You have multiple ways of uploading a document, depending on where you code is running.
Server object model:
var context = SPContext.Current;
// Get the web reference
var web = context.Web;
// Get the library reference
var docLib = web.Lists.TryGetList("NAME OF THE LIBRARY HERE");
if (docLib == null)
{
return;
}
// Add the document. Y asume you have the FileStream somewhere
docLib.RootFolder.Files.Add(docLib.RootFolder.Url + "FILE NAME HERE", someFileStream);
With client object object model:
// Get the SharePoint context
ClientContext context = new ClientContext("URL OF THE SHAREPOINT SITE");
// Open the web
var web = context.Web;
// Create the new file
var newFile = new FileCreationInformation();
newFile.Content = System.IO.File.ReadAllBytes("PATH TO YOUR FILE");
newFile.Url = "NAME OF THE NEW FILE";
// Get a reference to the document library
var docs = web.Lists.GetByTitle("NAME OF THE LIBRARY");
var uploadFile = docs.RootFolder.Files.Add(newFile);
// Upload the document
context.Load(uploadFile);
context.ExecuteQuery();
So you can first iterate the folder using following code:
string[] filePaths = Directory.GetFiles(@"c:\MyDir\");
From this you can iterate the files and upload to the document Library.