GetDownloadStreamAsync Method

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.SharePoint.Client; 
 
 
public void SharePointClientDownloadStreamAsyncExample() 
{ 
   // 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); 
 
   // 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>(MyDownloadStreamAsyncCompleted); 
   spClient.GetDownloadStreamAsync(sourceDocumentUri, wait); 
 
   // Wait till the operation completes 
   wait.WaitOne(); 
   wait.Close(); 
} 
 
private static void MyDownloadStreamAsyncCompleted(object sender, SharePointClientDownloadCompletedEventArgs e) 
{ 
   // Remove our handler 
   SharePointClient spClient = sender as SharePointClient; 
   spClient.DownloadCompleted -= new EventHandler<SharePointClientDownloadCompletedEventArgs>(MyDownloadStreamAsyncCompleted); 
 
   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.DestinationData.Stream, 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"); 
   } 
 
   // Dispose the SharePoint stream 
   if (e.DestinationData != null) 
   { 
      e.DestinationData.Dispose(); 
   } 
 
   // Tell whoever is listening that we are done 
   EventWaitHandle wait = e.UserState as EventWaitHandle; 
   wait.Set(); 
}