Hello.

You probably can delete files with are not registered in Media section.

I've made a check script in a Visual Studio project for Umbraco 4.5. First I listed all files within media folder. After, I checked all registered media and marked the files as "used" or "not used" (it means "registered"). Here goes the code. It only lists unregistered files and empty directories, no removal is made. You must log as admin in the backend, and access your page. I hope it helps. Feel free to change.

References:

• umbraco.dll
• businesslogic.dll
• cms.dll

ASPX page (section):

        <asp:Panel ID="panCheck" runat="server" Visible="false">
            <p>
                <asp:Button ID="btnDoCheck" runat="server" Text="Do check" 
                    onclick="btnDoCheck_Click" />
            </p>
            <div>
                <p>Files not in media (unregistered files):</p>
                <asp:GridView ID="gvFiles" runat="server"></asp:GridView>
            </div>
            <div>
                <p>Empty directories:</p>
                <asp:GridView ID="gvDirectories" runat="server"></asp:GridView>
            </div>
        </asp:Panel>
        <asp:Panel ID="panDenied" runat="server" Visible="false">
            <p>You must be logged as admin to use this function.</p>
        </asp:Panel>

Code behind:

/* Page to check for unused files (unregistered) in Media section of Umbraco 4.5
 * Developed by Fernando Camillo ([email protected]) (I'm not a C# master... sorry!)
 * Please test it before use! And feel free to change it. */

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

using umbraco.BusinessLogic;
using umbraco.cms.businesslogic.media;
using System.IO;

namespace CheckForUnusedMedia
{
    public partial class CheckForUnusedMedia : System.Web.UI.Page
    {
        //Deny use of this tool if not admin
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!(Page.IsPostBack))
            {
                if (isUserLoggedAndAdmin())
                {
                    panCheck.Visible = true;
                    panDenied.Visible = false;
                }
                else
                {
                    panCheck.Visible = false;
                    panDenied.Visible = true;
                }
            }
        }

        
        //Do check button
        protected void btnDoCheck_Click(object sender, EventArgs e)
        {
            // Part 1 - Unused files in media
            DataTable dtFiles = new DataTable("files");
            dtFiles.Columns.Add(new DataColumn("file", typeof(System.String)));
            dtFiles.Columns.Add(new DataColumn("exists_in_media", typeof(System.String)));
            dtFiles.Columns.Add(new DataColumn("media_id", typeof(System.Int32)));
            dtFiles.Columns.Add(new DataColumn("file_size", typeof(System.Int64)));

            loadFilesFromADirectory(dtFiles, Server.MapPath(@"/media/"));
            loadFilesFromUmbracoMedia(dtFiles, null);

            //filter, order and show
            DataView dvUnusedFiles = new DataView(dtFiles, 
                                                  @"exists_in_media = 'NO'", 
                                                  "file ASC", 
                                                  DataViewRowState.CurrentRows);
            gvFiles.DataSource = dvUnusedFiles;
            gvFiles.DataBind();

            // ===================

            // Part 2 - Empty directories
            DataTable dtEmptyDirectories = new DataTable("directories");
            dtEmptyDirectories.Columns.Add(new DataColumn("directory", typeof(System.String)));

            loadEmptyDirectories(dtEmptyDirectories, Server.MapPath(@"/media/"));

            //filter, order and show
            DataView dvEmptyDir = new DataView(dtEmptyDirectories, 
                                               string.Empty, 
                                               "directory ASC", 
                                               DataViewRowState.CurrentRows);
            gvDirectories.DataSource = dvEmptyDir;
            gvDirectories.DataBind();
        }


        //Fills the datatable with files in the directory and its subdirectories
        private void loadFilesFromADirectory(DataTable dt, string path)
        {
            DirectoryInfo myDir = new DirectoryInfo(path);
            FileInfo[] fileInfos = myDir.GetFiles();
            DataRow dr;

            foreach (FileInfo fi in fileInfos)
            {
                dr = dt.NewRow();
                dr["file"] = fi.FullName.ToLower().Trim(); // uses lowercase for easy compare
                dr["exists_in_media"] = "NO";
                dr["media_id"] = -1;
                dr["file_size"] = fi.Length;
                dt.Rows.Add(dr);
            }

            DirectoryInfo[] dirInfos = myDir.GetDirectories();
            foreach (DirectoryInfo di in dirInfos)
            {
                loadFilesFromADirectory(dt, di.FullName);
            }
        }


        //Fills the datatable with files in Umbraco Media
        private void loadFilesFromUmbracoMedia(DataTable dt, umbraco.cms.businesslogic.media.Media mediaNode)
        {
            string fileName;

            if (mediaNode == null)
            {
                foreach (umbraco.cms.businesslogic.media.Media m in umbraco.cms.businesslogic.media.Media.GetRootMedias())
                {
                    try
                    {
                        fileName = m.getProperty("umbracoFile").Value.ToString().Trim();
                        if (fileName != string.Empty)
                        {
                            fileName = Server.MapPath(fileName).ToLower().Trim(); // uses lowercase for easy compare
                            markThatFileExistsInUmbracoMedia(dt, fileName, m.Id);
                        }
                    }
                    catch (Exception)
                    {
                        //do nothing
                    }
                    loadFilesFromUmbracoMedia(dt, m);
                }
            }
            else
            {
                foreach (umbraco.cms.businesslogic.media.Media m in mediaNode.Children)
                {
                    try
                    {
                        fileName = m.getProperty("umbracoFile").Value.ToString().Trim();
                        if (fileName != string.Empty)
                        {
                            fileName = Server.MapPath(fileName).ToLower().Trim(); // uses lowercase for easy compare
                            markThatFileExistsInUmbracoMedia(dt, fileName, m.Id);
                        }
                    }
                    catch (Exception)
                    {
                        //do nothing
                    }
                    loadFilesFromUmbracoMedia(dt, m);
                }
            }
        }


        //Mark that a file exists in Media section of Umbraco
        private void markThatFileExistsInUmbracoMedia(DataTable dt, string fileName, int mediaId)
        {
            foreach (DataRow dr in dt.Rows)
            {
                if (Convert.ToString(dr["file"]) == fileName)
                {
                    dr["exists_in_media"] = "YES";
                    dr["media_id"] = mediaId;
                }
            }

            //check also for the thumbnail version
            foreach (DataRow dr in dt.Rows)
            {
                if (Convert.ToString(dr["file"]) == fileName.Replace(".", "_thumb."))
                {
                    dr["exists_in_media"] = "YES";
                    dr["media_id"] = mediaId;
                    return;
                }
            }
        }


        //Fills the datatable with empty directories
        private void loadEmptyDirectories(DataTable dt, string path)
        {
            DirectoryInfo myDir = new DirectoryInfo(path);
            DataRow dr;

            FileInfo[] fileInfos = myDir.GetFiles();
            DirectoryInfo[] dirInfos = myDir.GetDirectories();

            if ((fileInfos.Count() == 0) && (dirInfos.Count() == 0))
            {
                dr = dt.NewRow();
                dr["directory"] = myDir.FullName.ToLower().Trim();
                dt.Rows.Add(dr);
            }
            else
            {
                if (dirInfos.Count() > 0)
                {
                    foreach (DirectoryInfo di in dirInfos)
                    {
                        loadEmptyDirectories(dt, di.FullName);
                    }
                }
            }
        }


        //Check if a user is logged in Umbraco backend, and if its an administrator
        private bool isUserLoggedAndAdmin()
        {
            umbraco.BusinessLogic.User user;
            try
            {
                user = umbraco.helper.GetCurrentUmbracoUser();
                if (user == null)
                {
                    return false;
                }
                else
                {
                    if (user.UserType.Alias.ToLower() == "admin")
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
            }
            catch (Exception)
            {
                return false;
            }
        }

    }
}

can you give some help to put this in my umbraco, I'm new to umbraco.

is working on a reply...