ini文件读写

using System;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;


namespace IniHelperDemo
{
    public class IniConfigHelper
    {
        #region API函数声明

        [DllImport("kernel32")]//返回0表示失败，非0为成功
        private static extern long WritePrivateProfileString(string section, string key,
            string val, string filePath);

        [DllImport("kernel32")]//返回取得字符串缓冲区的长度
        private static extern long GetPrivateProfileString(string section, string key,
            string def, StringBuilder retVal, int size, string filePath);


        #endregion

        #region 读Ini文件

        public static string ReadIniData(string Section, string Key, string NoText, string iniFilePath)
        {
            if (File.Exists(iniFilePath))
            {
                StringBuilder temp = new StringBuilder(1024);
                GetPrivateProfileString(Section, Key, NoText, temp, 1024, iniFilePath);
                return temp.ToString();
            }
            else
            {
                return String.Empty;
            }
        }

        #endregion

        #region 写Ini文件

        public static bool WriteIniData(string Section, string Key, string Value, string iniFilePath)
        {
            if (File.Exists(iniFilePath))
            {
                long OpStation = WritePrivateProfileString(Section, Key, Value, iniFilePath);
                if (OpStation == 0)
                {
                    return false;
                }
                else
                {
                    return true;
                }
            }
            else
            {
                return false;
            }
        }

        #endregion
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace IniHelperDemo
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
            this.Load += FrmMain_Load;
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            this.txt_IP.Text = IniConfigHelper.ReadIniData("PLC参数", "IP", "", ConfigPath);
            this.txt_Port.Text = IniConfigHelper.ReadIniData("PLC参数", "Port", "", ConfigPath);
        }

        private string ConfigPath = Application.StartupPath + "\\Config.ini";
        private void Btn_Save_Click(object sender, EventArgs e)
        {
            if (!File.Exists(ConfigPath))
            {
                FileStream fs = new FileStream(ConfigPath, FileMode.Create);
                fs.Close();
            }

            bool Result = true;

            Result&= IniConfigHelper.WriteIniData("PLC参数", "IP", this.txt_IP.Text.Trim(), ConfigPath);

            Result &= IniConfigHelper.WriteIniData("PLC参数", "Port", this.txt_Port.Text.Trim(), ConfigPath);

            if (Result)
            {
                MessageBox.Show("保存成功", "保存参数");
            }
            else
            {
                MessageBox.Show("保存失败", "保存参数");
            }
        }

        private void Btn_Close_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}