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 ReadWriteINI
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [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);

        public static string FILE_NAME;

        private void Form1_Load(object sender, EventArgs e)
        {
            FILE_NAME = Application.StartupPath + "//test.ini";
            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;
            }
        }

        private void button1_Click(object sender, 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);

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs 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);

        }

  }
} 

 

上面是C#中读写INI文件的一个范例代码，关键函数是在类定义那一段，那些函数仅作为声明，无需用户定义，它们也是固定的，可以满足基本的INI读写操作。

INI设置可以保存用户对于程序设置的修改等，可以防止系统设置出现空白而导致的错误。