[C#/winform] 讀寫ini檔

ini檔為windows內常用來儲存setting的檔案,C#範例如下。

dllimport為必須要的,會動態連結到system32的檔案,


WritePrivateProfileString(string section, string key, string val, string filePath)寫入ini檔案


GetPrivateProfileString( string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString,uint nSize, string lpFileName)讀取ini檔案

P.S.此範例為自動抓取RS-232 port放入comboBox1內,尚未寫完,但讀寫ini的部分是完整的

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

namespace Test_INI
{
    public partial class Form1 : Form
    {
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
 
        public Form1()
        {
            InitializeComponent();

            string[] port_list = SerialPort.GetPortNames();
            foreach (string port in port_list)
            {
                //MessageBox.Show("本機可用serial port: " + port); //測試用
                comboBox1.Items.Add(port);
            }
            //當select port index換的時候 ,加入WritePrivateProfileString("Port Name", "name", 選擇的port
            //string, @"D:\myConfig.ini");//寫入ini檔
            WritePrivateProfileString("Port Name", "name", "COM1", @"D:\myConfig.ini");//寫入ini檔
            WritePrivateProfileString("ModBus", "number", "1", @"D:\myConfig.ini");//寫入ini檔
            WritePrivateProfileString("ModBus", "number", "2", @"D:\myConfig.ini");//寫入ini檔
        }

        private void button1_Click(object sender, EventArgs e)
        {
            StringBuilder data = new StringBuilder(255);
            GetPrivateProfileString("Port Name", "name", "NA", data, 255,          
            @"D:\myConfig.ini");//section/key/def/ stringbuilder的變數/長度/路徑
            MessageBox.Show(data.ToString());
        }
    }
}

[C#/winform] 不同解析度調整視窗大小

利用DPI取得螢幕解析度比例,進而改變WinForm的大小

如上,DPI可能為

DPI	大小百分比
96	100%
120	125%
144	150%

廢話不多說

// 找出字體大小,並算出比例

float dpiX, dpiY;

Graphics graphics = this.CreateGraphics();

dpiX = graphics.DpiX;

dpiY = graphics.DpiY;

int intPercent = (dpiX == 96) ? 100 : (dpiX == 120) ? 125 : 150;

// 針對字體變更Form的大小

this.Height = this.Height * intPercent / 100;

this.Width = this.Width * intPercent / 100;

end.