2.使用Distinct()方法 staticvoidDistinctExp() {//Using Method SyntaxvarMS =Student.GetAllStudents() .Distinct().ToList();//Using Query SyntaxvarQS = (fromstdinStudent.GetAllStudents()selectstd) .Distinct().ToList()
DistinctIEnumerable<T>✓ ElementAtTSource✓ ElementAtOrDefaultTSource?✓ EmptyIEnumerable<T>✓ ExceptIEnumerable<T>✓✓ FirstTSource✓ FirstOrDefaultTSource?✓ GroupByIEnumerable<T>✓ GroupJoinIEnumerable<T>✓✓ IntersectIEnumerable<T>✓✓ ...
};//LINQ Query Syntax to find out teenager studentsvarteenAgerStudent =fromsinstudentListwheres.Age >12&& s.Age <20selects; LINQ Method Syntax //string collectionIList<string> stringList =newList<string>() {"C# Tutorials","VB.NET Tutorials","Learn C++","MVC Tutorials","Java"};//LINQ Q...
IEnumerable<string> query = from planet in planets.Distinct() select planet; foreach (var str in query) { Console.WriteLine(str); } /* This code produces the following output: * * Mercury * Venus * Earth * Mars */ Except 以下示例演示 Enumerable.Except 的行为。 返回的序列只包含位于第一...
// Create the IEnumerable data sources.string[] names1 = File.ReadAllLines("names1.txt");string[] names2 = File.ReadAllLines("names2.txt");// Create the query. Note that method syntax must be used here.vardifferenceQuery = names1.Except(names2);// Execute the query.Console.Write...
將目前的運算式樹狀架構包裝在表示方法呼叫的 MethodCallExpression 中。 將包裝的運算式樹狀架構傳回給提供者,以透過提供者的 IQueryProvider.Execute 方法傳回值;或透過 IQueryProvider.CreateQuery 方法傳回轉譯的查詢物件。您可以用 System.Linq.IQueryable<T> 傳回方法的結果取代原始查詢,以取得新的查詢。 ...
The LINQ query examples in this section filter data in the feed returned by the service.The following examples are equivalent queries that filter the returned Orders entities so that only orders with a freight cost greater than $30 are returned:Using LINQ query syntax: ...
方法Distinct<TSource>(IQueryable<TSource>)生成一个 ,MethodCallExpression表示将调用Distinct<TSource>(IQueryable<TSource>)自身作为构造的泛型方法。 然后,MethodCallExpressionCreateQuery<TElement>(Expression)它将 传递给 由Provider参数的 属性表示的 的source方法IQueryProvider。
In Visual Basic query expression syntax, aDistinctclause translates to an invocation ofDistinct. The default equality comparer,Default, is used to compare values of the types that implement theIEquatable<T>generic interface. To compare a custom data type, you need to implement this interface and ...
I have LINQPad. I spent two hours trying to guess my way around this query with no success. I realy need a conversion tool, which can at least point me into the right direction as syntax is often not very intuitive. Can anyone help with either the conversion of this query or recommend...