Jonas Nilsson shows an interesting approach for working with SPSite and SPWeb which must be disposed. Create a helper method WithWeb and send an Action parameter:

public void WithWeb(string uri, Action<SPWeb> action)
{
    using (SPSite site = new SPSite(uri))
    {
        using (SPWeb web = site.OpenWeb())
        {
            action(web);
        }
    }
}

Here is my implementation of this pattern:

var TimeToIgnore = new TimeSpan(0, 0, 0, 60); var created = (DateTime)properties.ListItem[SPBuiltInFieldId.Created]; var now = DateTime.Now; var span = now.Subtract(created); return span.CompareTo(this.TimeToIgnore) < 0;

The easiest way to get the server relative url of an SPListItem is to retrieve the property “ServerUrl”.

SPListItem item...
var url = item\["ServerUrl"\];

Use LINQ to check if user is in a group. Create an extension method.

public static bool InGroup(this SPUser user, SPGroup group)
{
  return user.Groups.Cast<SPGroup>()
    .Any(g => g.ID == group.ID);
}
```EDIT 2011-01-22: There is a shortcoming of this method. You won't get a user which is in group through a AD group. You'll get only users and ad groups. [But there is another method to check if a user is inside an AD group](/2012/01/16/check-if-a-user-is-in-a-ou/ "See my post about how to retrieve users from AD groups with PrincipalSearcher"). How could we combine them?... I think we must start from group this time, not from user:

public static bool HasUser(this SPGroup user, SPUser user) { var users = group.Users.Cast(); var samAccount = Regex.Replace(user.LoginName, @".*\\(.*)", “$1”, RegexOptions.None); var exists = users.Any(u => u.LoginName.Equals(user.LoginName)); if (!exists) { var ctx = new PrincipalContext(ContextType.Domain); foreach (var u in users) { var login = u.LoginName; var groupName = Regex.Replace(login, @".*\\(.*)", “$1”, RegexOptions.None); var grp = GroupPrincipal.FindByIdentity(ctx, IdentityType.Name, groupName); if (grp == null) continue; var principals = grp.GetMembers(true); exists = principals.Any(p => p.SamAccountName.Equals(samAccount, StringComparison.InvariantCultureIgnoreCase)); if (exists) break; } } return exists; }

The internal name of Rollup Image or Upplyft bild is PublishingRollupImage

After debugging I have found the Content Type Ids for Image, Audio and Video in the assets library. These content type ids are not present in SPBuiltInContentTypeId.

public class SPBuiltInContentTypeIdExtension
{
  public static SPContentTypeId Video =
    new SPContentTypeId
     ("0x0101009148F5A04DDD49CBA7127AADA5FB792B00291D173ECE694D56B19D111489C4369D");
  public static SPContentTypeId Audio =
    new SPContentTypeId
      ("0x0101009148F5A04DDD49CBA7127AADA5FB792B006973ACD696DC4858A76371B2FB2F439A");
  public static SPContentTypeId Image =
    new SPContentTypeId
      ("0x0101009148F5A04DDD49CBA7127AADA5FB792B00AADE34325A8B49CDA8BB4DB53328F214");
}

These three asset content types inherit from Document CT (“0x0101”) and have “0x0101009148F5A04DDD49CBA7127AADA5FB792B” in common, which is the content type id for multimedia content type. So if you want to check if it is a multimedia, use this id. You can see the content type id when you go to Site Actions - Site Settings - Content Types. Click on a content type you interested in. In the address bar of your browser find ?ctype=.

Ett bra exempel finns här.

using System.Text.RegularExpressions;
...
const string HTML\_TAG\_PATTERN = "<.\*?>";

static string StripHTML (string inputString)
{
return Regex.Replace(inputString, HTML\_TAG\_PATTERN, string.Empty);
}

Känns licenser för Sharepoint är ett djungel. Läs det här bloginlägget.

Det finns ett intressant projekt som kan hjälpa att strukturera css-filer. Du skriver regler i en kombination av css och javascript. Det omvandlas med hjälp av js till css. Projektet heter less.js, läs mer om detta på sharepointoverflow.

Diskussioner sparas i en vanlig lista. En ny tråd sparas som en folder. Alla svar sparas som SPListItem i den foldern. En folder är så klart också en SPListItem, fast har en annan typ. För att se om det är en tråd, kan man jämföra ett fält som har ett guid som man kommer åt via SPBuiltInFieldId.FSObjType.  

var item = properties.ListItem;
var type = Convert.ToInt32(item\[SPBuiltInFieldId.FSObjType\]);
var foldertype = (int) SPFileSystemObjectType.Folder;
if (type == foldertype)
{
	//Yes, this is the thread head
	var body = item\["Body"\].ToString();
}