Set sort-order field based on alphabetically ordering of another field

I've recently added a couple of fields to some tables in my database (SQL Server 2005) to allow users to customize the sort order of the rows. I've followed this pattern for all of the tables:

-- Alter the InvoiceStatus table
ALTER TABLE [dbo].[InvoiceStatus] ADD [Disabled] bit NOT NULL DEFAULT 0
ALTER TABLE [dbo].[InvoiceStatus] ADD [SortOrder] int NOT NULL DEFAULT 0
-- Use the primary key as the default sort order
UPDATE [dbo].[InvoiceStatus]
   SET [SortOrder] = [InvoiceStatusId]

Normally, as you can see, I've used the primary key as the default sort order. Now I am however in the situation that I would like to use the alphabetical ordering of a text field in the table as the default sort order.

Using the above table as an example (which has a text field [InvoiceStatusName]), is there a similar nice and short query I could write to use the alphabetical ordering of [InvoiceStatusName] as the default sort order?

Update: The question is already answered, but some has pointed out that this solution might not be ideal so I just want to add some context for future references. This is an old system (not legacy-old, but it has been around for quite some years) in use a handful of different places.

There are several lists/drop-downs in the application with your typical "status" type (such as invoice status, order status, customer type etc.). Back when the system was first written these were standard values in use every place (not meant to be changed in any way), but some users have started to request the ability to add new statuses, remove those no longer in use and specify a custom sort order (one status might be more frequently used, and it is thus nice to have it at the top of the list).

The easiest way I found to do this (without having to mess around with too much of the old code) was to add two new fields, Disabled and SortOrder, to all the relevant tables. The Disabled field is used to "hide" un-used types (cannot delete them because of referential integrity, and the value they hold does also need to be kept), and the SortOrder field is there so the users can specify their own custom sort order. Since all the relevant tables also share these same two columns, it was very easy to make a simple interface to handle the sorting (and disabling) in a generic way.


   ROW_NUMBER() OVER (ORDER BY InvoiceStatusName) AS rn
FROM   dbo.InvoiceStatus
UPDATE so SET SortOrder = rn

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