代码中有一个返回IEnumerable<string>的方法,用来模拟数据的产生,其中用到了一个yield关键字,我简单来说yield return就是部分返回(产生了一个数据,就返回一个,yield具体用法请看我上一篇分享的文章:[C#.NET 拾遗补漏] 理解 yield 关键字),这个方法最终的运行效果就是一秒钟返回一个当前时间构成一个IEnumerable<strin...
static void Main(string[] args) { List<string> list = new List<string>() { "aaaab", "caabb", "abcde", "uvwxyz", "qwertyuiop" }; IEnumerable<string> result1 = list.Where(s => s.Contains("x")); var result2 = list.Where(s => s.Contains("x")).ToList(); list[0] = "...
参数 columns 类型:System.Collections.Generic.IEnumerable<String> 要为之生成代码的列。 writer 类型:System.Data.Entity.Migrations.Utilities.IndentedTextWriter 生成的代码要添加到的文本编写器。 请参阅 参考 CSharpMigrationCodeGenerator 类 Generate 重载 System.Data.Entity.Migrations.Design 命名空间中文...
///偷懒的函数publicstaticIAsyncEnumerable<TTableRow>ParseSimpleTable<TTableRow>(stringhtml,stringtableSelector,stringrowSelector, Func<IElement, ValueTask<TTableRow>> rowParseFunc){// 出于直觉 在这里 usingusingMemoryStream stream =newMemoryStream(Encoding.UTF8.GetBytes(html));returnParseSimpleTable(...
Concat Method (IEnumerable(String)) Concat Method (String[]) Concat Method (Object, Object) Concat Method (String, String) Concat Method (Object, Object, Object) Concat Method (String, String, String) Concat Method (String, String, String, String) Contains Method Copy Method CopyTo Met...
一、接口IEnumerable实现 1、建一个学生数据结构和一个学生集合类: //student数据结构 class Student { public int id; public string name; } //student 集合 class StudentCollection { public List<Student> students = new List<Student>(); public void Add(Student student) { students.Add(student); } ...
Join(String, IEnumerable<String>) is a convenience method that lets you concatenate each element in an IEnumerable(Of String) collection without first converting the elements to a string array. It is particularly useful with Language-Integrated Query (LINQ) query expressions. The foll...
staticvoid Main(string[] args) { Console.WriteLine("***Fun with IEnumberable/IEnumerator***\n"); Garage carLot =new Garage(); //交出集合中的每一Car对象吗 foreach (Car cin carLot) { Console.WriteLine("{0} is going {1} MPH", c.CarName, c.CurrentSpeed); } Console.ReadLine(); ...
staticvoid Main(string[] args) { //创建数据库访问网关 using (SchoolDBEntities schoolEntities =new SchoolDBEntities()) { //查询的结果放入IQueryable接口的集合中 IQueryable<T_Class> classesIQue = (from c in schoolEntities.T_Class orderby ...
(true); IEnumerable<String> stringsFound;// Open a file with the StreamReaderEnumerable and check for a string.try{ stringsFound =fromlineinnewStreamReaderEnumerable(@"c:\temp\tempFile.txt")whereline.Contains("string to search for")selectline; Console.WriteLine("Found: "+ stringsFound.Count(...