BitmapMetadata.cpp

//BitmapMetadata.cpp file

usingnamespaceSystem;
usingnamespaceSystem::IO;
usingnamespaceSystem::Windows;
usingnamespaceSystem::Windows::Controls;
usingnamespaceSystem::Windows::Media;
usingnamespaceSystem::Windows::Media::Imaging;
usingnamespaceSystem::Threading;
usingnamespaceSystem::Security;


namespaceSDKSample {

 public ref classapp : Application {

private: Window^ mainWindow;

protected:virtualvoidOnStartup (StartupEventArgs^ e) override
 {
Application::OnStartup(e);
CreateAndShowMainWindow();
 };

private:voidCreateAndShowMainWindow ()
 {

// Create the application's main window
 mainWindow = gcnew Window();
 mainWindow->Title = "Image Metadata";

// <SnippetSetQuery>
 Stream^ pngStream = gcnew FileStream("smiley.png", FileMode::Open, FileAccess::ReadWrite, FileShare::ReadWrite);
 PngBitmapDecoder^ pngDecoder = gcnew PngBitmapDecoder(pngStream, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
 BitmapFrame^ pngFrame = pngDecoder->Frames[0];
 InPlaceBitmapMetadataWriter^ pngInplace = pngFrame->CreateInPlaceBitmapMetadataWriter();
if (pngInplace->TrySave())
 {
 pngInplace->SetQuery("/Text/Description", "Have a nice day.");
 }
 pngStream->Close();
// </SnippetSetQuery>

// Draw the Image
 Image^ myImage = gcnew Image();
 myImage->Source = gcnew BitmapImage(gcnew System::Uri("smiley.png", UriKind::Relative));
 myImage->Stretch = Stretch::None;
 myImage->Margin = System::Windows::Thickness(20);

// <SnippetGetQuery>

// Add the metadata of the bitmap image to the text block.
 TextBlock^ myTextBlock = gcnew TextBlock();
 myTextBlock->Text = "The Description metadata of this image is: " + pngInplace->GetQuery("/Text/Description")->ToString();
// </SnippetGetQuery>

// Define a StackPanel to host Controls
 StackPanel^ myStackPanel = gcnew StackPanel();
 myStackPanel->Orientation = Orientation::Vertical;
 myStackPanel->Height = 200;
 myStackPanel->VerticalAlignment = VerticalAlignment::Top;
 myStackPanel->HorizontalAlignment = HorizontalAlignment::Center;

// Add the Image and TextBlock to the parent Grid
 myStackPanel->Children->Add(myImage);
 myStackPanel->Children->Add(myTextBlock);

// Add the StackPanel as the Content of the Parent Window Object
 mainWindow->Content = myStackPanel;
 mainWindow->Show();
 };
 };

// Define a static entry class
 private ref classEntryClass {

public:
 [System::STAThread()]
staticvoidMain () 
 {
 SDKSample::app^ app = gcnew SDKSample::app();
 app->Run();
 };
 };
}

//Entry Point:
[System::STAThreadAttribute()]
voidmain ()
{
returnSDKSample::EntryClass::Main();
}