GenerateFromFirstPage

ThumbnailGeneratingOptions.GenerateFromFirstPage property

Specifies whether to generate thumbnail from first page of the document or first image.

public bool GenerateFromFirstPage { get; set; }

Remarks

Default is true, which means thumbnail will be generated from first page of the document. If value is false and there is no image in the document, thumbnail will be generated from first page of the document.

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

ThumbnailGeneratingOptions ThumbnailGeneratingOptions.ThumbnailSize