One of the best way to programmatically upload large documents to SharePoint site is by leveraging the UploadAsync method of WebClient class. The WebClient class internally uses the WebDav protocol. This approach can be used for uploading documents to SharePoint Online (Office 365) as well. The only limitation with this approach is that we’ll not able to set the meta-data of the documents using WebClient class. Here is the code-snippet for the same:-

 WebClient oWebClient = new WebClient();

oWebClient.UseDefaultCredentials = true;
byte[] bFile = System.IO.File.ReadAllBytes(@"C:SundarWEB315.wmv");

string ulr = @"http://lt010593/Shared Documents/WEB315.wmv";
System.Uri oUri = new System.Uri(ulr);

oWebClient.UploadDataAsync(oUri, "PUT", bFile);
oWebClient.UploadDataCompleted += new UploadDataCompletedEventHandler(oWebClient_UploadDataCompleted);

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, “Courier New”, courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

 Subscribe to my blog