How to simulate the SQL WHERE IN clause in a SPQuery

Simulate a WHERE IN clause in a SPQuery

If you ever have used something like

 

in T-SQL, and wanted to mimic this functionality in the SharePoint SPQuery class, you probably have found out there is no IN statement in the CAML Query language.
So what do do? Here’s a way to simulate WHERE IN clause in a SPQuery statement.

One solution is to use a LinQ query that looks something like this:

However, this has a serious performance problem. Because the .AllItems property will do a full T-SQL select all items behind the scenes, it can get very slow if you have thousands and thousand of items in your list.
It do look elegant, however.

Another way is to build up a CAML query that does an OR statement for every item that you have in your list of values.
Essentially, you will have to build up something that looks similar to this CAML query:

 

Notice that the CAML syntax for multiple OR statements is a little bit odd. You would at first glance think that is would look like this:

But this will throw an error. You will need to have nest the OR statements within each other.

For this purpose I have written a small helper method that will build the CAML query for a given list of values in a List of strings.
You call it like this:

The first parameter is the field that you want to comapre on, the second parameter is the type (“Eq” makes most sense in this scenario), and the third parameter is of List of strings.
Here’s the code for the helper method:

Microsoft SharePoint 2007 June 2010 CU published

Today Microsoft published the June 2010 CU for SharePoint 2007. This CU also addresses the important security bulletin MS10-039. To read more about this CU, please follow these links:

MOSS 2007 KB983310

WSS 3.0 KB983311

This CU requires you to have the Service Pack 2 installed. And remember to either run the Configuratio Wizard or run this command: psconfig –cmd upgrade –inplace b2b -wait on all of your servers in the farm.

 

Here is a list of known updates for SharePoint 2010.

How to use the SPGridView filter together with a SPDataSource

Normally you will no problems finding examples on how to use the SPGridView together with an ObjectDataSource and use the filtering mechanism. But what about using the SPDataSource object?

This can also be done fairly simple. You do the basic things as you do using an ObjectDataSource object, however, there are two things that you will have to change.

1. The ObjectDataSource has a FitlerExpression property that set the filter for the data source. That isn’t available on the SPDataSource object. Instead we have the SelectCommand property. The format string for this property is the same as in a standard CAML Query where clause.

2. We will need to set the SPGridView DataSourceID property instead of the more normally used DataSource property.

3. We have to add the SPDataSource control to the Controls colelction of the Web Part.

So let’s look at some code samples.

First, we have our usual suspects, one SPGridView and one SPDataSource:

 

In our CreateChildControls() method ( if it’s in a Web Part), we can do much of the work. I have commented the code, so I will not say so much about it more.

SharePoint: How to apply ViewStyle in schema.xml

When you are customizing a SharePoint list with a custom schema.xml file, you may also want to set the ViewStyle for your View.

You do that by adding a <ViewStyle ID="xx"/> element within the <View> element. For exampl ID 17 corresponds to the "Shaded" view style.

Here’s a table with the common ViewStyles available, as defined in the <12 HIVE>\TEMPLATE\GLOBAL\XML\VWStyles.xml

0 Basic Table
12 Boxed, no labels
13 Boxed
15 Newsletter
16 Newsletter, no lines
17 Shaded
20 Preview Pane
0 Default

Using UserMulti field in the CAML schema

This was unexpected, and not documented at all in the SharePoint SDK.

When you create a UserMulti column, you must also specify Mult=”TRUE”, otherwise it will fall back to a standard (single select) User column type.

<Field ID=”{12312312-1234-1234-1234-123412341234}”


Group=”My Group”
Type=”UserMulti”
Mult=”TRUE”

 

SharePoint: Solution still deployed after retracting it

Solution still deployed after retracting

You maybe have stumbled upon this scenario: Solution still deployed after retracting it.

After you have retracted your SharePoint solution in Central Administration, the solution flips back to deployed?

The issue seems to be that when you have deployed your solution with –allcontenturls, which means it will be deployed to the Central Administration web application as well, you must specifically retract the solution from the Central Administration web application.

So here are the steps to work around this issue:

  1. Retract the solution from all content URLs
  2. Retract the solution from the Central Administration web application specifically

Getting Access denied for User Profiles and Properties

If you get access denied when trying to access the User Profiles and Properties page in SharePoint Central Administration,

you need to add the account you are using to the Manage Profiles in Shared Service Rights.

In Central Administration, go to your Shared Services page. Under User Profiles and My Sites, click on Personalization services permissions. Add the account your are using and select  Manage user profiles.

How to remove the My Site and My Links in SharePoint

If you want to remove the two links at the top of the page, My Site and My Links, follow these steps:

Start the Central Administration web application.

Click the "Shared Services Administration" link.

Locate the SSP that is managing the My Sites web site and click on it.

Go to User profiles and My Sites ->  Personalization services permissions.

Select the Authenticated Users group and click on Modify Permissions of Selected Users.

To disable My Site, un-check the Create personal site checkbox.

To disable My Links, un-check the Use personal features checkbox.

 

How to determine which databases SharePoint uses

In order to tell which databases your SharePoint 2007 / WSS 3.0  installation uses, you will have to look at multiple locations.

Content databases

Open Central Administration and go to Application Management  and then Content databases
Review for all Site Collection URLs

Shared Services Databases

Open Central Administration,  Application Management, Manage this Farm’s Shared Services
There you will find
SSP Database
and
Search Database

Configuration database

Look in the registry at:
HKLM\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\Secure\ConfigDB

SharePoint: How to select multiple default items in a choice field.

If you have a field in SharePoint that is setup as a choice field, and you want to have multiple default values, you can do the following:

Instead of selecting the Default option, select the Calculated Value and enter the items separated with semicolon and the hash sign.

Like this:

=";#Red;#Green;#Blue;#"