в 15:31, 26 мая 2010

2010-05-26T15:31:18Z

Admin: 1 версия

2010-05-26T11:38:48Z

1 версия

Новая страница

==Add Extension method==

<source lang="csharp">
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Reflection;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
public static class Extensions {
public static string SpaceToUnderscore(this string source) {
char[] cArray = source.ToCharArray();
string result = null;
foreach (char c in cArray) {
if (Char.IsWhiteSpace(c))
result += "_";
else
result += c;
}
return result;
}
}
class Program {
static void Main(string[] args) {
string s = "This is a test";
Console.WriteLine(s.SpaceToUnderscore());
}
}
</source>

==Extension method for integer==

<source lang="csharp">

using System;
static class MainClass {
public static int ConvertToBase(this int i, int baseToConvertTo) {
if (baseToConvertTo < 2 || baseToConvertTo > 10)
throw new ArgumentException("Value cannot be converted to base " + baseToConvertTo.ToString());
int result = 0;
int iterations = 0;
do {
int nextDigit = i % baseToConvertTo;
result += nextDigit * (int)Math.Pow(10, iterations);
iterations++;
i /= baseToConvertTo;
}
while (i != 0);
return result;
}
static void Main() {
try {
int x = 591;
for (int i = 2; i <= 10; i++) {
Console.WriteLine("{0} in base {1} is {2}", x, i, x.ConvertToBase(i));
}
} catch (Exception ex) {
Console.WriteLine("Exception: {0}", ex.Message);
}
}
}
</source>

==Extension Methods Discoverability==

<source lang="csharp">
using System;
class Class1 {
}
class Class2 {
public void Method1(string s) {
Console.WriteLine("Class2.Method1");
}
}
class Class3 {
public void Method1(object o) {
Console.WriteLine("Class3.Method1");
}
}
class Class4 {
public void Method1(int i) {
Console.WriteLine("Class4.Method1");
}
}
static class Extensions {
static public void Method1(this object o, int i) {
Console.WriteLine("Extensions.Method1");
}
static void Main() {
new Class1().Method1(12); // Extensions.Method1 is called
new Class2().Method1(12); // Extensions.Method1 is called
new Class3().Method1(12); // Class3.Method1 is called
new Class4().Method1(12); // Class4.Method1 is called
}
}
</source>

==Object Initializer==

<source lang="csharp">
using System;
using System.Collections.Generic;
using System.Diagnostics;
class MyPC {
public Int32 Id { get; set; }
public Int64 Memory { get; set; }
public String Name { get; set; }
}
public class MainClass {
static void Main(string[] args) {
var processes = new List<MyPC>();
foreach (var process in Process.GetProcesses()) {
processes.Add(new MyPC {
Id = process.Id,
Name = process.ProcessName,
Memory = process.WorkingSet64
});
}
}
}
</source>

← Предыдущая	Версия 15:31, 26 мая 2010
(нет различий)

Csharp/C Sharp/LINQ/Extension Method - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия