Enumerable in C#——内迭代与外迭代示例 昨晚家里上不了网,打开以前下的视频:what's new in csharp 3.0?.感叹于VS开发环境的中Code Snippet,以及 CSharp3.0 对迭代的支持。 随手仿照视频写了一个代码,用来演示CSharp3.0对迭代的支持。 1 usingSystem; 2 usingSystem.Collections.Generic; 3 usingSystem.Linq;...
[csharp] view plaincopy using System;using System.Data;class Program { public void DisplayProducts(DataTable table) { var productNames = from products in table.AsEnumerable() select products.Field<string>("ProductName");Console.WriteLine("Product Names: ");foreach (string productName...
Average values from Enumerable.Range in CSharp Description The following code shows how to average values from Enumerable.Range. Example usingSystem;/*fromwww.java2s.com*/usingSystem.Linq;usingSystem.Collections;usingSystem.Collections.Generic;publicclassMainClass {publicstaticvoidMain() { IEnumerable<...
Microsoft.CSharp.RuntimeBinder Namespace Microsoft.Internal Namespace Microsoft.Internal.Pivot.Controls Namespace Microsoft.Internal.Pivot.Interactivity Namespace Microsoft.Internal.Pivot.Utilities Namespace Microsoft.Internal.Pivot.Views Namespace Microsoft.Phone.Data.Linq Namespace ...
Key) ' Iterate through each value in the IGrouping and print its value. For Each str As String In packageGroup output.AppendLine(" " & str) Next Next ' Select a group of packages by indexing directly into the Lookup. Dim cgroup As IEnumerable(Of String) = lookup("C"c) output....
The set difference of two sets is defined as the members of the first set that do not appear in the second set. Note: This method returns those elements in first that do not appear in second. It does not also return those elements in second that do not appear in first. ...
IEnumerable<MyProduct> noduplicates = products.Distinct(); foreach (var product in noduplicates) Console.WriteLine(product.Name + " " + product.Code); /* This code produces the following output: apple 9 orange 4 lemon 12 */ 注解 此方法通过使用延迟执行来实现。 即时返回值是一个对象,用于存...
通过使用默认的相等比较器对值进行比较,返回并行序列中的非重复元素。 C# 复制 public static System.Linq.ParallelQuery<TSource> Distinct<TSource> (this System.Linq.ParallelQuery<TSource> source); 类型参数 TSource source 的元素类型。 参数 source ParallelQuery<TSource> 要从中移除重复元...
C# / CSharp Tutorial Data Structure yield using System; using System.Collections.Generic; class LetterCollection { string[] letters ={ "A", "B", "C"}; public IEnumerable<string> Forward() { for (int i = 0; i < letters.Length; i++) yield return letters[i];...
CSharp.RuntimeBinder Namespace Microsoft.Internal Namespace Microsoft.Internal.Pivot.Controls Namespace Microsoft.Internal.Pivot.Interactivity Namespace Microsoft.Internal.Pivot.Utilities Namespace Microsoft.Internal.Pivot.Views Namespace Microsoft.Phone.Data.Linq Namespace Microsoft.Phone.Data.Linq.Mapping ...