public string DestinationFileName { get; }
The download operation destination file name.
This is the same value as the destinationFileName parameter passed to DownloadFileAsync if this method was called to initiate the download. If GetDownloadStreamAsync was called to initiate the download, then the value of this property is null (Nothing in VB).
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.SharePoint.Client;
public void SharePointClientDownloadFileAsyncExample()
{
// Replace SHAREPOINT_SITE_URI with a valid URL to a SharePoint site, for example
// http://SiteCollection/MySite
Uri siteUri = new Uri(SHAREPOINT_SITE_URI);
// Replace SHAREPOINT_FOLDER_NAME with a valid folder on the site above, for example
// "Documents" or "Documents\Sub Documents"
string folderName = SHAREPOINT_FOLDER_NAME;
// Replace SHAREPOINT_DOCUMENT_NAME with a valid document on the folder above, for example
// MyDocument.tif
string documentName = SHAREPOINT_DOCUMENT_NAME;
// Build the full URL to the document are we going to download
UriBuilder builder = new UriBuilder(siteUri);
builder.Path = Path.Combine(builder.Path, folderName);
builder.Path = Path.Combine(builder.Path, documentName);
Uri sourceDocumentUri = builder.Uri;
SharePointClient spClient = new SharePointClient();
// Optional: Set the credentials:
spClient.Credentials = new NetworkCredential(USER_NAME, PASSWORD, DOMAIN);
string tempFileName = Path.GetTempFileName();
// If this is a console application demo, we might exit the program before the operation completes,
// so use a wait handle to not exit this method till the opreation completes
AutoResetEvent wait = new AutoResetEvent(false);
// Download the SharePoint item to the temporary file asynchronously
spClient.DownloadCompleted += new EventHandler<SharePointClientDownloadCompletedEventArgs>(MyDownloadFileAsyncCompleted);
spClient.DownloadFileAsync(sourceDocumentUri, tempFileName, wait);
// Wait till the operation completes
wait.WaitOne();
wait.Close();
// Delete the temporary file we created
File.Delete(tempFileName);
}
private static void MyDownloadFileAsyncCompleted(object sender, SharePointClientDownloadCompletedEventArgs e)
{
// Remove our handler
SharePointClient spClient = sender as SharePointClient;
spClient.DownloadCompleted -= new EventHandler<SharePointClientDownloadCompletedEventArgs>(MyDownloadFileAsyncCompleted);
if (e.Error == null && !e.Cancelled)
{
// All is OK, use RasterCodecs to get its info
using (RasterCodecs codecs = new RasterCodecs())
{
using (CodecsImageInfo imageInfo = codecs.GetInformation(e.DestinationFileName, true))
{
// Show the image info
Console.WriteLine("URL: {0}", e.SourceUri);
Console.WriteLine("Pages: {0}", imageInfo.TotalPages);
Console.WriteLine("Size: {0} by {1} pixels", imageInfo.Width, imageInfo.Height);
Console.WriteLine("Resolution: {0} by {1} dpi", imageInfo.XResolution, imageInfo.YResolution);
Console.WriteLine("Bits/Pixel: {0}", imageInfo.BitsPerPixel);
}
}
}
else
{
// Some error occured
if (e.Error != null)
Console.WriteLine(e.Error.Message);
else
Console.WriteLine("User cancelled");
}
// Tell whoever is listening that we are done
EventWaitHandle wait = e.UserState as EventWaitHandle;
wait.Set();
}