Download SharePoint List Attachments – Code Sample

Here is a simple code sample for downloading SharePoint List Item attachments. When the code is run all attachments are downloaded. Subfolders are created based on the List Item ID.

Code Sample

using System.IO;
using Microsoft.SharePoint; //Located: C:\Program Files\Common Files\microsoft shared\web server extensions\12\ISAPI 
...
static void Main(string[] args)
{
    try
    {
        DownloadListAttachments(@"http://portalname/webname/", "listname", @"c:\Temp\Attachments\");
    }
    catch (Exception ex)
    {
        //TODO: Handle exception
    }
}

public void DownloadListAttachments(string siteUrl, string listName, 
    string downloadLocation)
{
    string downloadItemLocation = string.Empty;
    using (SPSite site = new SPSite(siteUrl))
    {
        using (SPWeb web = site.OpenWeb())
        {
            foreach (SPFolder folder in 
                web.Folders["Lists"].SubFolders[listName].SubFolders["Attachments"].SubFolders)
            {
                foreach (SPFile file in folder.Files)
                {
                    byte[] binFile = file.OpenBinary();
                    downloadItemLocation = downloadLocation + "\\" + folder.Name + "\\";
                    if (!Directory.Exists(downloadItemLocation))
                    {
                        Directory.CreateDirectory(downloadItemLocation);
                    }
                    System.IO.FileStream fstream = 
                        System.IO.File.Create(downloadItemLocation + file.Name);
                    fstream.Write(binFile, 0, binFile.Length);
                }
            }
        }
    }
}

Screenshots
 

References 
How to programmatically download attachments from list items in Windows SharePoint Services