用c#读写ini文件

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.IO;
using System.Text;

namespace ex84_readWriteIni
{
 /// <summary>
 /// Form1 的摘要说明。
 /// 

 /// zhanghua 2005-7-28
 /// 
 /// </summary>
 /// 
 public class Form1 : System.Windows.Forms.Form
 {
  /// <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 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.button1 = new System.Windows.Forms.Button();
   this.SuspendLayout();
   // 
   // button1
   // 
   this.button1.Location = new System.Drawing.Point(192, 112);
   this.button1.Name = "button1";
   this.button1.TabIndex = 0;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   // 
   // Form1
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(292, 273);
   this.Controls.Add(this.button1);
   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());
  }

  /// <summary>
  /// 添加GetPrivateProfileInt等6个API函数的声明和FILE_NAME常量的声明
  /// </summary>
  //declare begin  by zhanghua
  [DllImport("kernel32")]
   private static extern int GetPrivateProfileInt(
      string  lpApplicationName,
      string lpKeyName,  
      int   nDefault,
      string  lpFileName);
  [DllImport("kernel32")]
   private static extern bool GetPrivateProfileString(
     string  lpApplicationName,
     string  lpKeyName, 
     string  lpDefault,
     StringBuilder   lpReturnedString ,
     int     nSize,
     string lpFileName);
  [DllImport("kernel32")]
   private static extern bool WritePrivateProfileString(
     string  lpApplicationName,
     string  lpKeyName,
     string  lpString,
     string  lpFileName);

  [DllImport("kernel32")]
   private static  extern bool GetPrivateProfileSection(
     string   lpAppName,
     StringBuilder lpReturnedString,
     int    nSize,
     string   lpFileName );
  [DllImport("kernel32")]
   private static extern bool  WritePrivateProfileSection(
     string  lpAppName,
     string      lpString,
     string  lpFileName);

  private System.Windows.Forms.Button button1;

  public const string FILE_NAME ="C://Visual Studio Projects//ex84_readWriteIni//test.ini";
  // declare end
        
  private void Form1_Load(object sender, System.EventArgs e)
  {
   if (File.Exists(FILE_NAME))
   {
    StringBuilder strCaption = new StringBuilder(256);
    GetPrivateProfileString("Form", "Caption","Default Caption",
     strCaption,
     strCaption.Capacity,
     FILE_NAME);
    this.Text= strCaption.ToString();
    
    int myWidth= GetPrivateProfileInt("Form", "Width", this.Width,FILE_NAME);
    this.Width=myWidth;

    int myHeight= GetPrivateProfileInt("Form","Height", this.Height,FILE_NAME);
    this.Height= myHeight;

    int  myLeft= GetPrivateProfileInt("Form","Left", this.Left,FILE_NAME);
    this.Left=myLeft;

    int myTop = GetPrivateProfileInt("Form","Top", this.Top, FILE_NAME);

    this.Top=myTop;
   }
  }

  //当按钮被点击， 保存窗体的位置和大小信息到test.ini 文件中，响应代码如下：

  private void button1_Click(object sender, System.EventArgs e)
  {
   string  strCaption = this.Text;
   WritePrivateProfileString("Form", "Caption", strCaption, FILE_NAME);
   WritePrivateProfileString("Form",  "Width", this.Width.ToString(), FILE_NAME);
   WritePrivateProfileString("Form",  "Hight", this.Height.ToString(), FILE_NAME);
   WritePrivateProfileString("Form",  "Left", this.Left.ToString(), FILE_NAME);
   WritePrivateProfileString("Form",  "Top", this.Top.ToString(), FILE_NAME);
  }