sample16.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.Drawing;
	using System.Collections;
	using System.ComponentModel;
	using System.Windows.Forms;
	using System.Data;
	using System.IO ;
		
	public class Form1 : System.Windows.Forms.Form
	{
		private CheckedListBox checkedListBox1;
		private TextBox textBox1;
		private Button button1;
		private Button button2;
		private ListBox listBox1;
		private Button button3;
		private System.ComponentModel.Container components;
		public Form1()
		{
			InitializeComponent();
			string[] animalType = {"Dog", "Cat","Tiger","Monkey"};
			checkedListBox1.Items.AddRange(animalType);
			checkedListBox1.CheckOnClick = true;
		}
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.textBox1 = new  System.Windows.Forms.TextBox();
			this.checkedListBox1 = new System.Windows.Forms.CheckedListBox();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.button3 = new System.Windows.Forms.Button();
			this.textBox1.Location = new Point(144, 16);
			this.textBox1.Size = new System.Drawing.Size(88, 22);
			this.textBox1.TabIndex = 1;

			this.textBox1.TextChanged+=new EventHandler(this.textBox1_TextChanged);
			this.checkedListBox1.Location = new System.Drawing.Point(16, 16);
			this.checkedListBox1.Size = new System.Drawing.Size(100, 160);
			this.checkedListBox1.TabIndex = 0;
			this.checkedListBox1.ItemCheck+=new ItemCheckEventHandler(this.checkedListBox1_ItemCheck);
			this.listBox1.Location=new System.Drawing.Point(255, 16);
			this.listBox1.Size = new System.Drawing.Size(100, 160);
			this.listBox1.TabIndex = 1;
			this.button1.Enabled = false;
			this.button1.Location = 
				new System.Drawing.Point(144, 40);
			this.button1.Size = new System.Drawing.Size(88, 22);
			this.button1.TabIndex = 2;
			this.button1.Text = "添加动物种类";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			this.button2.Enabled = false;
			this.button2.Location = 
				new System.Drawing.Point(144, 70);
			this.button2.Size = new System.Drawing.Size(88, 22);
			this.button2.TabIndex = 2;
			this.button2.Text = "排序";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			this.button3.Enabled = false;
			this.button3.Location = new System.Drawing.Point(144, 100);
			this.button3.Size = new System.Drawing.Size(88, 22);
			this.button3.TabIndex = 2;
			this.button3.Text = "保存该次序";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(400, 150);
			this.Controls.AddRange(new Control[] {this.listBox1, this.button3, this.button2,this.button1, this.textBox1, this.checkedListBox1});
			this.Text = "动物名称排列次序：";
		}
		[STAThread]
		public static void Main(string[] args) 
		{
			Application.Run(new Form1());
		}
		private void button1_Click(object sender, EventArgs e)
		{
			if(textBox1.Text != "")
			{

				if(checkedListBox1.CheckedItems.Contains(textBox1.Text)== false)
					checkedListBox1.Items.Add(textBox1.Text,CheckState.Checked);
				textBox1.Text = "";
			}
		}		
		private void textBox1_TextChanged(object sender,EventArgs e)
		{
			if (textBox1.Text == "")
			{
				button1.Enabled = false;
			}
			else
			{
				button1.Enabled = true;
			}            
		}
		private void button2_Click(object sender, System.EventArgs e)
		{
			listBox1.Items.Clear();
			button3.Enabled=false;
			for (int i=0; i< checkedListBox1.CheckedItems.Count;i++)
			{
				listBox1.Items.Add(checkedListBox1.CheckedItems[i]);
			}
			if (listBox1.Items.Count>0)
				button3.Enabled=true;         
		}
		private void checkedListBox1_ItemCheck (object sender,ItemCheckEventArgs e)
		{
			if(e.NewValue==CheckState.Unchecked)
			{
				if(checkedListBox1.CheckedItems.Count==1)
				{
					button2.Enabled = false;
				}
			}
			else
			{
				button2.Enabled = true;
			}
		}
		private void button3_Click(object sender, System.EventArgs e)
		{		
			listBox1.Items.Clear();
			IEnumerator myEnumerator;
			myEnumerator = 
				checkedListBox1.CheckedIndices.GetEnumerator();
			int y;
			while (myEnumerator.MoveNext() != false)
			{
				y =(int) myEnumerator.Current;
				checkedListBox1.SetItemChecked(y, false);
			}
			button3.Enabled = false ;
		}        
	}
}