c# Programming Glossary: qry
Linq “Could not translate expression… into SQL and could not treat it as a local expression.” http://stackoverflow.com/questions/1264985/linq-could-not-translate-expression-into-sql-and-could-not-treat-it-as-a-loc inside the database a slightly different example var qry from cust in ctx.Customers and tel select new cust.Name FormattedNumber..
LINQ Group By Multiple fields -Syntax help http://stackoverflow.com/questions/1869001/linq-group-by-multiple-fields-syntax-help cms.Key.OrderDate Count cms.Count Example 2 incorrect var qry cust.GroupBy p p.Customer q q.OrderDate k1 k2 group new Key1.. the dot notation that you do in the query expression var qry cust.GroupBy cm new cm.Customer cm.OrderDate key group new..
How to write Asynchronous LINQ query? http://stackoverflow.com/questions/252355/how-to-write-asynchronous-linq-query void Main string args this could be your linq query var qry TestSlowLoadingEnumerable We begin the call and give it our.. to an error handler AsynchronousQueryExecutor.Call qry HandleResults HandleError Console.WriteLine Call began on seperate..
Use linq to generate direct update without select http://stackoverflow.com/questions/445033/use-linq-to-generate-direct-update-without-select as necessary then call SubmitChanges . For example var qry from product in dc.Products where Product.Name 'Foobar' select.. where Product.Name 'Foobar' select product var item qry.Single item.Count 0 dc.SubmitChanges If you wish to do batching.. 0 dc.SubmitChanges If you wish to do batching var qry from product in dc.Products where Product.Type 1 select product..
LINQ to SQL using GROUP BY and COUNT(DISTINCT) http://stackoverflow.com/questions/448203/linq-to-sql-using-group-by-and-countdistinct ctx.Log Console.Out log TSQL to console var qry from cust in ctx.Customers where cust.CustomerID group cust.. grp.Select x x.City .Distinct .Count foreach var row in qry.OrderBy x x.Country Console.WriteLine 0 1 row.Country row.Count.. c.CustomerID '' GROUP BY c.Country ORDER BY c.Country var qry2 ctx.ExecuteQuery QueryResult sql foreach var row in qry2 Console.WriteLine..
How do you perform a left outer join using linq extension methods http://stackoverflow.com/questions/584820/how-do-you-perform-a-left-outer-join-using-linq-extension-methods c# linq to sql lambda share improve this question var qry Foo.GroupJoin Bar foo foo.Foo_Id bar bar.Foo_Id x y new Foo..
Is LinqToSQL powerful enough? Isn't a more powerful but equally fluent interface easy to construct? http://stackoverflow.com/questions/640004/is-linqtosql-powerful-enough-isnt-a-more-powerful-but-equally-fluent-interface in a single class we can write something like this where qry is an instance of our query class var ListOfEnrollees qry.Command.. qry is an instance of our query class var ListOfEnrollees qry.Command Select b.FirstName b.LastName b.ID From ClassEnroll..
Random row from Linq to Sql http://stackoverflow.com/questions/648196/random-row-from-linq-to-sql pick one at random Skip First . for count approach var qry from row in ctx.Customers where row.IsActive select row int.. in ctx.Customers where row.IsActive select row int count qry.Count 1st round trip int index new Random .Next count Customer.. round trip int index new Random .Next count Customer cust qry.Skip index .FirstOrDefault 2nd round trip share improve this..
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