Handle loading of external resources documents Leave feedback
GroupDocs.Parser provides the functionality to handle loading of HTML external resources.
Here are the steps to handle loading of HTML external resources.
- Instantiate the ParserSettings object and pass External Resource Handler;
- Create Parser object and call GetImages method.
The following code sample shows how to handle loading of HTML external resources.
// Create an instance of ParserSettings to pass External Resource Handler
ParserSettings settings = new ParserSettings(new Handler());
// Create an instance of Parser class to generate spreadsheet page previews
using (Parser parser = new Parser(Constants.SampleHtmlWithImages, settings))
{
// Extract images from HTML document
IEnumerable<PageImageArea> images = parser.GetImages();
// Iterate over extracted images
foreach (PageImageArea i in images)
{
// Print the type of image
Console.WriteLine(i.FileType);
}
}
/// <summary>
/// This class provides the ability to filter extracted images.
/// </summary>
private class Handler : ExternalResourceHandler
{
/// <summary>
/// Called before any external resource loads. It allows to skip unnesesary file loading.
/// </summary>
public override void OnLoading(ExternalResourceLoadingArgs args)
{
// Check if the file name ends with installation.png
if (!args.Uri.EndsWith("installation.png"))
{
// Otherwise skip this file
args.Skipped = true;
}
base.OnLoading(args);
}
}
You may easily run the code above and see the feature in action in our GitHub examples:
Along with full featured .NET library we provide simple, but powerful free Apps.
You are welcome to parse documents and extract data from PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, Emails and more with our free online Free Online Document Parser App.
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