Programmatically applying themes

//Open site collection object
using (SPSite mySite = new SPSite("http://SiteUrl"))
{

// Open site
using (SPWeb oWeb= mySite .OpenWeb())
{
oWeb.ApplyTheme("<theme to be applied>");
oWeb.Update();
}
}

Programmtically list all attachements in a List

public void fnListAttachments(string site, string listName)
{
    StringBuilder strAttachNames= new StringBuilder();
    using (SPSite oSite = new SPSite(site))
    {
        using (SPWeb oWeb = oSite.OpenWeb())
        {
            SPList oList = oWeb.Lists[listName];

            SPListItemCollection oListItems = oList.Items;
            foreach (SPListItem item in oListItems)
            {
                SPAttachmentCollection attachmentscol= item.Attachments;

                if (attachmentscol.Count <= 0) return string.Empty;

                foreach (var attachment in attachmentscol)
                {
                    strAttachNames.Append(attachment.ToString());
                }
            }
        }
    }
    //return strAttachNames.ToString();
}

Feature handler to save documents to physical folder

  SPSite site = new SPSite(properties.SiteId);

        using (SPWeb web = site .OpenWeb()) {

            string folderName = "";

            SPFolder cols = web.Folders[site.Url + "/TestDocumentLib"];

            SPList list = web.Lists["TestDocumentLib"];

            SPDocumentLibrary docLibrary = (SPDocumentLibrary)list;

            SPListItem listItem = docLibrary.GetItemById(properties.ListItemId);

            SPFile file1 = web.GetFile(listItem.UniqueId);

            string strUrl = file1.ServerRelativeUrl.ToString();

            string destinationFolderUrl = @"C:\Documents and Settings\Documents\";

            byte[] binfile = file1.OpenBinary();

            string strRootUrl = list.RootFolder.ServerRelativeUrl.ToString();

            int count = strUrl.Split('/').Length - 1;

            string[] str = strUrl.Split('/');

            for (int i = 1; i < count; i++)

            {

                destinationFolderUrl += str[i] + "\\" + folderName;

            }

            SPSecurity.RunWithElevatedPrivileges(delegate()

           {

               if (!(Directory.Exists(destinationFolderUrl)))

               {

                   Directory.CreateDirectory(destinationFolderUrl);

                   FileStream fstream = System.IO.File.Create(destinationFolderUrl + "\\" + file1.Name);

                   fstream.Write(binfile, 0, binfile.Length);

                   fstream.Close();

               }

               else

               {

                   //Directory.CreateDirectory(destinationFolderUrl);

                   FileStream fstream = System.IO.File.Create(destinationFolderUrl + "\\" + file1.Name);

                   fstream.Write(binfile, 0, binfile.Length);

                   fstream.Close();

               }

           });

        }

}

List Template IDs

List template name	ListTemplateID
NoListTemplate	0
GenericList	100
DocumentLibrary	101
Survey	102
Links	103
Announcements	104
Contacts	105
Events	106
Tasks	107
DiscussionBoard	108
PictureLibrary	109
DataSources	110
WebTemplateCatalog	111
UserInformation	112
WebPartCatalog	113
ListTemplateCatalog	114
XMLForm	115
MasterPageCatalog	116
NoCodeWorkflows	117
WorkflowProcess	118
WebPageLibrary	119
CustomGrid	120
SolutionCatalog	121
NoCodePublic	122
ThemeCatalog	123
DataConnectionLibrary	130
WorkflowHistory	140
GanttTasks	150
Meetings	200
Agenda	201
MeetingUser	202
Decision	204
MeetingObjective	207
TextBox	210
ThingsToBring	211
HomePageLibrary	212
Posts	301
Comments	302
Categories	303
Facility	402
Whereabouts	403
CallTrack	404
Circulation	405
Timecard	420
Holidays	421
IMEDic	499
ExternalList	600
IssueTracking	1100
AdminTasks	1200
HealthRules	1220
HealthReports	1221
InvalidType	-1

Updating values to People & Group field in Sharepoint list

string strAccountName = string.Empty;
                                for (int i = 0; i < userPicker.ResolvedEntities.Count; i++)
                                {
                                    PickerEntity objEntity = (PickerEntity)userPicker.ResolvedEntities[i];
                                    SPUserInfo objInfo = new SPUserInfo();

                                    objInfo.LoginName = objEntity.Key;
                                    strAccountName = objInfo.LoginName;
                                  
                                    if (objEntity.EntityData["SPUserID"] != null)
                                    {
                                        // to return a sharepoint people group formatted string use...
                                        strAccountName = objEntity.EntityData["SPUserID"].ToString() + ";#" + objEntity.DisplayText.ToString();
                                    }
                                    if (objEntity.EntityData["SPGroupID"] != null)
                                    {
                                        // to return a sharepoint people group formatted string use...
                                        strAccountName = objEntity.EntityData["SPGroupID"].ToString() + ";#" + objEntity.DisplayText.ToString();
                                    }
                                }


    item["ColumnName"] = strAccountName;