How to move an item from custom list root location to sub folder programmatically?

Question

How to move an item from custom list root location to sub folder programmatically (in Event Receiver (ItemAdded))?

Answer 1

You can identify a custom list's root folder using SPList.Rootfolder property and corresponding subfolders could be accessed using SPList.Rootfolder.SubFolders[index].

While adding the list item, make sure that it is added to the correct folder path.

SPListItem listitem = list.Items.Add(folder.ServerRelativeURL,SpFileSystemObjectType.File)

Sample code might look like this.

     using (SPWeb web = properties.OpenWeb())
       {
           SPList list = web.Lists["Test"];

           if (properties.List.Title == list.Title)
           {
               foreach (SPFolder folder in properties.List.RootFolder.SubFolders)
               {
                   if (folder.Name == "Specific Folder Name")
                   {
                       SPListItem listItem = list.Items.Add(folder.ServerRelativeUrl, SPFileSystemObjectType.File);
                       listItem["FieldName"] = properties.ListItem["FieldName"];
                       listItem.Update();
                   }
               }
           }

       }

Answer 2

This solution allow you to move to any folder in same or different list http://think4code.blogspot.com/2012/03/move-list-item-splistitem-to-sub-folder.html