using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace Audit.ViewModel
{
    public class ReadIni
    {
         /// <summary>
         /// 为INI文件中指定的节点取得字符串
         /// </summary>
         /// <param name="lpAppName">欲在其中查找关键字的节点名称</param>
         /// <param name="lpKeyName">欲获取的项名</param>
         /// <param name="lpDefault">指定的项没有找到时返回的默认值</param>
         /// <param name="lpReturnedString">指定一个字串缓冲区，长度至少为nSize</param>
         /// <param name="nSize">指定装载到lpReturnedString缓冲区的最大字符数量</param>
         /// <param name="lpFileName">INI文件完整路径</param>
         /// <returns>复制到lpReturnedString缓冲区的字节数量，其中不包括那些NULL中止字符</returns>
         [DllImport("kernel32")]
         private static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);
 
         /// <summary>
         /// 修改INI文件中内容
         /// </summary>
         /// <param name="lpApplicationName">欲在其中写入的节点名称</param>
         /// <param name="lpKeyName">欲设置的项名</param>
         /// <param name="lpString">要写入的新字符串</param>
         /// <param name="lpFileName">INI文件完整路径</param>
         /// <returns>非零表示成功，零表示失败</returns>
         [DllImport("kernel32")]
         private static extern int WritePrivateProfileString(string lpApplicationName, string lpKeyName, string lpString, string lpFileName);

        public static string  ReadIniData(string section, string key, string def, string filePath)//读取INI文件
        {
            StringBuilder sb = new StringBuilder(1024);
            GetPrivateProfileString(section, key, def, sb, 1024, filePath);
            return sb.ToString();
        }

         /// <summary>
         /// 写INI文件值
         /// </summary>
         /// <param name="section">欲在其中写入的节点名称</param>
         /// <param name="key">欲设置的项名</param>
         /// <param name="value">要写入的新字符串</param>
         /// <param name="filePath">INI文件完整路径</param>
         /// <returns>非零表示成功，零表示失败</returns>
        public static int WriteData(string section, string key, string value, string filePath)
        {
            return WritePrivateProfileString(section, key, value, filePath);
        }

         /// <summary>
         /// 删除节
         /// </summary>
         /// <param name="section">节点名</param>
         /// <param name="filePath">INI文件完整路径</param>
         /// <returns>非零表示成功，零表示失败</returns>
        public static int DeleteSection(string section, string filePath)
        {
            return WriteData(section, null, null, filePath);
        }

         /// <summary>
         /// 删除键的值
         /// </summary>
         /// <param name="section">节点名</param>
         /// <param name="key">键名</param>
         /// <param name="filePath">INI文件完整路径</param>
         /// <returns>非零表示成功，零表示失败</returns>
         public static int DeleteKey(string section, string key, string filePath)
         {
             return WriteData(section, key, null, filePath);
         }
}
}