UploadStreamAsync Method

Uploads the data in a stream to a SharePoint server folder asynchronously.

Syntax

Visual Basic
C#
Objective-C
Java
C++

public void UploadStreamAsync( 
   Stream sourceStream,
   Uri siteUri,
   string destinationPath,
   object userState
)

'Declaration
 
Public Sub UploadStreamAsync( _
   ByVal sourceStream As Stream, _
   ByVal siteUri As Uri, _
   ByVal destinationPath As String, _
   ByVal userState As Object _
)

'Usage
 
Dim instance As SharePointClient
Dim sourceStream As Stream
Dim siteUri As Uri
Dim destinationPath As String
Dim userState As Object
 
instance.UploadStreamAsync(sourceStream, siteUri, destinationPath, userState)

public:
void UploadStreamAsync( 
   Stream^ sourceStream,
   Uri^ siteUri,
   String^ destinationPath,
   Object^ userState
)

Parameters

sourceStream: The stream containing the item data to upload. This value cannot be null (Nothing in Visual Basic).
siteUri: Full URL to the destination SharePoint site. This could be http://MySite or http://MySiteCollection/MySite. This value cannot be null (Nothing in Visual Basic).
destinationPath: Destination path (folder and file name) of the item to be created in the SharePoint server. See the remarks section for more information. This value cannot be null (Nothing in Visual Basic).
userState: The optional user-supplied state object that is used to identify the task that raised the UploadCompleted event.

Remarks

This method will return control immediately to your program and the UploadCompleted will occur when the upload operation is completed (successfully or if an error occurred).

This method will upload the content of sourceStream to SharePoint server. Note that the stream must stay alive will UploadCompleted occur. The location and name of the destination item in the server is determined as follows:


            DestinationFileFullUrl = siteUri + destinationPath

For example, assume the SharePoint server contains a folder with the following name:


            http://site/Shared Documents/

And you want the uploaded item with the name File.ext into this folder. You can perform this using this code:


            Uri siteUri = new Uri(@"http://site");
            string destinationPath = @"Shared Documents/File.ext";
            sharePointClientObject.UploadFile(sourceFileName, siteUri, destinationPath);

You can use the .NET System.IO.Path and System.UriBuilder classes to build the path and URI of the items. No that destinationPath is allowed to contain slashes (/) as in HTTP URI's or forward slashes (\) as in Windows paths or a mix of both.

To upload a stream synchronously, use UploadStream.

To upload a disk file to the server, use UploadFile or UploadFileAsync.

To down an item from SharePoint, use DownloadFile, DownloadFileAsync, GetDownloadStream or GetDownloadStreamAsync.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.SharePoint.Client

Private Shared Sub SharePointClientUploadStreamAsyncExample()
   Dim sourceFileName As String = "C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif"
   ' Replace SHAREPOINT_SITE_URI with a valid URL to a SharePoint site, for example
   ' http://SiteCollection/MySite
   Dim siteUri As New Uri(SHAREPOINT_SITE_URI)

   ' Replace SHAREPOINT_FOLDER_NAME with a valid folder on the site above, for example
   ' "Documents" or "Documents\Sub Documents"
   Dim folderName As String = SHAREPOINT_FOLDER_NAME

   ' Get a stream to the file
   Using stream As FileStream = File.OpenRead(sourceFileName)
      Dim spClient As New SharePointClient()
      spClient.OverwriteExistingFiles = True

      ' 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
      Dim wait As New AutoResetEvent(False)

      ' Build the upload document full path (folder + file name)
      Dim destinationPath As String = Path.Combine(folderName, Path.GetFileName(sourceFileName))

      ' Upload the document
      AddHandler spClient.UploadCompleted, AddressOf UploadStreamAsyncCompleted
      spClient.UploadStreamAsync(stream, siteUri, destinationPath, wait)

      ' Wait till the operation completes
      Console.WriteLine("Waiting to upload to finish")
      wait.WaitOne()
      wait.Close()

      Console.WriteLine("Upload completed")
   End Using
End Sub

Private Shared Sub UploadStreamAsyncCompleted(ByVal sender As Object, ByVal e As SharePointClientUploadCompletedEventArgs)
   ' Remove our handler
   Dim spClient As SharePointClient = CType(sender, SharePointClient)
   RemoveHandler spClient.UploadCompleted, AddressOf UploadStreamAsyncCompleted

   If IsNothing(e.Error) AndAlso Not e.Cancelled Then
      ' All OK, the file is in SharePoint
   Else
      ' Some error occured
      If Not IsNothing(e.Error) Then
         Console.WriteLine(e.Error.Message)
      Else
         Console.WriteLine("User cancelled")
      End If
   End If

   ' Tell whoever is listening that we are done
   Dim wait As EventWaitHandle = CType(e.UserState, EventWaitHandle)
   wait.Set()
End Sub

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.SharePoint.Client;

private static void SharePointClientUploadStreamAsyncExample()
{
   string sourceFileName = @"C:\Users\Public\Documents\LEADTOOLS Images\Ocr1.tif";
   // 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;

   // Get a stream to the file
   using (FileStream stream = File.OpenRead(sourceFileName))
   {
      SharePointClient spClient = new SharePointClient();
      spClient.OverwriteExistingFiles = true;

      // 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);

      // Build the upload document full path (folder + file name)
      string destinationPath = Path.Combine(folderName, Path.GetFileName(sourceFileName));

      // Upload the document
      spClient.UploadCompleted += new EventHandler<SharePointClientUploadCompletedEventArgs>(UploadStreamAsyncCompleted);
      spClient.UploadStreamAsync(stream, siteUri, destinationPath, wait);

      // Wait till the operation completes
      Console.WriteLine("Waiting to upload to finish");
      wait.WaitOne();
      wait.Close();

      Console.WriteLine("Upload completed");
   }
}

private static void UploadStreamAsyncCompleted(object sender, SharePointClientUploadCompletedEventArgs e)
{
   // Remove our handler
   SharePointClient spClient = sender as SharePointClient;
   spClient.UploadCompleted -= new EventHandler<SharePointClientUploadCompletedEventArgs>(UploadStreamAsyncCompleted);

   if (e.Error == null && !e.Cancelled)
   {
      // All OK, the file is in SharePoint
   }
   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();
}

Requirements

Target Platforms

Reference

SharePointClient Class
SharePointClient Members