form1.cs

c#精彩编程百例（源代码）

namespace WindowsApp_openFile
{
    using System;
	using System.IO;
    using System.Drawing;
    using System.Collections;
    using System.ComponentModel;
    using System.WinForms;
    using System.Data;

    /// <summary>
    ///    Summary description for Form1.
    /// </summary>
    public class Form1 : System.WinForms.Form
    {
        /// <summary>
        ///    Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components;
		private System.WinForms.ListBox listBox1;
		private System.WinForms.Button button1;

        public Form1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        ///    Clean up any resources being used.
        /// </summary>
        public override void Dispose()
        {
            base.Dispose();
            components.Dispose();
        }

        /// <summary>
        ///    Required method for Designer support - do not modify
        ///    the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container ();
			this.button1 = new System.WinForms.Button ();
			this.listBox1 = new System.WinForms.ListBox ();
			//@this.TrayHeight = 0;
			//@this.TrayLargeIcon = false;
			//@this.TrayAutoArrange = true;
			button1.Location = new System.Drawing.Point (88, 16);
			button1.Size = new System.Drawing.Size (80, 24);
			button1.TabIndex = 0;
			button1.Text = "打开文件";
			button1.Click += new System.EventHandler (this.button1_Click);
			listBox1.Location = new System.Drawing.Point (24, 48);
			listBox1.Size = new System.Drawing.Size (256, 208);
			listBox1.TabIndex = 1;
			this.Text = "Form1";
			this.AutoScaleBaseSize = new System.Drawing.Size (6, 14);
			this.Controls.Add (this.listBox1);
			this.Controls.Add (this.button1);
		}

		protected void button1_Click (object sender, System.EventArgs e)
		{
        OpenFileDialog fdlg = new OpenFileDialog();
        fdlg.Title = "C# Corner Open File Dialog" ;
        fdlg.InitialDirectory = @"c:\" ;
        fdlg.Filter = "All files (*.*)|*.*|All files (*.*)|*.*" ;
        fdlg.FilterIndex = 2 ;
        fdlg.RestoreDirectory = true ;
        if(fdlg.ShowDialog() == DialogResult.OK)
        // {
        // textBox1.Text = fdlg.FileName ;
		// }
		{
  	    File fIn=new File(fdlg.FileName);
       StreamReader strm=fIn.OpenText();
       //  循环读取文件
       string sLine;
       do
       {
        sLine=strm.ReadLine();
        AddItem(sLine);
       }
       while (sLine!=null);
	   strm.Close();
		}
       }

     private int iItems=0;
    public void AddItem(string sItem)
    {
      object oItem=sItem;
      listBox1.InsertItem(iItems,oItem);
      ++iItems;

    }

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        public static void Main(string[] args) 
        {
            Application.Run(new Form1());
        }
    }
}