Creating media items is as simple as creating new documents.

Using umbraco.cms.businesslogic.media; do something like this:

var imageType = MediaType.GetByAlias("Image");
Media.MakeNew("myTitle", imageType, new User(0), 1234);

The "1234" is the parent id under which the media item should be created.

Ok Sebastiaan got that working, but how do i get the file i uploaded in my temp dir to that media item?

Do i have to manually create the upload folder, and resize it, or are there methods in the api to do that?

Ok its working now, found a sample on the old board:

[code]

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using umbraco;
using umbraco.cms;
using umbraco.cms.businesslogic.member;
using umbraco.cms.businesslogic.web;
using umbraco.BusinessLogic;
using umbraco.cms.businesslogic.media;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Xml;


namespace umbraco.presentation.usercontrols
{
    public partial class MediaUpload : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            string mediaPath = "";
            if (FileUpload1.HasFile)
            {

                    FileUpload1.SaveAs(@"C:\\temp\" + FileUpload1.FileName);
                   
                    string _text = FileUpload1.PostedFile.FileName;
                    string filename;
                    string _fullFilePath;
                    filename = _text.Substring(_text.LastIndexOf("\\") + 1, _text.Length - _text.LastIndexOf("\\") - 1).ToLower();
                
                    var imageType = MediaType.GetByAlias("Image");
                    //Hardcoded Node 1045
                    Media m = Media.MakeNew(filename, imageType, new User(0), 1045);

                    // Create a new folder in the /media folder with the name /media/propertyid
                    System.IO.Directory.CreateDirectory(System.Web.HttpContext.Current.Server.MapPath(GlobalSettings.Path + "/../media/" + m.Id.ToString()));
                    _fullFilePath = System.Web.HttpContext.Current.Server.MapPath(GlobalSettings.Path + "/../media/" + m.Id.ToString() + "/" + filename);
                    FileUpload1.PostedFile.SaveAs(_fullFilePath);


                    // Save extension
                    string orgExt = ((string)_text.Substring(_text.LastIndexOf(".") + 1, _text.Length - _text.LastIndexOf(".") - 1));
                    orgExt = orgExt.ToLower();
                    string ext = orgExt.ToLower();
                    try
                    {
                        m.getProperty("umbracoExtension").Value = ext;
                    }
                    catch { }

                    // Save file size
                    try
                    {
                        System.IO.FileInfo fi = new FileInfo(_fullFilePath);
                        m.getProperty("umbracoBytes").Value = fi.Length.ToString();
                    }
                    catch { }

                    // Check if image and then get sizes, make thumb and update database
                    if (",jpeg,jpg,gif,bmp,png,tiff,tif,".IndexOf("," + ext + ",") > 0)
                    {
                        int fileWidth;
                        int fileHeight;

                        FileStream fs = new FileStream(_fullFilePath,
                            FileMode.Open, FileAccess.Read, FileShare.Read);

                        System.Drawing.Image image = System.Drawing.Image.FromStream(fs);
                        fileWidth = image.Width;
                        fileHeight = image.Height;
                        fs.Close();
                        try
                        {
                            m.getProperty("umbracoWidth").Value = fileWidth.ToString();
                            m.getProperty("umbracoHeight").Value = fileHeight.ToString();
                        }
                        catch { }

                        // Generate thumbnails
                        string fileNameThumb = _fullFilePath.Replace("." + orgExt, "_thumb");
                        generateThumbnail(image, 100, fileWidth, fileHeight, _fullFilePath, ext, fileNameThumb + ".jpg");

                        image.Dispose();
                    }
                    mediaPath = "/media/" + m.Id.ToString() + "/" + filename;

                    m.getProperty("umbracoFile").Value = mediaPath;
                    m.XmlGenerate(new XmlDocument());

                  
            }
        }
        protected void generateThumbnail(System.Drawing.Image image, int maxWidthHeight, int fileWidth, int fileHeight, string fullFilePath, string ext, string thumbnailFileName)
        {
            // Generate thumbnail
            float fx = (float)fileWidth / (float)maxWidthHeight;
            float fy = (float)fileHeight / (float)maxWidthHeight;
            // must fit in thumbnail size
            float f = Math.Max(fx, fy); //if (f < 1) f = 1;
            int widthTh = (int)Math.Round((float)fileWidth / f); int heightTh = (int)Math.Round((float)fileHeight / f);

            // fixes for empty width or height
            if (widthTh == 0)
                widthTh = 1;
            if (heightTh == 0)
                heightTh = 1;

            // Create new image with best quality settings
            Bitmap bp = new Bitmap(widthTh, heightTh);
            Graphics g = Graphics.FromImage(bp);
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;

            // Copy the old image to the new and resized
            Rectangle rect = new Rectangle(0, 0, widthTh, heightTh);
            g.DrawImage(image, rect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);

            // Copy metadata
            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo codec = null;
            for (int i = 0; i < codecs.Length; i++)
            {
                if (codecs[i].MimeType.Equals("image/jpeg"))
                    codec = codecs[i];
            }

            // Set compresion ratio to 90%
            EncoderParameters ep = new EncoderParameters();
            ep.Param[0] = new EncoderParameter(Encoder.Quality, 90L);

            // Save the new image
            bp.Save(thumbnailFileName, codec, ep);
            bp.Dispose();
            g.Dispose();

        }
    }
}

[/code]

Cool, could you provide a link to the old post, I tried Googling but couldn't find it (or fix the codesample in this post)?

Mmmm another try:

[code]

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using umbraco;
using umbraco.cms;
using umbraco.cms.businesslogic.member;
using umbraco.cms.businesslogic.web;
using umbraco.BusinessLogic;
using umbraco.cms.businesslogic.media;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Xml;


namespace umbraco.presentation.usercontrols
{
    public partial class MediaUpload : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            string mediaPath = "";
            if (FileUpload1.HasFile)
            {

                    FileUpload1.SaveAs(@"C:\\temp\" + FileUpload1.FileName);
                   
                    string _text = FileUpload1.PostedFile.FileName;
                    string filename;
                    string _fullFilePath;
                    filename = _text.Substring(_text.LastIndexOf("\\") + 1, _text.Length - _text.LastIndexOf("\\") - 1).ToLower();
                
                    var imageType = MediaType.GetByAlias("Image");
                    //ROOT NODE Onder welke Media folder je hem opslaat!!!
                    Media m = Media.MakeNew(filename, imageType, new User(0), 1045);

                    // Create a new folder in the /media folder with the name /media/propertyid
                    System.IO.Directory.CreateDirectory(System.Web.HttpContext.Current.Server.MapPath(GlobalSettings.Path + "/../media/" + m.Id.ToString()));
                    _fullFilePath = System.Web.HttpContext.Current.Server.MapPath(GlobalSettings.Path + "/../media/" + m.Id.ToString() + "/" + filename);
                    FileUpload1.PostedFile.SaveAs(_fullFilePath);


                    // Save extension
                    string orgExt = ((string)_text.Substring(_text.LastIndexOf(".") + 1, _text.Length - _text.LastIndexOf(".") - 1));
                    orgExt = orgExt.ToLower();
                    string ext = orgExt.ToLower();
                    try
                    {
                        m.getProperty("umbracoExtension").Value = ext;
                    }
                    catch { }

                    // Save file size
                    try
                    {
                        System.IO.FileInfo fi = new FileInfo(_fullFilePath);
                        m.getProperty("umbracoBytes").Value = fi.Length.ToString();
                    }
                    catch { }

                    // Check if image and then get sizes, make thumb and update database
                    if (",jpeg,jpg,gif,bmp,png,tiff,tif,".IndexOf("," + ext + ",") > 0)
                    {
                        int fileWidth;
                        int fileHeight;

                        FileStream fs = new FileStream(_fullFilePath,
                            FileMode.Open, FileAccess.Read, FileShare.Read);

                        System.Drawing.Image image = System.Drawing.Image.FromStream(fs);
                        fileWidth = image.Width;
                        fileHeight = image.Height;
                        fs.Close();
                        try
                        {
                            m.getProperty("umbracoWidth").Value = fileWidth.ToString();
                            m.getProperty("umbracoHeight").Value = fileHeight.ToString();
                        }
                        catch { }

                        // Generate thumbnails
                        string fileNameThumb = _fullFilePath.Replace("." + orgExt, "_thumb");
                        generateThumbnail(image, 100, fileWidth, fileHeight, _fullFilePath, ext, fileNameThumb + ".jpg");

                        image.Dispose();
                    }
                    mediaPath = "/media/" + m.Id.ToString() + "/" + filename;

                    m.getProperty("umbracoFile").Value = mediaPath;
                    m.XmlGenerate(new XmlDocument());

                  
            }
        }
        protected void generateThumbnail(System.Drawing.Image image, int maxWidthHeight, int fileWidth, int fileHeight, string fullFilePath, string ext, string thumbnailFileName)
        {
            // Generate thumbnail
            float fx = (float)fileWidth / (float)maxWidthHeight;
            float fy = (float)fileHeight / (float)maxWidthHeight;
            // must fit in thumbnail size
            float f = Math.Max(fx, fy); //if (f < 1) f = 1;
            int widthTh = (int)Math.Round((float)fileWidth / f); int heightTh = (int)Math.Round((float)fileHeight / f);

            // fixes for empty width or height
            if (widthTh == 0)
                widthTh = 1;
            if (heightTh == 0)
                heightTh = 1;

            // Create new image with best quality settings
            Bitmap bp = new Bitmap(widthTh, heightTh);
            Graphics g = Graphics.FromImage(bp);
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;

            // Copy the old image to the new and resized
            Rectangle rect = new Rectangle(0, 0, widthTh, heightTh);
            g.DrawImage(image, rect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);

            // Copy metadata
            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo codec = null;
            for (int i = 0; i < codecs.Length; i++)
            {
                if (codecs[i].MimeType.Equals("image/jpeg"))
                    codec = codecs[i];
            }

            // Set compresion ratio to 90%
            EncoderParameters ep = new EncoderParameters();
            ep.Param[0] = new EncoderParameter(Encoder.Quality, 90L);

            // Save the new image
            bp.Save(thumbnailFileName, codec, ep);
            bp.Dispose();
            g.Dispose();

        }
    }
}

[/code]

Ok posted it on my dropbox: http://dl.dropbox.com/u/3055426/fileupload.zip

is working on a reply...