C#中关于集合的一个小例子

　　这是一个在c#中使用集合的一个小小的例子，里面涉及到了　Hashtable，ArrayList，集合的排序，枚举器，集合的遍历，成员的查找。

　　例子如下：

Form1代码：

 


 public partial class Form1 : Form




    ...{


        public Form1()




        ...{


            InitializeComponent();


        }


        public string rInfo;


        public int rInfo2;




        private void button1_Click(object sender, EventArgs e)




        ...{


            


            Hashtable hTable = new Hashtable();


            int flag = 0;




            try




            ...{


                hTable.Add(5, new animal(5, "red bull"));


                hTable.Add(6, new animal(6, "blue lion"));


                hTable.Add(4, new animal(4, "green fly"));


                hTable.Add(2, new animal(2, "yellow dog"));


                hTable.Add(3, new animal(3, "white horse"));


                hTable.Add(1, new animal(1, "black pig"));


            }


            catch (Exception Ex)




            ...{


                MessageBox.Show (Ex.Message);


            }




            //用ArrayList对键进行排序


            ArrayList aList = new ArrayList(hTable.Keys);


            aList.Sort();




            //遍历器打印排序后的结果


            IDictionaryEnumerator iDicEnumerator = hTable.GetEnumerator();


            System.Text.StringBuilder sb=new System.Text.StringBuilder();


            while (iDicEnumerator.MoveNext())




            ...{


                animal oAnimal = (animal)hTable[iDicEnumerator.Key];


                sb.AppendLine (oAnimal.code + " " + oAnimal.name);


            }


            MessageBox.Show(sb.ToString());


            //查找动物名字


            Form2 oF2 = new Form2(this, "0");


            oF2.ShowDialog();


       


            foreach (int sCode in aList)




            ...{


                animal oAnimal = (animal)hTable[sCode];


                if (oAnimal.name == rInfo)




                ...{


                    MessageBox.Show("查找结果：代码为" + oAnimal.code );


                    flag = 1;


                    break;


                }


            }


            if (flag == 0)




            ...{


                MessageBox.Show("没有这个动物！");


            }




            //查找动物代码


            Form2 oF3= new Form2(this, "1");


            oF3.ShowDialog();


            if (hTable.ContainsKey(rInfo2))




            ...{


                animal s = (animal)hTable[rInfo2];


                MessageBox.Show("查找结果：动物名字为" + s.name);


            }


            else




            ...{


                MessageBox.Show("没有找到这样的动物！");


            }




        }




      


    }




    class animal




    ...{


        public int code;


        public string name;




        public animal(int Code, string Name)




        ...{


            this.code = Code;


            this.name = Name;


        }


    }

 

form2的代码：

 


 public partial class Form2 : Form




    ...{


        Form1 kk;


        string rFlag="";


        public Form2(Form1 k,string flag)




        ...{


            InitializeComponent();


            kk = k;


            rFlag = flag;


            if (rFlag == "1")




            ...{


                textBox1.ReadOnly = true;


                textBox1.Text = "1";


            }


        }




        private void button1_Click(object sender, EventArgs e)




        ...{


            if (this.textBox1.Text.Trim() != "")




            ...{


                if (rFlag == "0")




                ...{


                    kk.rInfo = this.textBox1.Text;


                }


                else




                ...{


                    kk.rInfo2 = Convert.ToInt32(this.textBox1.Text);


                }


                


                this.Close();


            }


        }




        private void textBox1_MouseDoubleClick(object sender, EventArgs e)




        ...{


            int liu = Convert.ToInt32(this.textBox1.Text) + 1;


            if(liu>6) 


                 this.textBox1.Text="1";


             this.textBox1.Text = liu.ToString();


        }






       


    }