public DocumentPreviewDto LoadDocument(PostedDataDto postedData)
{
string password = string.IsNullOrEmpty(postedData.password) ? null : postedData.password;
var documentPreview = new DocumentPreviewDto();
// set password for protected document
var loadOptions = new LoadOptions
{
Password = password
};
bool completed = ExecuteWithTimeLimit(TimeSpan.FromMilliseconds(metadataConfiguration.GetPreviewTimeLimit()), cancelationToken =>
{
using (Stream fileStream = fileService.GetSourceFileStream(postedData.guid))
using (GroupDocs.Metadata.Metadata metadata = new GroupDocs.Metadata.Metadata(fileStream, loadOptions))
{
cancelationToken.ThrowIfCancellationRequested();
IReadOnlyList <PageInfo> pages = metadata.GetDocumentInfo().Pages;
using (MemoryStream stream = new MemoryStream())
{
PreviewOptions previewOptions = new PreviewOptions(pageNumber => stream, (pageNumber, pageStream) => { });
previewOptions.PreviewFormat = PreviewOptions.PreviewFormats.PNG;
int pageCount = pages.Count;
if (metadataConfiguration.GetPreloadPageCount() > 0)
{
pageCount = metadataConfiguration.GetPreloadPageCount();
}
for (int i = 0; i < pageCount; i++)
{
cancelationToken.ThrowIfCancellationRequested();
previewOptions.PageNumbers = new[] { i + 1 };
try
{
metadata.GeneratePreview(previewOptions);
}
catch (NotSupportedException)
{
break;
}
PageDescriptionEntity pageData = GetPageDescriptionEntities(pages[i]);
string encodedImage = Convert.ToBase64String(stream.ToArray());
pageData.SetData(encodedImage);
documentPreview.SetPages(pageData);
stream.SetLength(0);
}
}
}
});
documentPreview.SetTimeLimitExceeded(!completed);
documentPreview.SetGuid(postedData.guid);
// return document description
return(documentPreview);
}
public LoadDocumentEntity LoadDocument(PostedDataDto postedData)
{
// get/set parameters
string filePath = metadataConfiguration.GetAbsolutePath(postedData.guid);
string password = string.IsNullOrEmpty(postedData.password) ? null : postedData.password;
LoadDocumentEntity loadDocumentEntity = new LoadDocumentEntity();
// set password for protected document
var loadOptions = new LoadOptions
{
Password = password
};
using (GroupDocs.Metadata.Metadata metadata = new GroupDocs.Metadata.Metadata(filePath, loadOptions))
{
GroupDocs.Metadata.Common.IReadOnlyList <PageInfo> pages = metadata.GetDocumentInfo().Pages;
using (MemoryStream stream = new MemoryStream())
{
PreviewOptions previewOptions = new PreviewOptions(pageNumber => stream, (pageNumber, pageStream) => { });
previewOptions.PreviewFormat = PreviewOptions.PreviewFormats.PNG;
int pageCount = pages.Count;
if (metadataConfiguration.GetPreloadPageCount() > 0)
{
pageCount = metadataConfiguration.GetPreloadPageCount();
}
for (int i = 0; i < pageCount; i++)
{
previewOptions.PageNumbers = new[] { i + 1 };
try
{
metadata.GeneratePreview(previewOptions);
}
catch (NotSupportedException)
{
continue;
}
PageDescriptionEntity pageData = GetPageDescriptionEntities(pages[i]);
string encodedImage = Convert.ToBase64String(stream.ToArray());
pageData.SetData(encodedImage);
loadDocumentEntity.SetPages(pageData);
stream.SetLength(0);
}
}
}
loadDocumentEntity.SetGuid(postedData.guid);
// return document description
return(loadDocumentEntity);
}
