Code that must not be put in data source active() method

Recently I got this error when trying to update spec quantity in salesEditLines form.

Cannot edit a record in Sales order - Update table (SalesParmTable).
The values displayed in the form are not current, so an update or deletion cannot be made. To view the current values, on the Command menu, click Restore or press CTRL+F5.

Call stack shows nothing but suddenly system goes to the write() method of the SalesParmTable. It is strange that I didn't change any field but it fires SalesParmTable.write() data source method.

Comparing the modification, I found that my fellow developer put a field assignment code within the SalesParmTable.active() method, so the code will always be run repeatedly (not sure how many time per minute, but it is very often). Since system get message that a field has been changed, write method is fired although the stack trace does not show any indication why write() method is fired. Again, it is hard since debugger doesn't tell what previous event causing this write() method.

So then I remove the field assignment code from the datasource active() method and the problem is gone.
The lesson from this is that we must never put an field assignment code within datasource active() method. It should only contains code for changing field behavior such as alowedit, enabled, visible, etc.

Sharepoint error after change domain

After we rebuild a new Active Directory, my windows sharepoint service could not start.
It showed this error message :
The file exists. (Exception from HRESULT: 0x80070050).
I am sure this is due to SID change of new domain. After googling around I found this website that helps me solve the problem.
The point is that userinfo table in Admin_content_xxxx database has to be updated with the new sid. I use getsid tool to reveal my new sid.
However it shows sid in s-n-n format while sharepoint store sid in hex format. So I created a vb program that convert decimal sid string to hexadecimal. The code is copied from this blog.

Property owner is not available for database

Recently I got this error message when tried to see database properties :

Cannot show requested dialog.

Additional information:

Cannot show requested dialog. (SqlMgmt)

Property Owner is not available for Database ’[ ]’. This property may not exist for this object, or may not be retrievable due to insufficient access rights.

(Microsoft.SqlServer.Smo)

This happened after we established a new domain so I suspected that this is caused by orphaned SID since most of the time I created database with Windows credential. After googling I got sure answer that this is database owner problem, exactly due to sid being out of sych.

So based on idea from this blog, I run the following simple sql statement (SQL 2005):

exec sp_msforeachdb 'alter authorization on database::? to sa;'

This will reset database owner of all databases to sa. This statement is safe as the alter authorization statement is not applicable to system databases.

If you want to update a single database only just use this statement:

alter authorization on database::dbname to sa;

For SQL 2000, use this statement :

exec dbname..sp_changedbowner 'sa'