泛型学习



using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;

namespace test1
{
    [Serializable]
    public class ItemInfo
    {

        // Internal member variables
        private string id;
        private string name;
     

        public ItemInfo() { }

     
        public ItemInfo(string id, string name)
        {
            this.id = id;
            this.name = name;
            
        }


        public string  Id
        {
            get { return  id; }
        }
        public string Name
        {
        get {return name;}
        }
    

    }
}

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="test1._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>
      
        <asp:Repeater ID="Repeater1" runat="server">
        <ItemTemplate>
        <table>
         <tr>
          
          <td><%#Eval("name") %></td>
         </tr>
        </table>
        </ItemTemplate>
        </asp:Repeater>
      
    </div>
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
    </form>
</body>
</html>

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.Collections.Generic;
namespace test1
{
    public partial class _Default : System.Web.UI.Page
    {    
    
    
  static  protected  Dictionary<string,ItemInfo> items=new Dictionary<string,ItemInfo>();
                     
                     
                     public  void Load_data()
                     {            
                     for (int i=0;i<5;i++)
                     {
                        ItemInfo item=new ItemInfo (i.ToString (),"name"+i.ToString ());
                        items.Add (item.Id,item);
                        }
                       
                     }
                     public void Bind_Data()
                      {
                          this.Repeater1.DataSource = items.Values;
                          this.Repeater1.DataBind();
                      }
                     
                   
                      
        protected void Page_Load(object sender, EventArgs e)
        {                
        
                      if (!this.IsPostBack)
                      {
                      this.Load_data();
                      this.Bind_Data ();
                        
                     
     
        }

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
        items .Remove ("3");
        Bind_Data();
        }

     
    
    }
}


using System;
using System.Collections.Generic;
using System.Collections;
namespace test1
{
   public class Stack<T> : IEnumerable<T>
    {
        private T[] values = new T[100];
        private int top = 0;

        public void Push(T t) { values[top++] = t; }
        public T Pop() { return values[--top]; }

        // These make Stack<T> implement IEnumerable<T> allowing
        // a stack to be used in a foreach statement.
        public IEnumerator<T> GetEnumerator()
        {
            for (int i = top; --i >= 0; )
            {
                yield return values[i];
            }
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }

        // Iterate from top to bottom.
        public IEnumerable<T> TopToBottom
        {
            get
            {
                // Since we implement IEnumerable<T>
                // and the default iteration is top to bottom,
                // just return the object.
                return this;
            }
        }

        // Iterate from bottom to top.
        public IEnumerable<T> BottomToTop
        {
            get
            {
                for (int i = 0; i < top; i++)
                {
                    yield return values[i];
                }
            }
        }

        //A parameterized iterator that return n items from the top
        public IEnumerable<T> TopN(int n)
        {
            // in this example we return less than N if necessary 
            int j = n >= top ? 0 : top - n;

            for (int i = top; --i >= j; )
            {
                yield return values[i];
            }
        }
    }
    }


using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;

namespace test1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Stack<ItemInfo> s = new Stack<ItemInfo>();
            for (int i = 0; i < 10; i++)
            {
                ItemInfo item = new ItemInfo(i.ToString(), "gw" + i.ToString());
                s.Push(item);
            }
          
            
          this.GridView1 .DataSource=s;
          this.GridView1 .DataBind ();

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Stack<ItemInfo> s = new Stack<ItemInfo>();
            for (int i = 0; i < 10; i++)
            {
                ItemInfo item = new ItemInfo(i.ToString(), "gw" + i.ToString());
                s.Push(item);
            }

            this.GridView1.DataSource =
         s.BottomToTop;
            this.GridView1.DataBind();

        }
    }
}



<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test1.WebForm1" %>

<!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>
    
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
    
    </div>
    <p>
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
    </p>
    </form>
</body>
</html>





posted on 2007-08-13 13:33  gwazy  阅读(291)  评论(0)  编辑  收藏  举报

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