1，首先导入命名空间：using System.Runtime.InteropServices;

2，声明API函数

        [DllImport("kernel32")]

        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

3,创建ini文件

            WritePrivateProfileString("MyQQ", "ID", "798033502", @"C:\QQ.ini");

            WritePrivateProfileString("MyQQ", "PWD", "**********", @"C:\QQ.ini");

4，声明API函数

        [DllImport("kernel32")]

        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

5，读取ini文件

           StringBuilder temp = new StringBuilder();

            GetPrivateProfileString("MyQQ", "ID", "账号错误", temp, 255, @"C:\QQ.ini");             string ID = temp.ToString();             GetPrivateProfileString("MyQQ", "PWD", "读取出错", temp, 255, @"C:\QQ.ini");             string PWD = temp.ToString();             MessageBox.Show(ID + ":" + PWD);

6完整代码如下：

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;

namespace WindowsFormsApplication1

{     public partial class Main : Form     {         public Main()         {             InitializeComponent();         }         [DllImport("kernel32")]         private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);         private void button1_Click(object sender, EventArgs e)         {             WritePrivateProfileString("MyQQ", "ID", "798033502", @"C:\QQ.ini");             WritePrivateProfileString("MyQQ", "PWD", "**********", @"C:\QQ.ini");         }         [DllImport("kernel32")]         private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);                 private void btnRead_Click(object sender, EventArgs e)         {             StringBuilder temp = new StringBuilder();             GetPrivateProfileString("MyQQ", "ID", "账号错误", temp, 255, @"C:\QQ.ini");             string ID = temp.ToString();             GetPrivateProfileString("MyQQ", "PWD", "读取出错", temp, 255, @"C:\QQ.ini");             string PWD = temp.ToString();             MessageBox.Show(ID + ":" + PWD);         }     } }

 

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