frmarrrylistexample.cs

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace ArrayListExample
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class frmArrarListExample : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnAdd;
		private System.Windows.Forms.TextBox txtPersonName;
		private System.Windows.Forms.ListBox lstMessage;
		private System.Windows.Forms.Button btnSearch;
		private System.Windows.Forms.TextBox txtSearchString;

		private ArrayList _arrPerson = new ArrayList();
		
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmArrarListExample()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.btnAdd = new System.Windows.Forms.Button();
			this.txtPersonName = new System.Windows.Forms.TextBox();
			this.lstMessage = new System.Windows.Forms.ListBox();
			this.btnSearch = new System.Windows.Forms.Button();
			this.txtSearchString = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// btnAdd
			// 
			this.btnAdd.Font = new System.Drawing.Font("Tahoma", 8F);
			this.btnAdd.Location = new System.Drawing.Point(168, 16);
			this.btnAdd.Name = "btnAdd";
			this.btnAdd.Size = new System.Drawing.Size(100, 21);
			this.btnAdd.TabIndex = 0;
			this.btnAdd.Text = "增加姓名(&A)";
			this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			// 
			// txtPersonName
			// 
			this.txtPersonName.Location = new System.Drawing.Point(8, 16);
			this.txtPersonName.Name = "txtPersonName";
			this.txtPersonName.Size = new System.Drawing.Size(160, 21);
			this.txtPersonName.TabIndex = 1;
			this.txtPersonName.Text = "";
			// 
			// lstMessage
			// 
			this.lstMessage.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.lstMessage.ItemHeight = 12;
			this.lstMessage.Location = new System.Drawing.Point(8, 40);
			this.lstMessage.Name = "lstMessage";
			this.lstMessage.Size = new System.Drawing.Size(456, 220);
			this.lstMessage.TabIndex = 2;
			// 
			// btnSearch
			// 
			this.btnSearch.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
			this.btnSearch.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnSearch.Location = new System.Drawing.Point(368, 264);
			this.btnSearch.Name = "btnSearch";
			this.btnSearch.Size = new System.Drawing.Size(96, 21);
			this.btnSearch.TabIndex = 3;
			this.btnSearch.Text = "查找元素(&S)";
			this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
			// 
			// txtSearchString
			// 
			this.txtSearchString.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
			this.txtSearchString.Location = new System.Drawing.Point(208, 264);
			this.txtSearchString.Name = "txtSearchString";
			this.txtSearchString.Size = new System.Drawing.Size(160, 21);
			this.txtSearchString.TabIndex = 4;
			this.txtSearchString.Text = "";
			// 
			// frmArrarListExample
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(472, 301);
			this.Controls.Add(this.txtSearchString);
			this.Controls.Add(this.btnSearch);
			this.Controls.Add(this.lstMessage);
			this.Controls.Add(this.txtPersonName);
			this.Controls.Add(this.btnAdd);
			this.Name = "frmArrarListExample";
			this.Text = "数组演示";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new frmArrarListExample());
		}

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
			_arrPerson.Add(this.txtPersonName.Text);
			lstMessage.Items.Clear();
			lstMessage.Items.Add("数组的容量是：" + this._arrPerson.Capacity.ToString());
			lstMessage.Items.Add("数组的元素个数是：" + this._arrPerson.Count.ToString());
			lstMessage.Items.Add("----------------------------------------------------------------");
			foreach(string personName in _arrPerson)
			{
				lstMessage.Items.Add("元素：" + personName);
			}
			lstMessage.Items.Add("----------------------------------------------------------------");
			_arrPerson.TrimToSize();
			lstMessage.Items.Add("整理后的数组容量是：" + _arrPerson.Capacity.ToString());
		}

		private void btnSearch_Click(object sender, System.EventArgs e)
		{
			if(_arrPerson.Contains(txtSearchString.Text))
			{
				MessageBox.Show("存在这个元素。");
			}
			else
			{
				MessageBox.Show("不存在这个元素。");
			}
		}
	}
}