Method syntax, on the other hand, exposes the full gamut of query operators and is more concise with simple queries. You can get the best of both worlds by mixing query and method syntax. This is often done in LINQ to SQL queries:1...
LINQ Method Syntax //string collectionIList<string> stringList =newList<string>() {"C# Tutorials","VB.NET Tutorials","Learn C++","MVC Tutorials","Java"};//LINQ Query Syntaxvarresult = stringList.Where(s => s.Contains("Tutorials")); //Student collectionIList<Student> studentList =newList...
下列範例顯示簡單的「查詢運算式」(Query Expression),以及在語意上相等,以「方法架構查詢」(Method-Based Query) 撰寫的對等查詢。 C# 複製 class QueryVMethodSyntax { static void Main() { int[] numbers = { 5, 10, 8, 3, 6, 12}; //Query syntax: IEnumerable<int> numQuery1 = from num in...
Query vs. Method Syntax in LINQ There are two different types of syntax that you can use to query with LINQ: query syntax and method syntax. In the code samples both types are used, as one becomes familiar with with writing queries one style lends itself better than the other. G...
LINQ by specialized syntax in C# LINQ query in C# by method syntax, using the lambda operator > LINQ query execution This article discusses the LINQ provider.LINQ (Language Integrated Query) is a set of classes and methods that enable you to access data that is stored in a variety of ...
// 3. Query execution. foreach (int num in numQuery) { Console.Write("{0,1} ", num); } } } 下图演示完整的查询操作。 在 LINQ 中,查询的执行不同于查询本身。 换句话说,仅通过创建查询变量不会检索到任何数据。 using System; using System.Collections.Generic; ...
This series of examples shows you Language Integrated Query (LINQ) techniques to use with collections and arrays.
Language-Integrated Query (LINQ) adds query capabilities to Visual Basic and provides simple and powerful capabilities when you work with all kinds of data. Rather than sending a query to a database to be processed, or working with different query syntax for each type of data that you are ...
be expressed by using method syntax. The following code calculates the total score for each Student in the source sequence, and then calls theAverage()method on the results of that query to calculate the average score of the class. Note the placement of parentheses around the query expression...
LINQ Query Syntax LINQ Method Syntax LINQ Extension methods Lambda expressions First() and FirstOrDefault() Where() Sorting OrderBy() ThenBy() OrderByDescending() Reverse() Sorting with null values Creating Range() Repeat() Comparing and Combining ...