Simple Code Programatically Uploading a Document to a Document Library Via Object Model.

  

try

            {

                SPSecurity.RunWithElevatedPrivileges(delegate()

                 {

                    if (fuBrowse.PostedFile != null && fuBrowse.PostedFile.ContentLength > 0)

                    {

                        SPWeb web = SPContext.Current.Web;

                        HttpPostedFile myFile = fuBrowse.PostedFile;

                        int filelen = myFile.ContentLength;

                        byte[] contents = new byte[filelen];

                        myFile.InputStream.Read(contents, 0, filelen);

                        String fileName = System.IO.Path.GetFileName(fuBrowse.PostedFile.FileName);

                        string strFilenName = fileName;

                        Boolean replaceExistingFiles = true;

                        SPFile fileDetails = null;

                        SPFolder myLibrary = web.GetFolder("Shared Documents");

                        fileDetails = myLibrary.Files.Add(strFilenName, contents, replaceExistingFiles);

                        fileDetails.Update();

                        lblErrorMessage.Text = "Document Uploaded Successfully...!";

                    }

                });

            }

            catch (Exception ex)

            {

                lblErrorMessage.Text = ex.ToString();

            }