public void Thumbnail()
{
//ExStart
//ExFor:BuiltInDocumentProperties.Thumbnail
//ExFor:DocumentProperty.ToByteArray
//ExSummary:Shows how to add a thumbnail to a document that we save as an Epub.
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Writeln("Hello world!");
// If we save a document, whose "Thumbnail" property contains image data that we added, as an Epub,
// a reader that opens that document may display the image before the first page.
BuiltInDocumentProperties properties = doc.BuiltInDocumentProperties;
byte[] thumbnailBytes = File.ReadAllBytes(ImageDir + "Logo.jpg");
properties.Thumbnail = thumbnailBytes;
doc.Save(ArtifactsDir + "DocumentProperties.Thumbnail.epub");
// We can extract a document's thumbnail image and save it to the local file system.
DocumentProperty thumbnail = doc.BuiltInDocumentProperties["Thumbnail"];
File.WriteAllBytes(ArtifactsDir + "DocumentProperties.Thumbnail.gif", thumbnail.ToByteArray());
//ExEnd
using (FileStream imgStream = new FileStream(ArtifactsDir + "DocumentProperties.Thumbnail.gif", FileMode.Open))
{
TestUtil.VerifyImage(400, 400, imgStream);
}
}
public void Thumbnail()
{
//ExStart
//ExFor:BuiltInDocumentProperties.Thumbnail
//ExFor:DocumentProperty.ToByteArray
//ExSummary:Shows how to append a thumbnail to an Epub document.
// Create a blank document and add some text with a DocumentBuilder
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Writeln("Hello world!");
// The thumbnail property resides in a document's built in properties, but is used exclusively by Epub e-book documents
BuiltInDocumentProperties properties = doc.BuiltInDocumentProperties;
// Load an image from our file system into a byte array
byte[] thumbnailBytes = File.ReadAllBytes(ImageDir + "Logo.jpg");
// Set the value of the Thumbnail property to the array from above
properties.Thumbnail = thumbnailBytes;
// Our thumbnail should be visible at the start of the document, before the text we added
doc.Save(ArtifactsDir + "Properties.Thumbnail.epub");
// We can also extract a thumbnail property into a byte array and then into the local file system like this
DocumentProperty thumbnail = doc.BuiltInDocumentProperties["Thumbnail"];
File.WriteAllBytes(ArtifactsDir + "Properties.Thumbnail.gif", thumbnail.ToByteArray());
//ExEnd
using (FileStream imgStream = new FileStream(ArtifactsDir + "Properties.Thumbnail.gif", FileMode.Open))
{
TestUtil.VerifyImage(400, 400, imgStream);
}
}
