Generating XML Schema from db tables - including field lengths

I'm working on a C# project that essentially features a dump of the
database (on SQL Server 2005) into an XML file, with schema.
Basically we want the users to be able to take this data anywhere, as
easily as is possible. I initially selected the information "For XML
Auto" etc. etc. but found that when I tested simple imports of that
XML with the likes of Access and Excel, those programs didn't take
well to the schema at all.
Switching gears, I queried the databases normally and did the XML
conversion in C# using the dataset.writeXML function with schema,
which generated schema that made Access and Excel much happier. The
only thing is that Access, upon creating tables based on the schema,
took the string fields to be text, rather than memo. (i.e.
varchar(255) instead of text) ... likewise, SQL Server, when
wrestling to create tables based on the schema, behaves similarly.
Mind you, when the tables are created beforehand, and just populated
with the XML data, that's fine, it works great.
I do realize that's how it's supposed to work, but I'm being asked to
generate a schema that includes maxLength for varchar fields -- even
though I doubt any program that would be importing this data would
even be able to read that from the schema and use it appropriately.
I'm hoping someone here can tell me there's a nicer way of doing that
than SELECTing FOR XML RAW and drawing up an XSLT.
Takers?
Did you use the xmlschema directive on FOR XML AUTO or RAW?
Best regards
Michael
"Matthew Dunphy" <leviathant@.gmail.com> wrote in message
news:1172246553.987853.109810@.j27g2000cwj.googlegr oups.com...
> I'm working on a C# project that essentially features a dump of the
> database (on SQL Server 2005) into an XML file, with schema.
> Basically we want the users to be able to take this data anywhere, as
> easily as is possible. I initially selected the information "For XML
> Auto" etc. etc. but found that when I tested simple imports of that
> XML with the likes of Access and Excel, those programs didn't take
> well to the schema at all.
> Switching gears, I queried the databases normally and did the XML
> conversion in C# using the dataset.writeXML function with schema,
> which generated schema that made Access and Excel much happier. The
> only thing is that Access, upon creating tables based on the schema,
> took the string fields to be text, rather than memo. (i.e.
> varchar(255) instead of text) ... likewise, SQL Server, when
> wrestling to create tables based on the schema, behaves similarly.
> Mind you, when the tables are created beforehand, and just populated
> with the XML data, that's fine, it works great.
> I do realize that's how it's supposed to work, but I'm being asked to
> generate a schema that includes maxLength for varchar fields -- even
> though I doubt any program that would be importing this data would
> even be able to read that from the schema and use it appropriately.
> I'm hoping someone here can tell me there's a nicer way of doing that
> than SELECTing FOR XML RAW and drawing up an XSLT.
> Takers?
>
|||Both -- when I used AUTO, it worked great except that it doesn't
output the maxlength for the varchar fields. Everything else it does
is kind of magical.
When I use RAW, it outputs each column, but again, nothing about the
(3000) for a row that is varchar(3000).
To be specific, the select statement that comes closest to what I want
looks basically like this:
SELECT *
FROM table
WHERE id=@.id
FOR XML AUTO, ELEMENTS, XMLDATA
(I do this for about a dozen tables)
In the resulting schema, the ElementType nodes have attributes for
name, content, model, and dt:type... is there some way to also specify
maxLength, based off the table schema in SQL server, so that I can do
a simple query like this -- or do I just have to bite the bullet and
write the schemas manually?
Thanks!
--Matt Dunphy
On Feb 24, 1:42 am, "Michael Rys [MSFT]" <m...@.online.microsoft.com>
wrote:[vbcol=seagreen]
> Did you use the xmlschema directive on FOR XML AUTO or RAW?
> Best regards
> Michael
> "Matthew Dunphy" <leviath...@.gmail.com> wrote in message
> news:1172246553.987853.109810@.j27g2000cwj.googlegr oups.com...
>
>
|||Actually... never mind that last post, I think you've pointed me in
the right direction. (That's what I get for posting first thing in
the morning!) Thanks for your help.
On Feb 26, 9:14 am, "Matthew Dunphy" <leviath...@.gmail.com> wrote:
> Both -- when I used AUTO, it worked great except that it doesn't
> output the maxlength for the varchar fields. Everything else it does
> is kind of magical.
> When I use RAW, it outputs each column, but again, nothing about the
> (3000) for a row that is varchar(3000).
> To be specific, the select statement that comes closest to what I want
> looks basically like this:
> SELECT *
> FROM table
> WHERE id=@.id
> FOR XML AUTO, ELEMENTS, XMLDATA
> (I do this for about a dozen tables)
> In the resulting schema, the ElementType nodes have attributes for
> name, content, model, and dt:type... is there some way to also specify
> maxLength, based off the table schema in SQL server, so that I can do
> a simple query like this -- or do I just have to bite the bullet and
> write the schemas manually?
> Thanks!
> --Matt Dunphy
>