// Note the use of a compound key. Files that match// all three properties belong to the same group.// A named type is used to enable the query to be// passed to another method. Anonymous types can also be used// for composite keys but cannot be passed across method bou...
// Note the use of a compound key. Files that match// all three properties belong to the same group.// A named type is used to enable the query to be// passed to another method. Anonymous types can also be used// for composite keys but cannot be passed across method b...
capabilities by calling a particular query operator on the result of a query expression. For example, the following example uses theEnumerable.Unionmethod to combine the results of two queries into one query result. It uses theEnumerable.ToListmethod to return the query result as a generic list...
When the caller has enumerated all the chunk items, theChunk.GetEnumeratormethod has copied all chunk items. If theChunk.GetEnumeratorloop didn't enumerate all elements in the chunk, do it now to avoid corrupting the iterator for clients that might be calling it on a separate thread. ...
The associated source code weighs in at around 1,000 lines, much of it focused on filling in the two listboxes and the HTML detail content. The search performed on the main form calls into this lookup form through the InitiateSearch method. The actual database search for matching items occ...
Distinct is an extension method on the System.Linq.Enumerable class (which implements the standard query operators) that we can call on the string array (which supports IEnumerable) in order to get the distinct set of items from the collection. (For more information on extension methods, see ...
Your team wants a unique query that returns all products within the container regardless of category. Recall that we used the type property to separate our category items from the individual product items. Here, we're going to create a cross-partition query using the LINQ method syntax....
.NET'sSystem.ReflectionandSystem.Reflection.EmitAPIs and is meant to address many of the shortcomings of the core Java reflection API, which offers rather limited and cumbersome support for generic type inspection. Its code generation facilities include aTypeBuilder,MethodBuilder, and a bytecode ...
It’s important to name the property returned by the aggregate function, because LINQ is unable to derive one based on the method. If you forget to do this, both VB and C# will give a compiler error explaining the problem. Note Visual Basic has an Aggregate operator for LINQ that you ca...
I'm not going to try to explain this method, other than to say it essentially builds a predicate expression for all the values using the valueSelector (i.e. p => p.Firstname) and ORs those predicates together to create an expression for the complete predicate....