Programmatically create folder if not exists and resize and upload image into sharepoint document library

SPSecurity.RunWithElevatedPrivileges(delegate()

                {

                    using (SPSite sysSite = new SPSite(SPContext.Current.Site.Url))

                    {

                        using (SPSite oSite = new SPSite(SPContext.Current.Site.Url, sysSite.SystemAccount.UserToken))

                        {

                            using (SPWeb oWeb = oSite.OpenWeb())

                            {

                                oWeb.AllowUnsafeUpdates = true;

                                if (radAsyncUpload1.UploadedFiles.Count > 0)

                                {

                                    string sFolderName = "MatrimonialThumbnail";

                                    sFileName = Convert.ToString(DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss")).Replace("/", "").Replace(" ", "").Replace(":", "") + "_EIcon" +  radAsyncUpload.UploadedFiles[0].GetExtension();

                                    byte[] m_byt = new byte[radAsyncUpload1.UploadedFiles[0].ContentLength + 1];

                                    using (System.IO.FileStream fStream = (System.IO.FileStream)radAsyncUpload1.UploadedFiles[0].InputStream)

                                    {

                                        byte[] contents = new byte[fStream.Length];

                                        fStream.Read(contents, 0, (int)fStream.Length);

                                        SPList lstPublicImage = oWeb.Lists["Public"];

                                        SPFolder subFolder = null; //oWeb.Lists["Public Images"].RootFolder;

                                        bool folderExists = false;

                                        // Check to see if folder already exists, if not create it

                                        for (int i = 0; i < lstPublicImage.Folders.Count; i++)

                                        {

                                            if (string.Compare(lstPublicImage.Folders[i].Folder.Name.ToLower(), sFolderName.ToLower()

                                                , true) == 0)

                                            {

                                                subFolder = lstPublicImage.Folders[i].Folder;

                                                folderExists = true;

                                            }

                                        }

                                        if (!folderExists)

                                        {

                                            SPFolderCollection _folders = lstPublicImage.RootFolder.SubFolders;

                                            _folders.Add(oWeb.Lists["Public"].RootFolder.Url + "/" + sFolderName);

                                            lstPublicImage.Update();

                                            subFolder = lstPublicImage.Folders[lstPublicImage.Folders.Count - 1].Folder;

                                        }

                                        SPFile sps = null;

                                        // resize image

                                        System.Drawing.Image originalImage = null;

                                        originalImage = System.Drawing.Image.FromStream(fStream);

                                        if (originalImage.Width > 24 || originalImage.Height > 24)

                                        {

                                            System.Drawing.Image thumbnail = null;                                                                    

                                            MemoryStream msOut = new MemoryStream();

                                            thumbnail = originalImage.GetThumbnailImage(22, 22, null, IntPtr.Zero);

                                            thumbnail.Save(msOut, System.Drawing.Imaging.ImageFormat.Png);

                                            sps = subFolder.Files.Add(sFileName, msOut, true);

                                        }

                                        else

                                        {

                                            sps = subFolder.Files.Add(sFileName, fStream, true);

                                        }

                                        //                                       

                                        sps.Update();

                                    }

                                }

                                oWeb.AllowUnsafeUpdates = false;

                            }

                        }

                    }

                });

WebProvisioned web event - Feature Stapling - sharepoint 2010

WebProvisioned web event receiver -allow to add new additional logic when a site is created-is a new receiver type in SharePoint 2010. This operates at site collection level only.

<Receivers Scope="Site">

You can specify scope to "Site" or "Web" & acoordingly receiver will act SPSite.EventReceivers or SPWeb.EventReceivers

Feature Stapling -allow to add new additional logic when a site is created- will affect whole farm.

SharePoint 2010 Property Bag - Read / Write data to Property Bag

Property Bag = hash table of Key-Value pairs

Read / Write data to Property Bag

SPSecurity.RunWithElevatedPrivileges(delegate()

        {

        try

        {

            using (SPSite RootSite = new SPSite(URL))

            {

                using (SPWeb SiteCollection = RootSite.OpenWeb())

                {                   

                    try

                    {

                        SiteCollection.AllowUnsafeUpdates = true;

                       // Get connection string from Property bag

                        if (SiteCollection.AllProperties.ContainsKey("ConnectionString"))

                        {

                            ConnectionString = SiteCollection.AllProperties["ConnectionString"].ToString();

                        }                       

                        // Set siteID in the Property bag

                        SiteCollection.Properties["siteID"] = siteID;

                        SiteCollection.Properties.Update();

                        SiteCollection.AllowUnsafeUpdates = false;                       

                    }

                    catch (Exception ex)

                    {

                      //Handle Exception 

                    }          

                }

            }

        }

        catch(Exception ex)       

        {           

        }

        }); 

http://pbs2010.codeplex.com/