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Is it possible to create a datatable from the LINQ?
Message
 
 
À
15/08/2013 19:17:08
Information générale
Forum:
ASP.NET
Catégorie:
Code, syntaxe and commandes
Versions des environnements
Environment:
C# 4.0
OS:
Windows 7
Network:
Windows 2003 Server
Database:
MS SQL Server
Application:
Web
Divers
Thread ID:
01580581
Message ID:
01580640
Vues:
38
>>Hi everybody,
>>
>>I am attempting the following LEFT JOIN LINQ query based on 2 datatables:
>>
>>
>>    var resultingQuery = from instructors in dtResources.AsEnumerable()
>>                                    join bookings in dtBookingInfo.AsEnumerable()
>>                                    on instructors.Field<String>("resource1") equals bookings.Field<String>("resource1")
>>                                    into AllInfo
>>                                    from bookings in AllInfo.DefaultIfEmpty()
>>                                    select new
>>                                    {
>>                                       resource1 = instructors.Field<String>("resource1")
>>                                    };
>>
>>               return resultingQuery.CopyToDataTable<DataRow>();
>>
>>The last line is wrong and doesn't compile and I can not get CopyToDataTable to show up in intellisense. I am wondering if there is any other way to move result of the query into a data table? Since I am creating a new anonymous type I suspect I am out of luck, right? The reason is I need to pass a data table to the method that generates my final result as a string.
>>
>>In VFP this is the code I am trying to translate:
>>
>>
>>select I.instr_id as resource1, I.fname, I.lname, I.CheckedIn, ;
>>         b.booking_id, b.start_time, b.end_time, b.flex_tspan, ;
>>         b.layer, b.backcolor, b.forecolor, b.clip_sp, b.clip_loc, ;
>>         padr(space(iif(b.locked,2,0))+iif(empty(b.department+b.category+b.item), ;
>>         replicate('**'+alltrim(b.lsndescrip)+'** ',40), ;
>>         alltrim(b.modifiers)+' '+proper(alltrim(b.gst_name))+' '+alltrim(b.lsndescrip)+' '+ ;
>>         alltrim(str(b.booking_id,16))),200) as display_msg, 'PVT' as bartype, b.locked, ;
>>         iif(nvl(b.notelength,0)>0, .t., .f.) as isnotes;
>>         from csrInstr2 I;
>>         left outer join csrBookInfo b on I.instr_id==b.resource1 ;
>>         into cursor csrRetCursor ;
>>         order by &lcOrder
>>
>>I found this blog post http://blogs.msdn.com/b/aconrad/archive/2007/09/07/science-project.aspx which is above my head :(
>
>CopyToDataTable needs an IEnumberable of DataRows. We've discussed this before. See message 1573336. The code I gave you there is basically a simpler and less tested version of what was in the blog post.

Kudos for your consistently expert advice. I read everything you post, and not just because I like all things Wisconsin ;-)
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