update the attachment in the document library programatically

Question

i have A list and B document library . in the A list i have attachment field and once user adds an attachment it should go to the B document library . how can i do that . and i want to do it in my event receiver .

using (SPSite SPSite = new SPSite(Convert.ToString(ConfigurationManager.AppSettings["siteURL"])))
                  {
                      using (SPWeb SPWeb= SPSite.OpenWeb())
                      {

                          SPListItem ITPCItem = ITPCWeb.Lists[properties.ListId].GetItemById(properties.ListItem.ID);}}}

this way i am getting the SPList Item.

enter code here

Answer 1

Get File from Library A

var aLibrary = (SPDocumentLibrary)spWeb.Lists.TryGetList("A");
var aLibraryItem = aLibrary.GetItemById(ItemId);
var fileContentAsBytes = aLibraryItem.File.OpenBinary();

Now move the file in Library B

var bLibrary = (SPDocumentLibrary)spWeb.Lists.TryGetList("B");
var destUrl = bLibrary.RootFolder.Url + "/" + aLibraryItem.File.Name;
SPFile destFile = bLibrary.RootFolder.Files.Add(destUrl, fileContentAsBytes, true);