UpdateThumbnail

UpdateThumbnail(ThumbnailGeneratingOptions)

Updates Thumbnail of the document according to the specified options.

public void UpdateThumbnail(ThumbnailGeneratingOptions options)
Parameter Type Description
options ThumbnailGeneratingOptions The generating options to use.

Remarks

The ThumbnailGeneratingOptions allows you to specify the source of thumbnail, size and other options. If attempt to generate thumbnail fails, doesn’t change one.

Examples

Shows how to update a document’s thumbnail.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

builder.Writeln("Hello world!");
builder.InsertImage(ImageDir + "Logo.jpg");

// There are two ways of setting a thumbnail image when saving a document to .epub.
// 1 -  Use the document's first page:
doc.UpdateThumbnail();
doc.Save(ArtifactsDir + "Document.UpdateThumbnail.FirstPage.epub");

// 2 -  Use the first image found in the document:
ThumbnailGeneratingOptions options = new ThumbnailGeneratingOptions();
options.ThumbnailSize = new Size(400, 400);
options.GenerateFromFirstPage = false;

doc.UpdateThumbnail(options);
doc.Save(ArtifactsDir + "Document.UpdateThumbnail.FirstImage.epub");

See Also


UpdateThumbnail()

Updates Thumbnail of the document using default options.

public void UpdateThumbnail()

Examples

Shows how to update a document’s thumbnail.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

builder.Writeln("Hello world!");
builder.InsertImage(ImageDir + "Logo.jpg");

// There are two ways of setting a thumbnail image when saving a document to .epub.
// 1 -  Use the document's first page:
doc.UpdateThumbnail();
doc.Save(ArtifactsDir + "Document.UpdateThumbnail.FirstPage.epub");

// 2 -  Use the first image found in the document:
ThumbnailGeneratingOptions options = new ThumbnailGeneratingOptions();
options.ThumbnailSize = new Size(400, 400);
options.GenerateFromFirstPage = false;

doc.UpdateThumbnail(options);
doc.Save(ArtifactsDir + "Document.UpdateThumbnail.FirstImage.epub");

See Also