How do you upload a file to a document library in sharepoint?

Question

How do you programmatically upload a file to a document library in sharepoint?

I am currently making a Windows application using C# that will add documents to a document library list.

Answer 1

You can upload documents to SharePoint libraries using the Object Model or SharePoint Webservices.

Upload using Object Model:

String fileToUpload = @"C:\YourFile.txt"; String sharePointSite = "http://yoursite.com/sites/Research/"; String documentLibraryName = "Shared Documents";  using (SPSite oSite = new SPSite(sharePointSite)) {     using (SPWeb oWeb = oSite.OpenWeb())     {         if (!System.IO.File.Exists(fileToUpload))             throw new FileNotFoundException("File not found.", fileToUpload);                              SPFolder myLibrary = oWeb.Folders[documentLibraryName];          // Prepare to upload         Boolean replaceExistingFiles = true;         String fileName = System.IO.Path.GetFileName(fileToUpload);         FileStream fileStream = File.OpenRead(fileToUpload);          // Upload document         SPFile spfile = myLibrary.Files.Add(fileName, fileStream, replaceExistingFiles);          // Commit          myLibrary.Update();     } } 

Answer 2

if you get this error "Value does not fall within the expected range" in this line:

SPFolder myLibrary = oWeb.Folders[documentLibraryName]; 

use instead this to fix the error:

SPFolder myLibrary = oWeb.GetList(URL OR NAME).RootFolder; 

Use always URl to get Lists or others because they are unique, names are not the best way ;)