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Getting Foreign Key information of an ADO.Recordset Field

Posted on 2004-10-27
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Hi,

I am writing a VB6 application that is designed to be generic so a lot of meta-data is stored in SQL Server 2000 database, with controls being dynamically added to forms based on database settings.  

Currently in my metadata table I have a column called DataListSQL which is used to store the SQL required to populate the combobox control, and have another field to say what type of control it is (Combobox, Textbox, Checkbox, Label).

I want to miminise the amount of work required for the administration so I was hoping to programmatically determine the type of control to be displayed based on the field data type.  The problem is I don't know how to determine from the Adodb.recordset if a field is a foreign key and so should be a combobox.  If it is a foreign key column I would like to know the foreign key table and column name so I can select all the values from this table to populate the combobox control.

I hope this makes sense to people outside my head ;)
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Question by:osullil
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leonstryker earned 1000 total points
ID: 12422658
You have two options here.  The first option is to add a column to your table which will identify if the column is part of a foreign key, or you may run the sp_fkeys system store procedure in order to retrieve this information:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/tsqlref/ts_sp_fa-fz_65yr.asp

Leon
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by:osullil
ID: 12424588
The second option is the best as I want to remove as much of the meta data information to try and minimise the margin of error when configuring.  I had hoped though that there would be some way to get information through ADO recordset to avoid having to send another query to database.
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by:leonstryker
ID: 12424680
>>I had hoped though that there would be some way to get information through ADO recordset to avoid having to send another query to database.

You should create a store procedure which does this for you.  That way you would still need to make only one call the server.

Leon
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by:osullil
ID: 12432392
Stored procedure would be a little tricky seeing as the query to retrieve data is programmatically generated based on meta data table which stores table and column names used by the dynamic controls.  I will add the sp_fkeys call as part of this batch though so still only one call to server and use the rs.Nextrecordset to get to foreign keys recordset.

Thanks for the help on this
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