Upload large file to Sharepoint with Silverlight - silverlight-4.0

Question

I am trying to upload a photo to a sharepoint library. If I use a relatively small file (370KB) then it works without any problems.
But if I try to upload a file that is about 3MB large then I get the error:
"Der Remoteserver hat einen Fehler zurückgegeben: NotFound."
translated:
"The remote server returned an error: NotFound."
I read that it should be possible to set the max message size, but I found no way to set such a thing in the ClientContext object.
This is the code I use:
private void UploadFileCallback(object state)
{
var args = (List<object>)state;
var itemContainer = (ISharepointItemContainer)args.ElementAt(0);
var fileInfo = (FileInfo)args.ElementAt(1);
var sharepointList = _context.Web.Lists.GetByTitle(itemContainer.ListName);
Microsoft.SharePoint.Client.File uploadFile;
FileCreationInformation newFile;
using (FileStream fs = fileInfo.OpenRead())
{
byte[] content = new byte[fs.Length];
newFile = new FileCreationInformation();
int dummy = fs.Read(content, 0, (int)fs.Length);
newFile.Content = content;
newFile.Url = itemContainer.AbsoluteUrl + "/" + fileInfo.Name;
uploadFile = sharepointList.RootFolder.Files.Add(newFile);
_context.Load(uploadFile);
}
_context.ExecuteQuery();
if (FileUploadCompleted != null)
{
FileUploadCompleted(this, EventArgs.Empty);
}
}
Does anyone have an idea on how to resolve this issue?

Answer 1

The first thing to try is to go to the Web Applications Management section in the Central Administration site for SharePoint. Select the General Settings for the web app that you are deploying to and increase the maximum upload size.
The second thing to try is to add this to your web.config:
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="52428800"/>
</requestFiltering>
</security>
</system.webServer>
This will let you set the size to something larger.

Answer 2

By default, SharePoint has a 50MB max limit per upload. IIS 7 (not sure about other versions) has a 30 MB max limit per upload. You will need to add the XML configuration that Ryan provided to your SharePoint website's web.config, in IIS. This is your front-end web server.

Answer 3

The limit you're reaching is because the webservice that handles Client Object Model requests has a maximum message size. You can either increase that size, but another solution is to use WebDAV to upload the document, this will help if you don't have access to the server.
The .NET Client Object Model has a method File.SaveBinraryDirect() for that, and that's probably your best bet.
If you were using the Silverlight Client Object Model that method is not available and you'll have write some additional code: see this article, second part. The first part descibes how to increase the maximum message size.
This should increase your maximum upload size to the one set in Central Admin (typically 50MB), pointed out in other posts.

Answer 4

The default upload size limit for the SharePoint client object model is 2 MB. You can change that limit by modifying the MaxReceivedMessageSize property of the service.
This can be done in two ways:
programatically - as described in this link - tho this won't work in Silverlight for example
trough the powershell. On the server where you have SharePoint installed, fire up the SharePoint Management Shell (make sure you run it under the farm administrator account) and run the following commands.
$ws = [Microsoft.SharePoint.Administration.SPWebService]::ContentService
$ws.ClientRequestServiceSettings.MaxReceivedMessageSize = 52428800
$ws.Update()
This will change the upload limit to 52428800 bytes - or 50 MB. Now, restart the website hosting your SharePoint site (or the entire IIS) for the changes to take effect.