form1.cs

150个经典的入门学习程序源代码

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

namespace Example131_优化只读数据的访问
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.ListView listView1;
		private System.Data.OleDb.OleDbConnection oleDbConnection1;
		private System.Data.OleDb.OleDbCommand oleDbCommand1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// 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 Form Designer generated code
		/// <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.listView1 = new System.Windows.Forms.ListView();
			this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
			this.oleDbCommand1 = new System.Data.OleDb.OleDbCommand();
			this.SuspendLayout();
			// 
			// listView1
			// 
			this.listView1.Location = new System.Drawing.Point(8, 8);
			this.listView1.Name = "listView1";
			this.listView1.Size = new System.Drawing.Size(280, 256);
			this.listView1.TabIndex = 0;
			// 
			// oleDbConnection1
			// 
			this.oleDbConnection1.ConnectionString = @"Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=pubs;Data Source=yinlimin;Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=YINLIMIN;Use Encryption for Data=False;Tag with column collation when possible=False";
			// 
			// oleDbCommand1
			// 
			this.oleDbCommand1.CommandText = "SELECT au_id, au_lname, au_fname, city, state FROM authors";
			this.oleDbCommand1.Connection = this.oleDbConnection1;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.listView1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			this.oleDbConnection1.Open();
			System.Data.OleDb.OleDbDataReader Reader; 
			Reader = oleDbCommand1.ExecuteReader();
		 
			this.listView1.View=View.Details;
			for(int i=0;i<Reader.FieldCount;i++)
			{
				this.listView1.Columns.Add(Reader.GetName(i),100,HorizontalAlignment.Left); 
			}

			while (Reader.Read())
			{
				ListViewItem tempItem=new ListViewItem();
				tempItem.Text=Reader.GetString(0);
				tempItem.SubItems.Add(Reader.GetString(1));
				tempItem.SubItems.Add(Reader.GetString(2));
				tempItem.SubItems.Add(Reader.GetString(3));
				tempItem.SubItems.Add(Reader.GetString(4));
				this.listView1.Items.Add(tempItem);
			}

		}
	}
}