asp.net常见面试题（一）

1、索引器

1 class Player 2 { 3 private int[] arr = new int[100]; 4 public int this[int index] 5 { 6 get { 7 if (index < 10 || index >= 10) 8 { 9 return 0; 10 } 11 else 12 { 13 return arr[index]; 14 } 15 } 16 set { 17 if (!(index < 0 || index >= 100)) 18 { 19 arr[index] = value; 20 } 21 } 22 } 23 } View Code 1 class Program 2 { 3 static void Main(string[] args) 4 { 5 Player p = new Player(); 6 p[0] = 100; 7 p[1] = 101; 8 Console.WriteLine(p[0]); 9 Console.ReadKey(); 10 } 11 } View Code

2、应用程序域

把一个程序进程分为各个独立的小进程，各个小进程中相互隔离，互不影响。

demo1

1 class Player 2 { 3 private static int i; 4 public void SetValue(int a) 5 { 6 i = a; 7 } 8 public int GetValue() 9 { 10 return i; 11 } 12 } View Code 1 class Program 2 { 3 static void Main(string[] args) 4 { 5 Player p1 = new Player(); 6 p1.SetValue(5); 7 Player p2 = new Player(); 8 p2.SetValue(10); 9 Console.WriteLine(p1.GetValue()); 10 Console.WriteLine(p2.GetValue()); 11 Console.ReadKey(); 12 } 13 } View Code

demo2

1 public class Player:MarshalByRefObject 2 { 3 private static int i; 4 public void SetValue(int a) 5 { 6 i = a; 7 } 8 public int GetValue() 9 { 10 return i; 11 } 12 } View Code 1 private void Form1_Load(object sender, EventArgs e) 2 { 3 AppDomain appDomain1 = AppDomain.CreateDomain("domain1"); 4 Player play1 = (Player)appDomain1.CreateInstanceFromAndUnwrap("WindowsFormsApplication1.exe", "WindowsFormsApplication1.Player"); 5 play1.SetValue(5); 6 AppDomain appDomain2 = AppDomain.CreateDomain("domain2"); 7 Player play2 = (Player)appDomain2.CreateInstanceFromAndUnwrap("WindowsFormsApplication1.exe", "WindowsFormsApplication1.Player"); 8 play2.SetValue(100); 9 MessageBox.Show(play1.GetValue().ToString()); 10 MessageBox.Show(play2.GetValue().ToString()); 11 } View Code

3、CTS、CLS、CLR区别

cts:Comment Type System 通用系统类型，int32、int16--->int,String----->string,Boolean---->bool 不同语言变量类型不同，最后在.net上转换后都是同一种形式。

cls:Comment Language Specification 通用语言规范，不同语言语法不同，最后在.net上转换后都是同一种形式。

clr:Comment Language Runtime 公共语言运行时

 

 

转载于:https://www.cnblogs.com/ruanmou001/p/3753387.html

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