Let me give you an example first:
Create a winform solution in vs2010, and then define a class Person. The code of Person.cs is as follows:
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace test { public class Person { public string Name { get; set; } public int Age { get; set; } public string six { get; set; } public DateTime Birthday { get; set; } } }
(move the mouse over the code, four will appear at the top of the code icon, the first one is to view the source code, the second one is to copy the code, the third one is to print the code, and the fourth one is help)
Then drag in a button, double-click the button, and add the code inside:
List<Person> list = new List<Person>(); Person person = null; for (int i = 0; i < 10; i++) { person = new Person(); person.Name = string.Format("xxxx{0}", i); person.Age = 20 + i; person.Birthday = DateTime.Now.AddDays(i); person.six = i % 2 == 0 ? "女" : "男"; list.Add(person); } string serialStr = JsonConvert.SerializeObject(list); List<Person> listperson = new List<Person>(); listperson = JsonConvert.DeserializeObject<List<Person>>(serialStr); for (int i = 0; i < listperson.Count; i++) { MessageBox.Show(listperson[i].Name); }
(Move the mouse over the code, and four icons will appear at the top of the code. The first is to view the source code, the second is to copy the code, the third is to print the code, and the fourth is help)
The above is A simple usage example of List
C# List
Namespace: using System.Collections.Generic;
List
Benefits of generics: It adds great power and flexibility to writing object-oriented programs using the C# language. There is no forced boxing and unboxing of value types, or downcasting of reference types, so performance is improved.
1. Basic and commonly used methods of List:
1. List
a.T is the element type in the list, now take the string type as an example
For example: List
b. Add element: List. Add(T item) Add an element
For example: mList.Add("Lai Yanbin") ;
c. Insert element: Insert(int index, T item); Add an element at index position
For example: mList.Insert(1, "laiyanbin");
d. Delete element : List. Remove (T ITEM) Delete a value. For example: mlist.remove ("Lai Yanbin");
List. Removeat (int index); .:mList.RemoveAt(0);
List. RemoveRange(int index, int count); Starting from the subscript index, delete count elements
use use use use use using ’ s through out ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ List.RemoveRange(int index, int count); / An error will occur if it exceeds the scope of deletion
Note: After an element is deleted, the subscript of the element behind it will automatically follow
e. Determine whether there is a List: List. Contains(T item) The result is to return true Or false
f. Sort: List. Sort () //The default is the first letter of the element in ascending order
Can Use with List.Sort () to achieve the desired effect
Traversing the elements in the List: Console.WriteLine( element);
Number of elements:
List. Count ( ) Return int value
i. Add array into List:string[] temArr = { Ha","Hunter", "Tom", "Lily", "Jay", "Jim", "Kuku", " "Locu" };
mList.AddRange(temArr);
E.g.: string[] temArr = { "Ha", "Hunter", "Tom", "Lily", "Jay", "Jim", "Kuku", "Locu" };
List
3. Mutual conversion between List and array
1. Convert from string[] to List
For example: string[] str={"1"," 2"};
List 2. From List For example: List String[] str=list.ToArray(); / /ViewState["idlist"] is converted into List List More lists in C# For articles related to usage examples, please pay attention to the PHP Chinese website!

This article explains how to create newline characters in C using the \n escape sequence within printf and puts functions. It details the functionality and provides code examples demonstrating its use for line breaks in output.

This article explores the challenges of NULL pointer dereferences in C. It argues that the problem isn't NULL itself, but its misuse. The article details best practices for preventing dereferences, including pre-dereference checks, pointer initiali

This article guides beginners on choosing a C compiler. It argues that GCC, due to its ease of use, wide availability, and extensive resources, is best for beginners. However, it also compares GCC, Clang, MSVC, and TCC, highlighting their differenc

This article emphasizes the continued importance of NULL in modern C programming. Despite advancements, NULL remains crucial for explicit pointer management, preventing segmentation faults by marking the absence of a valid memory address. Best prac

This article reviews online C compilers for beginners, focusing on ease of use and debugging capabilities. OnlineGDB and Repl.it are highlighted for their user-friendly interfaces and helpful debugging tools. Other options like Programiz and Compil

This article discusses efficient code copying in C IDEs. It emphasizes that copying is an IDE function, not a compiler feature, and details strategies for improved efficiency, including using IDE selection tools, code folding, search/replace, templa

This article compares online C programming platforms, highlighting differences in features like debugging tools, IDE functionality, standard compliance, and memory/execution limits. It argues that the "best" platform depends on user needs,

This tutorial guides users through installing C compilers on Windows, macOS, and Linux. It details installation for popular compilers (MinGW, Visual Studio, Xcode, GCC), explains environment variable configuration, and offers troubleshooting steps


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SublimeText3 Chinese version
Chinese version, very easy to use

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version
Visual web development tools
