Lookup fields are great. They can show information from other lists. I have never noticed before, that the only two supported field types for lookups are SPFieldText and SPFieldCalculated.
All other field types can not be used as source for lookup fields.
A while ago Microsoft released some filter Webparts on MSDN.
SharePoint Filter Webparts including:
– BDC MultiFilter: Similar to the BDC Data Item Builder web part provided with MOSS 2007 Enterprise Edition, except it provides up to 4 additional filter connections containing BDC entity attributes to allow display of more entity-related data
– ShowFilter: Diagnostic display of any filter connected
– ShowFilterMap: Displays a Virtual Earth map when passed a filter containing a street address
– ShowFilterSearch: Displays MOSS search results when passed a filter connection containing a search query
You can find a Webpart for displaying data from SharePoint lists as Charts on CodePlex.
The feature list:
Die SharePoint Konferenz 2009 findet am 11. und 12. Februar in München statt.
Auf der Konferenz werde ich einen Vortrag “Best Practices in der Webpart-Entwicklung” halten.
Voraussichtlich werde ich die folgenden Themen behandeln:
· Fallen umgehen und Probleme vermeiden
· Logging in das SharePoint Log
· Webparts mit eigenen ToolParts
· Nutzung “ToHtml” Funktionen
· Berechtigungsprüfung
· Code Ausführung mit erweiterten Berechtigungen
· SharePoint Webcontrols
· SPContext – wo bin ich
Quote: Microsoft wants to help developers build better quality code that manages available memory better.
Source: http://blogs.msdn.com/sharepoint/archive/2008/11/12/announcing-spdisposecheck-tool-for-sharepoint-developers.aspx
References:
Best Practices: Using Disposable Windows SharePoint Services Objects
Best Practices: Common Coding Issues When Using the SharePoint Object Model
This Webpart will show Sitecollections from the current Webapplication or Subwebs from the current web.
In the Webpart properties you can choose what the Webpart will show.
It uses the Logo URL of websites, if they are specified. The description of the website will show up as tooltip.
I am using the RepeatedControls class to build the items. This class really makes it easy to add entries by moving the layout functionality into an own class.
If you want to create a tooltip to show additional information, you can use the SharePoint functionality to do so. E.g. on a list of websites you could show the website’s description, if the user moves the mouse over the element.
The JavaScript which will show the “Open Menu” text is “MMU_PopMenuIfShowing(this);”. It is referenced on all SharePoint sites through the call to Init.js in the header.
CompleteSharePoint.Net will bring new features to your WSS V3 installation. Some new features are:
The project is also available on http://www.codeplex.com/completesharepoint.
Microsoft has released many updates for Office 2007.
SharePoint relevant updates:
Imagine you have a list (or document library) which has lots of items. Nothing fancy here. Now add a lookup or user field and allow it to contain multiple values.
Inside a view for this list you can filter e.g. for the title column. The filter dropdown shows all possible values for the column. 
Here comes the clue. If the item count of the list reaches a number somewhere between 400 and 500 items, the filter dropdown changes. You will get an option to show all filter values. This is for performance reasons.
There is a Wiki out there with code samples and articles about SharePoint. Check it out at http://www.wsswiki.com/
After you install a hotfix or update for SharePoint, you have to run the SharePoint Configuration Wizard. Sometimes it is aborting with an error. You will get a link to a log file. This is something like “PSCDiagnostics_10_17_2008_16_53_57_799_923424762.log”.
In my case I got a timeout error:
———————————————————-
10/17/2008 16:55:59 1 ERR Fehler beim Initialisieren des Updates der SharePoint-Produkte und -Technologien.
Eine Ausnahme vom Typ ‘System.ServiceProcess.TimeoutException’ wurde ausgelöst. Weitere Ausnahmeinformationen: Der Vorgang wurde nicht abgeschlossen, da der Timeout abgelaufen ist.
System.ServiceProcess.TimeoutException: Der Vorgang wurde nicht abgeschlossen, da der Timeout abgelaufen ist.
bei System.ServiceProcess.ServiceController.WaitForStatus(ServiceControllerStatus desiredStatus, TimeSpan timeout)
bei Microsoft.SharePoint.PostSetupConfiguration.ServiceHelper.Stop(String serviceName)
bei Microsoft.SharePoint.PostSetupConfiguration.InitializeTask.StopServicesListedInRegistry(RegistryHelper registry)
bei Microsoft.SharePoint.PostSetupConfiguration.InitializeTask.StopAllServices()
bei Microsoft.SharePoint.PostSetupConfiguration.InitializeTask.PrepareForUpgrade()
bei Microsoft.SharePoint.PostSetupConfiguration.InitializeTask.Run()
bei Microsoft.SharePoint.PostSetupConfiguration.TaskThread.ExecuteTask()
As you might already know, you can create new fields with SPFieldCollection.AddFieldAsXml(string schema). The schema contains the formula for the calculated field. There are some points to take care of, before you can add the field:
Changing the fieldnames is an easy task. If you read the schema from a field and want to create a new one with the same formula, you will get something like “=if(fieldA,1,2)”.
