Hello,
I have 3 SQL tables:
[Tags] TagId, TagText
[Posts] PostId, TagId, ...
[Files] FileId, TagId, ...
I need to, using LINQ, select all records in Tags, including the
columns TagId and TagText, but adding a new column of type boolean
which is True if the tag is associated to a Post OR to a File, i.e.,
if the TagId exists in Posts or Files.
How can I do this?
Thanks,
Miguel
3  8154 
Miguel,
Have you used the new O/RM tool within Visual Studio 2008 to create the db
context?
You should then be able to express:
var query = from t in db.Tags
select new
{
TagId = t.TagId,
TagText = t.TagText,
hasPosts = t.Posts 0,
hasFiles = t.Files 0
};
This is supposed to work because LINQ to SQL exposes the foreign key
relationship as a collection at the object level.
Please lest me/us know how it goes!
Best regards
-Ralf http://www.24100.net
"shapper" <md*****@gmail. comwrote in message
news:11******** **************@ o3g2000hsb.goog legroups.com...
Hello,
I have 3 SQL tables:
[Tags] TagId, TagText
[Posts] PostId, TagId, ...
[Files] FileId, TagId, ...
I need to, using LINQ, select all records in Tags, including the
columns TagId and TagText, but adding a new column of type boolean
which is True if the tag is associated to a Post OR to a File, i.e.,
if the TagId exists in Posts or Files.
How can I do this?
Thanks,
Miguel
Did it work? Any feedback?
"Ralf Rottmann" <Be*****@live.c omwrote in message
news:BD******** *************** ***********@mic rosoft.com...
Miguel,
Have you used the new O/RM tool within Visual Studio 2008 to create the db
context?
You should then be able to express:
var query = from t in db.Tags
select new
{
TagId = t.TagId,
TagText = t.TagText,
hasPosts = t.Posts 0,
hasFiles = t.Files 0
};
This is supposed to work because LINQ to SQL exposes the foreign key
relationship as a collection at the object level.
Please lest me/us know how it goes!
Best regards
-Ralf
http://www.24100.net
"shapper" <md*****@gmail. comwrote in message
news:11******** **************@ o3g2000hsb.goog legroups.com...
>Hello,
I have 3 SQL tables:
[Tags] TagId, TagText
[Posts] PostId, TagId, ...
[Files] FileId, TagId, ...
I need to, using LINQ, select all records in Tags, including the
columns TagId and TagText, but adding a new column of type boolean
which is True if the tag is associated to a Post OR to a File, i.e.,
if the TagId exists in Posts or Files.
How can I do this?
Thanks,
Miguel
On Nov 9, 2:50 pm, "Ralf Rottmann \(www.24100.net \)"
<BeSh...@live.c omwrote:
Did it work? Any feedback?
"Ralf Rottmann" <BeSh...@live.c omwrote in message
news:BD******** *************** ***********@mic rosoft.com...
Miguel,
Have you used the new O/RM tool within Visual Studio 2008 to create the db
context?
You should then be able to express:
var query = from t in db.Tags
select new
{
TagId = t.TagId,
TagText = t.TagText,
hasPosts = t.Posts 0,
hasFiles = t.Files 0
};
This is supposed to work because LINQ to SQL exposes the foreign key
relationship as a collection at the object level.
Please lest me/us know how it goes!
Best regards
-Ralf
http://www.24100.net
"shapper" <mdmo...@gmail. comwrote in message
news:11******** **************@ o3g2000hsb.goog legroups.com...
Hello,
I have 3 SQL tables:
[Tags] TagId, TagText
[Posts] PostId, TagId, ...
[Files] FileId, TagId, ...
I need to, using LINQ, select all records in Tags, including the
columns TagId and TagText, but adding a new column of type boolean
which is True if the tag is associated to a Post OR to a File, i.e.,
if the TagId exists in Posts or Files.
How can I do this?
Thanks,
Miguel
Hello,
Sorry, I was out of work. I didn't try it yet.
I was trying to put this in a LINQ Data Source.
This is something I am not sure. Is it possible to use any LINQ query
in a LINQ Data Source?
Thanks,
Miguel This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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