C# ArrayList（开发者如何使用）

class Program
{
// public static void main
    public static void Main()
    {
        ArrayList myArrayList = new ArrayList();
        myArrayList.Add("Hello");
        myArrayList.Add(100);
        var item = "World";
        myArrayList.Add(item);
        foreach (var obj in myArrayList)
        {
            Console.WriteLine(obj);
        }
    }
}

Friend Class Program
' public static void main
	Public Shared Sub Main()
		Dim myArrayList As New ArrayList()
		myArrayList.Add("Hello")
		myArrayList.Add(100)
		Dim item = "World"
		myArrayList.Add(item)
		For Each obj In myArrayList
			Console.WriteLine(obj)
		Next obj
	End Sub
End Class

myArrayList.Insert(1, "Inserted Item");

myArrayList.Insert(1, "Inserted Item")

myArrayList.Remove("Hello"); // Removes the first occurrence of "Hello"
myArrayList.RemoveAt(0); // Removes the element at index 0

myArrayList.Remove("Hello") ' Removes the first occurrence of "Hello"
myArrayList.RemoveAt(0) ' Removes the element at index 0

using System;
using System.Collections;
using System.Linq;
class AdvancedArrayListExample
{
    static void Main(string [] args)
    {
        // Initialize an ArrayList with some elements
        ArrayList numbers = new ArrayList() { 5, 8, 1, 3, 2 };
        // Adding elements
        numbers.Add(6); // Add an element to the end
        numbers.AddRange(new int [] { 7, 9, 0 }); // Add multiple elements from a specified collection.
        Console.WriteLine("Initial ArrayList:");
        foreach (int number in numbers)
        {
            Console.Write(number + " ");
        }
        Console.WriteLine("\n");
        // Removing elements
        numbers.Remove(1); // Remove the element 1
        numbers.RemoveAt(0); // Remove the first element
        Console.WriteLine("After Removal:");
        foreach (int number in numbers)
        {
            Console.Write(number + " ");
        }
        Console.WriteLine("\n");
        // Sorting
        numbers.Sort(); // Sort the ArrayList
        Console.WriteLine("Sorted ArrayList:");
        foreach (int number in numbers)
        {
            Console.Write(number + " ");
        }
        Console.WriteLine("\n");
        // Searching
        int searchFor = 5;
        int index = numbers.IndexOf(searchFor); // Find the index of the element
        if (index != -1)
        {
            Console.WriteLine($"Element {searchFor} found at index {index}");
        }
        else
        {
            Console.WriteLine($"Element {searchFor} not found.");
        }
        Console.WriteLine("\n");
        // Converting ArrayList to Array
        int [] numbersArray = (int [])numbers.ToArray(typeof(int));
        Console.WriteLine("Converted Array:");
        foreach (int number in numbersArray)
        {
            Console.Write(number + " ");
        }
        Console.WriteLine("\n");
        // Demonstrate LINQ with ArrayList (Requires System.Linq)
        var evenNumbers = numbers.Cast<int>().Where(n => n % 2 == 0).ToList(); // Assign values to evenNumbers from the filtered results.
        Console.WriteLine("Even Numbers:");
        evenNumbers.ForEach(n => Console.Write(n + " "));
        Console.WriteLine();
    }
}

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Linq
Friend Class AdvancedArrayListExample
	Shared Sub Main(ByVal args() As String)
		' Initialize an ArrayList with some elements
		Dim numbers As New ArrayList() From { 5, 8, 1, 3, 2 }
		' Adding elements
		numbers.Add(6) ' Add an element to the end
		numbers.AddRange(New Integer () { 7, 9, 0 }) ' Add multiple elements from a specified collection.
		Console.WriteLine("Initial ArrayList:")
		For Each number As Integer In numbers
			Console.Write(number & " ")
		Next number
		Console.WriteLine(vbLf)
		' Removing elements
		numbers.Remove(1) ' Remove the element 1
		numbers.RemoveAt(0) ' Remove the first element
		Console.WriteLine("After Removal:")
		For Each number As Integer In numbers
			Console.Write(number & " ")
		Next number
		Console.WriteLine(vbLf)
		' Sorting
		numbers.Sort() ' Sort the ArrayList
		Console.WriteLine("Sorted ArrayList:")
		For Each number As Integer In numbers
			Console.Write(number & " ")
		Next number
		Console.WriteLine(vbLf)
		' Searching
		Dim searchFor As Integer = 5
		Dim index As Integer = numbers.IndexOf(searchFor) ' Find the index of the element
		If index <> -1 Then
			Console.WriteLine($"Element {searchFor} found at index {index}")
		Else
			Console.WriteLine($"Element {searchFor} not found.")
		End If
		Console.WriteLine(vbLf)
		' Converting ArrayList to Array
		Dim numbersArray() As Integer = DirectCast(numbers.ToArray(GetType(Integer)), Integer ())
		Console.WriteLine("Converted Array:")
		For Each number As Integer In numbersArray
			Console.Write(number & " ")
		Next number
		Console.WriteLine(vbLf)
		' Demonstrate LINQ with ArrayList (Requires System.Linq)
		Dim evenNumbers = numbers.Cast(Of Integer)().Where(Function(n) n Mod 2 = 0).ToList() ' Assign values to evenNumbers from the filtered results.
		Console.WriteLine("Even Numbers:")
		evenNumbers.ForEach(Sub(n) Console.Write(n & " "))
		Console.WriteLine()
	End Sub
End Class

using IronPdf;
using System;
using System.Collections;
class pdfocde
{
    static void Main(string [] args)
    {
        IronPdf.License.LicenseKey = "License";
        // Create a new ArrayList and add some items
        ArrayList itemList = new ArrayList();
        itemList.Add("Apple");
        itemList.Add("Banana");
        itemList.Add("Cherry");
        itemList.Add("Date");
        // Initialize a new PDF document
        var Renderer = new ChromePdfRenderer();
        // Create an HTML string to hold our content
        string htmlContent = "<h1>Items List</h1><ul>";
        // Iterate over each item in the ArrayList and add it to the HTML string
        foreach (var item in itemList)
        {
            htmlContent += $"<li>{item}</li>";
        }
        htmlContent += "</ul>";
        // Convert the HTML string to a PDF document
        var PDF = Renderer.RenderHtmlAsPdf(htmlContent);
        // Save the PDF to a file
        PDF.SaveAs("e:\\ItemList.pdf");
        Console.WriteLine("PDF file 'ItemList.pdf' has been generated.");
    }
}

Imports IronPdf
Imports System
Imports System.Collections
Friend Class pdfocde
	Shared Sub Main(ByVal args() As String)
		IronPdf.License.LicenseKey = "License"
		' Create a new ArrayList and add some items
		Dim itemList As New ArrayList()
		itemList.Add("Apple")
		itemList.Add("Banana")
		itemList.Add("Cherry")
		itemList.Add("Date")
		' Initialize a new PDF document
		Dim Renderer = New ChromePdfRenderer()
		' Create an HTML string to hold our content
		Dim htmlContent As String = "<h1>Items List</h1><ul>"
		' Iterate over each item in the ArrayList and add it to the HTML string
		For Each item In itemList
			htmlContent &= $"<li>{item}</li>"
		Next item
		htmlContent &= "</ul>"
		' Convert the HTML string to a PDF document
		Dim PDF = Renderer.RenderHtmlAsPdf(htmlContent)
		' Save the PDF to a file
		PDF.SaveAs("e:\ItemList.pdf")
		Console.WriteLine("PDF file 'ItemList.pdf' has been generated.")
	End Sub
End Class