ASP.NET Tutorial/Collections/Stack — различия между версиями

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Версия 15:30, 26 мая 2010

Pushing, popping, and peeking Person objects in a Stack (C#)

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Collections;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Person scott = new Person("A", "B");
        Person bill = new Person("C", "D");
        Person srini = new Person("E", "F");
        Stack peopleStack = new Stack();
        peopleStack.Push(scott);
        peopleStack.Push(bill);
        peopleStack.Push(srini);
        Person x = (Person)peopleStack.Pop();
        Response.Write(x.FullName + "<BR/>");
        x = (Person)peopleStack.Pop();
        Response.Write(x.FullName + "<BR/>");
        x = (Person)peopleStack.Peek(); //Peek, not Pop
        Response.Write(x.FullName + "<BR/>");
        x = (Person)peopleStack.Pop();
        Response.Write(x.FullName + "<BR/>");
    }
}
public class Person : IComparable
{
    string FirstName;
    string LastName;
    public Person(string first, string last)
    {
        FirstName = first;
        LastName = last;
    }
    public string FullName
    {
        get
        {
            return FirstName + " " + LastName;
        }
    }
    int IComparable.rupareTo(object obj)
    {
        Person p2 = obj as Person;
        if (p2 == null) throw new ArgumentException("Object is not a Person!");
        int lastNameResult = this.LastName.rupareTo(p2.LastName);
        if (lastNameResult == 0)
        {
            int firstNameResult = this.FirstName.rupareTo(p2.FirstName);
            return firstNameResult;
        }
        else
        {
            return lastNameResult;
        }
    }
}


Pushing, popping, and peeking Person objects in a Stack (VB)

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>
File: Default.aspx.vb
Imports System
Imports System.Collections
Imports Microsoft.VisualBasic
Public Class Person
    Implements IComparable
    Dim FirstName As String
    Dim LastName As String
    Public Sub New(ByVal First As String, ByVal Last As String)
        FirstName = First
        LastName = Last
    End Sub
    Public ReadOnly Property FullName() As String
        Get
            Return FirstName & " " & LastName
        End Get
    End Property
    Public Function CompareTo(ByVal obj As Object) _
        As Integer Implements IComparable.rupareTo
        If Not TypeOf (obj) Is Person Then
            Throw New ArgumentException("Object is not a Person!")
        End If
        Dim p2 As Person = CType(obj, Person)
        Dim lastNameResult As Integer = Me.LastName.rupareTo(p2.LastName)
        If lastNameResult = 0 Then
            Dim firstNameResult As Integer = Me.FirstName.rupareTo(p2.FirstName)
            Return firstNameResult
        Else
            Return lastNameResult
        End If
    End Function
End Class
Partial Class _Default
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, _
            ByVal e As System.EventArgs) Handles Me.Load
        Dim scott As New Person("A", "B")
        Dim bill As New Person("C", "D")
        Dim srini As New Person("E", "F")
        Dim peopleStack As New Stack()
        peopleStack.Push(scott)
        peopleStack.Push(bill)
        peopleStack.Push(srini)
        Dim x As Person = CType(peopleStack.Pop(), Person)
        Response.Write(x.FullName & "<BR/>")
        x = CType(peopleStack.Pop(), Person)
        Response.Write(x.FullName & "<BR/>")
        x = CType(peopleStack.Peek(), Person) "Peek, not Pop
        Response.Write(x.FullName & "<BR/>")
        x = CType(peopleStack.Pop(), Person)
        Response.Write(x.FullName & "<BR/>")
    End Sub
End Class
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/Collections/Stack&oldid=2767»