C#中用有一段代码返回返回List<string> list = new List<string>();中50至100行的数据

C是编程语言中的一种基础语言，由贝尔实验室的Dennis Ritchie所创建。它的特点包括效率高、语法简洁、可移植性强等，因此在许多系统软件和嵌入式系统的开发中得到广泛应用。C语言也是许多其他编程语言的基础，如C++、Java等。

相关问题

你写一个图书管理系统系统，这个系统在vs中用c#语言写后端代码，在vsCode中用vue写前端代码

好的，下面是一个简单的图书管理系统的后端代码示例，使用C#语言编写，可以在Visual Studio中运行：

using System;
using System.Collections.Generic;

namespace BookManagementSystem
{
    class Program
    {
        static List<Book> bookList = new List<Book>();

        static void Main(string[] args)
        {
            Console.WriteLine("Welcome to the Book Management System!");

            while (true)
            {
                Console.WriteLine("1. Add a book");
                Console.WriteLine("2. Search for a book");
                Console.WriteLine("3. View all books");
                Console.WriteLine("4. Exit");

                int choice = int.Parse(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        AddBook();
                        break;
                    case 2:
                        SearchBook();
                        break;
                    case 3:
                        ViewAllBooks();
                        break;
                    case 4:
                        Environment.Exit(0);
                        break;
                    default:
                        Console.WriteLine("Invalid choice!");
                        break;
                }
            }
        }

        static void AddBook()
        {
            Console.WriteLine("Enter book title:");
            string title = Console.ReadLine();

            Console.WriteLine("Enter author name:");
            string author = Console.ReadLine();

            Console.WriteLine("Enter publication year:");
            int year = int.Parse(Console.ReadLine());

            Book book = new Book(title, author, year);
            bookList.Add(book);

            Console.WriteLine("Book added successfully!");
        }

        static void SearchBook()
        {
            Console.WriteLine("Enter book title:");
            string title = Console.ReadLine();

            foreach (Book book in bookList)
            {
                if (book.Title.Equals(title, StringComparison.OrdinalIgnoreCase))
                {
                    Console.WriteLine("Book found:");
                    Console.WriteLine(book);
                    return;
                }
            }

            Console.WriteLine("Book not found!");
        }

        static void ViewAllBooks()
        {
            foreach (Book book in bookList)
            {
                Console.WriteLine(book);
            }
        }
    }

    class Book
    {
        public string Title { get; set; }
        public string Author { get; set; }
        public int Year { get; set; }

        public Book(string title, string author, int year)
        {
            Title = title;
            Author = author;
            Year = year;
        }

        public override string ToString()
        {
            return Title + " by " + Author + " (" + Year + ")";
        }
    }
}

下面是一个简单的图书管理系统的前端代码示例，使用Vue.js编写，可以在VS Code中运行：

<template>
  <div>
    <h1>Book Management System</h1>
    <form @submit.prevent="addBook">
      <label for="title">Title:</label>
      <input type="text" id="title" v-model="newBook.title" required>
      <br>
      <label for="author">Author:</label>
      <input type="text" id="author" v-model="newBook.author" required>
      <br>
      <label for="year">Publication Year:</label>
      <input type="number" id="year" v-model.number="newBook.year" required>
      <br>
      <button>Add Book</button>
    </form>
    <hr>
    <h2>Search for a Book</h2>
    <form @submit.prevent="searchBook">
      <label for="searchTitle">Title:</label>
      <input type="text" id="searchTitle" v-model="searchTitle" required>
      <br>
      <button>Search</button>
    </form>
    <hr>
    <h2>All Books</h2>
    <ul>
      <li v-for="book in bookList">{{ book.title }} by {{ book.author }} ({{ book.year }})</li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      newBook: {
        title: "",
        author: "",
        year: 0
      },
      searchTitle: "",
      bookList: []
    };
  },
  methods: {
    addBook() {
      this.bookList.push({
        title: this.newBook.title,
        author: this.newBook.author,
        year: this.newBook.year
      });
      this.newBook.title = "";
      this.newBook.author = "";
      this.newBook.year = 0;
    },
    searchBook() {
      for (let i = 0; i < this.bookList.length; i++) {
        if (this.bookList[i].title.toLowerCase() === this.searchTitle.toLowerCase()) {
          alert(this.bookList[i].title + " by " + this.bookList[i].author + " (" + this.bookList[i].year + ")");
          return;
        }
      }
      alert("Book not found!");
    }
  }
};
</script>

c#.net在一个richtextbox中用listbox实现代码自动提示

可以通过以下步骤实现：

1. 在窗体中添加一个 RichTextBox 和一个 ListBox 控件。

2. 在 RichTextBox 的 TextChanged 事件中，获取当前光标所在行的文本，并根据该文本获取匹配的代码提示列表。

3. 将匹配的提示项添加到 ListBox 中，并显示在 RichTextBox 下方。

4. 监听 ListBox 的 SelectedIndexChanged 事件，当选中一个提示项时，将其插入到 RichTextBox 中。

以下是一个简单的示例代码：

private void richTextBox1_TextChanged(object sender, EventArgs e)
{
    // 获取当前光标所在行的文本
    int index = richTextBox1.SelectionStart;
    int line = richTextBox1.GetLineFromCharIndex(index);
    string text = richTextBox1.Lines[line];

    // 根据文本获取匹配的代码提示列表
    List<string> suggestions = GetSuggestions(text);

    // 清空 ListBox，并添加提示项
    listBox1.Items.Clear();
    listBox1.Items.AddRange(suggestions.ToArray());

    // 显示 ListBox
    if (suggestions.Count > 0)
    {
        listBox1.Visible = true;
        listBox1.Width = richTextBox1.Width;
        listBox1.Top = richTextBox1.Top + (line + 1) * richTextBox1.Font.Height;
        listBox1.Left = richTextBox1.Left;
    }
    else
    {
        listBox1.Visible = false;
    }
}

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    // 将选中的提示项插入到 RichTextBox 中
    int index = richTextBox1.SelectionStart;
    int line = richTextBox1.GetLineFromCharIndex(index);
    int start = richTextBox1.GetFirstCharIndexFromLine(line);
    int length = index - start;
    string suggestion = listBox1.SelectedItem.ToString();
    richTextBox1.SelectionStart = start;
    richTextBox1.SelectionLength = length;
    richTextBox1.SelectedText = suggestion;
    listBox1.Visible = false;
}

private List<string> GetSuggestions(string text)
{
    // 根据文本获取匹配的代码提示列表
    List<string> suggestions = new List<string>();
    if (text.StartsWith("using "))
    {
        suggestions.Add("System");
        suggestions.Add("System.Collections");
        suggestions.Add("System.IO");
        suggestions.Add("System.Linq");
        suggestions.Add("System.Text");
    }
    else if (text.StartsWith("Console."))
    {
        suggestions.Add("Write");
        suggestions.Add("WriteLine");
        suggestions.Add("Read");
        suggestions.Add("ReadLine");
    }
    return suggestions;
}

在 GetSuggestions 方法中，可以根据实际需求生成代码提示列表，例如从一个 XML 文件中读取提示项。