c# - Entity Framework 4.0 won't let me use LINQ-to-Entities -

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maybe i'm over-worked ... i'm lost in project use ef4 db stuff.

as such, work indeed retrieve complete list of entity. when try filtering, don't it...

i have following code, in big trouble

public class infoviewmodel {     private trackerentities _context;      public infoviewmodel (int ticketid)     {         var ct = new trackerentities();         var res = t in ct.tickets                   t.ticketid    // vs2010 can't evaluate property 'ticketid'                   select t;  } }

i not understand why t.ticketid throws me wavy red line error message "can not resolve symbol 'ticketid'"

the symbol declared in edmx file, public getter , setter...

in fact, looks nothing of entity known in class.

why?

tia deepcore

1) should compare ticketid of entity desired match, , (recommended) should wrap context instance in using statement (it's idisposable):

private trackerentities _context;

public infoviewmodel(int ticketid)
{
var ct = new trackerentities();
var res = t in ct.tickets
wheret.ticketid == ticketid
select t;
}

2) try refreshing model; go edm designer, right click surface , select "update model database", maybe there error in schema.

3) make sure ticketid property same spelling , casing in edm.

4) make sure ticketid int and compare int in updated snippet above.


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