C# ArrayList如何动态添加对象及取值

C# ArrayList如何动态添加对象及取值

1 添加用add函数，
2 取值根据索引。用中括号例如 myAL[2],
using System;
using System.Collections;
public class SamplesArrayList {

public static void Main() {

// Creates and initializes a new ArrayList.
ArrayList myAL = new ArrayList();
myAL.Add("Hello");
myAL.Add("World");
myAL.Add("!");

// Displays the properties and values of the ArrayList.
Console.WriteLine( "myAL" );
Console.WriteLine( " Count: {0}", myAL.Count );
Console.WriteLine( " Capacity: {0}", myAL.Capacity );
Console.Write( " Values:" );
PrintValues( myAL );
}

public static void PrintValues( IEnumerable myList ) {
foreach ( Object obj in myList )
Console.Write( " {0}", obj );
Console.WriteLine();
}

}

先建一个类,类中有两个变量作为坐标值 public class remtbpoint //remtbpoint 类(用来记忆某对象坐标){ private inprivate int rpointcol; public int RPointline{ get{return rpointline;} set { rpointline = value; }} public int RPointcol{get{ return rpointcol; } set { rpointcol = value; }}}private void rempoint(int line,int col)//记忆子程序,实例化后,赋值,加到arrayList中{r1 =new ；；； r1.RPointLine=line; r1.RPointcol=col; rembtpointLinst.Add(r1);} private void button1_Click(object sender,EventArgs e)//从记忆的arrayList中取出值,并动态删除最后一个arrayList元素{ int x=rembtpointLinst.Count;//直接取最末元素 if(x=1) {remtbpoint r3 =rembtpointLinst[x-1]asremtbpoint;//-------对于取数组列表中某元素太难,用这个方法极好用 //do...(r3.RPointLine, r3.RPointcol);这里就可以把arrayList元素对应的坐标值传给其它子程序使用了.

sb.add(name,courseid,value) 没有这个写法吧?arraylist类没有三个参数的add方法. sb.add(new string[]{name,courseid,value})才对吧? sb.add(new course (name,courseid,value)) 是往arraylist里加入一个course 的对象