Web,c#,linq,list,if-statement,foreach,C#,Linq,List,If Statement,Foreach,是否可以在LINQForEach调用中添加if-语句 sequence.Where(x => x.Name.ToString().Equals("Apple")) .ToList() .ForEach( /* If statement here */ ); 是的,它需要一个lambda表达式,因此您可以将任何有效的c#表达式放入其中您可以执行以下 ... WebJul 27, 2024 · So I want to use foreach loop, each item times 2. The other option is to use lambda expression. C#. return list. (x=>x*2); Which way is better? What I have tried: I …
How To Use Multiple Where Condition In LINQ - C# Corner
WebSep 15, 2024 · A where clause may contain one or more methods that return Boolean values. In the following example, the where clause uses a method to determine whether the current value of the range variable is even or odd. C#. class WhereSample3 { static void Main() { // Data source int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; // Create the query … WebWhere. The Where operator (Linq extension method) filters the collection based on a given criteria expression and returns a new collection. The criteria can be specified as lambda expression or Func delegate type. The Where extension method has following two overloads. Both overload methods accepts a Func delegate type parameter. frcc3030sb
C# SQL数据库中大量记录的Linq查询和Foreach_C#_Entity …
WebDec 7, 2015 · @DavidPacker: That's exactly what it does; most LINQ to Objects methods are implemented using iterator blocks. The example code above will iterate through the … WebMay 9, 2024 · Now we see how we can perform various queries against our data table on the list using a one-line query using a simple Lambda expression. A DataTable object has a built-in select method that has the following signature: DataRow [] DataTable.Select (string filterExpression, string sort) Where the input parameters are: WebHere's an example of how to use a where clause with a foreach loop: csharp foreach (var item in collection.Where(x => x.Property == value)) { // Do something with item } In this example, we're using the Where extension method on the collection object to filter the items based on a condition. frc button board