearch.WinUI">
+
+</maui:MauiWinUIApplication>