详解C#如何实现读写ini文件

目录

• 介绍
• 1.创建一个ini文件
• 2.创建一个winform界面
• 3.添加一个ini管理类
• 4.添加winform代码

介绍

INI文件格式由节、键、值组成。

节

[section]

参数

（键=值）

name=value

1.创建一个ini文件

在Debug目录下创建一个ini文件，写入下面内容，注意编码格式用ANSI。

[Information]

Name=周星星

Gender=男

Age=55

Region=香港

2.创建一个winform界面

如下图

3.添加一个ini管理类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
 
namespace Test1
{
   public static class IniFunc
    {
        /// 

        /// 获取值
        /// 
        /// 段落名
        /// 键名
        /// 读取异常是的缺省值
        /// 键名所对应的的值，没有找到返回空值
        /// 返回值允许的大小
        /// ini文件的完整路径
        /// 
        [DllImport("kernel32.dll")]
        private static extern int GetPrivateProfileString(
            string section,
            string key,
            string defval,
            StringBuilder retval,
            int size,
            string filepath);
 
        /// 

        /// 写入
        /// 
        /// 需要写入的段落名
        /// 需要写入的键名
        /// 写入值
        /// ini文件的完整路径
        /// 
        [DllImport("kernel32.dll")]
        private static extern int WritePrivateProfileString(
            string section,
            string key,
            string val,
            string filepath);
 
 
        /// 

        /// 获取数据
        /// 
        /// 段落名
        /// 键名
        /// 没有找到时返回的默认值
        /// ini文件完整路径
        /// 
        public static string getString(string section, string key, string def, string filename)
        {
            StringBuilder sb = new StringBuilder(1024);
            GetPrivateProfileString(section, key, def, sb, 1024, filename);
            return sb.ToString();
        }
 
        /// 

        /// 写入数据
        /// 
        /// 段落名
        /// 键名
        /// 写入值
        /// ini文件完整路径
        public static void writeString(string section, string key, string val, string filename)
        {
            WritePrivateProfileString(section, key, val, filename);
        }
    }
}

4.添加winform代码

双击winform界面，加入下面代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace Test1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private string filename = null;
 
        private void Form1_Load(object sender, EventArgs e)
        {
            filename = Application.StartupPath + "\\Config.ini";
        }
 
        /// 

        /// 读取
        /// 
        /// 
        /// 
        private void Button_Read_Click(object sender, EventArgs e)
        {
            string names = IniFunc.getString("Information", "Name", null, filename);
            string gender = IniFunc.getString("Information", "Gender", null, filename);
            string age = IniFunc.getString("Information", "Age", null, filename);
            string region = IniFunc.getString("Information", "Region", null, filename);
 
            TextBox_Name.Text = names;
            TextBox_Gender.Text = gender;
            TextBox_Age.Text = age;
            TextBox_Region.Text = region;
        }
 
        /// 

        /// 写入
        /// 
        /// 
        /// 
        private void Button_Write_Click(object sender, EventArgs e)
        {
            string names = TextBox_Name.Text;
            string gender = TextBox_Gender.Text;
            string age = TextBox_Age.Text;
            string region = TextBox_Region.Text;
 
            IniFunc.writeString("Information", "Name", names, filename);
            IniFunc.writeString("Information", "Gender", gender, filename);
            IniFunc.writeString("Information", "Age", age, filename);
            IniFunc.writeString("Information", "Region", region, filename);
        }
 
        /// 

        /// 清空
        /// 
        /// 
        /// 
        private void Button_Clear_Click(object sender, EventArgs e)
        {
            TextBox_Name.Text = string.Empty;
            TextBox_Gender.Text = string.Empty;
            TextBox_Age.Text = string.Empty;
            TextBox_Region.Text = string.Empty;
        }
    }
}

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