в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:15:47Z

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==Convert an ArrayList into an array==

<source lang="csharp">using System;
using System.Collections;

class MainClass {
public static void Main() {
ArrayList al = new ArrayList();

// Add elements to the array list.
al.Add(1);
al.Add(2);
al.Add(3);
al.Add(4);

Console.Write("Contents: ");
foreach(int i in al)
Console.Write(i + " ");
Console.WriteLine();

// Get the array.
int[] ia = (int[]) al.ToArray(typeof(int));
int sum = 0;

// sum the array
for(int i=0; i<ia.Length; i++)
sum += ia[i];

Console.WriteLine("Sum is: " + sum);
}
}</source>
<pre class=codeResult>Contents: 1 2 3 4
Sum is: 10</pre>

==Convert user-defined objects in an ArrayList to an array==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Specialized;
class MyClass{
public string MyName="";
}
class MainClass
{
static void Main(string[] args)
{
ArrayList classList = new ArrayList();
classList.AddRange(new MyClass[] { new MyClass(),
new MyClass(),
new MyClass()});
Console.WriteLine("Items in List: {0}", classList.Count);
// Get object array from ArrayList & print again.
object[] arrayOfMyClasss = classList.ToArray();
for(int i = 0; i < arrayOfMyClasss.Length; i++)
{
Console.WriteLine("MyClass name: {0}",
((MyClass)arrayOfMyClasss[i]).MyName);
}
}
}</source>
<pre class=codeResult>Items in List: 3
MyClass name:
MyClass name:
MyClass name:</pre>

==Use ArrayList.ToArray to create a strongly typed string array from the contents of the collection==

<source lang="csharp">using System;
using System.Collections;
class MainClass
{
public static void Main(string[] args)
{
// Create a new ArrayList and populate it.
ArrayList list = new ArrayList(5);
list.Add("B");
list.Add("G");
list.Add("J");
list.Add("S");
list.Add("M");
string[] array3 = (string[])list.ToArray(typeof(String));
Console.WriteLine("Array 3:");
foreach (string s in array3)
{
Console.WriteLine("\t{0}", s);
}
}
}</source>
<pre class=codeResult>Array 3:
B
G
J
S
M</pre>

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в 15:31, 26 мая 2010

Admin: 1 версия