Flow.PDFView

Flow.PDFView is a cross-platform .NET MAUI PDF control supporting Android, iOS, MacCatalyst (Windows is still a basic implementation).

Core Capabilities

• Native PDF rendering (not WebView)
• Multiple data source loading: Uri / Local File / Asset / Byte Array / Stream
• Page control: Zoom, Swipe direction, Display mode, Jump to page
• Events: Document loaded, Page changed, Error, Tap, Link tap
• Search API (Unified entry)
  • SearchAsync
  • GoToSearchResult
  • ClearSearch
  • HighlightSearchResults
  • SearchResultsFound / SearchProgress

Platform Feature Matrix

Feature	Android	iOS	MacCatalyst	Windows
Basic rendering/Page turn/Zoom	✅	✅	✅	✅
Unified Search API	✅	✅	✅	✅
Search result navigation	✅	✅	✅	✅
Search result highlighting	✅	✅	✅	✅

Repository Structure

FlowPDFView/
├── FlowPDFView/ # Core MAUI control library
├── FlowPDFView.Android.Binding/ # Android native binding layer
├── BlazePdfium/ # Android PDF engine source code & build
└── ExampleMauiApp/ # Demo application

Local Integration (ProjectReference)

In your MAUI project, directly reference the local library project:

<ItemGroup>
  <ProjectReference Include="..\FlowPDFView\Flow.PDFView.csproj" />
</ItemGroup>

And register it in MauiProgram.cs:

builder
  .UseMauiApp<App>()
  .UseMauiPdfView();

Local Android Dependency (BlazePdfium)

If you modify the BlazePdfium version or source code, please rebuild and ensure the binding project uses the latest artifacts:

1. Execute ./gradlew buildAll in the BlazePdfium/ directory.
2. This task will automatically clean old Blaze AARs, copy the new AAR to FlowPDFView.Android.Binding/Jars/, and complete verification.
3. Rebuild:

cd BlazePdfium
./gradlew buildAll
cd ..
dotnet build ExampleMauiApp/ExampleMauiApp.csproj -f net10.0-android

Quick Usage

<pdf:PdfView x:Name="PdfViewer" EnableZoom="True" EnableSwipe="True" DisplayMode="SinglePageContinuous" ScrollOrientation="Vertical" />

PdfViewer.Source = new UriPdfSource(new Uri(""));
PdfViewer.GoToPage(3);
var results = await PdfViewer.SearchAsync("pdf", new PdfSearchOptions { Highlight = true, SearchAllPages = true, MaxResults = 200 });
if (results.Count > 0)
{
    PdfViewer.GoToSearchResult(0);
}

Demo Application

Please refer to ExampleMauiApp/README.md:

• URL / Local file loading
• Page turn and Zoom
• Search + Previous/Next result navigation
• Toolbar overlay interaction

Build Verification (This Repository)

dotnet build FlowPDFView/Flow.PDFView.csproj -f net10.0-android
dotnet build FlowPDFView/Flow.PDFView.csproj -f net10.0-ios
dotnet build FlowPDFView/Flow.PDFView.csproj -f net10.0-maccatalyst
dotnet build ExampleMauiApp/ExampleMauiApp.csproj -f net10.0-android