DataDoc.App/Helper/IniFileHelper.cs

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

namespace DataDoc.App.Helper
{
    /// <summary>
    /// 版权所有: 版权所有(C) 2011，Cloudin.
    /// 内容摘要: INI文件读写类
    /// 完成日期：2011年6月11日
    /// 版    本：V1.0 
    /// 作    者：Adin
    /// </summary>
    public class IniFileHelper
    {
        /// <summary> 
        /// The maximum size of a section in an ini file. 
        /// </summary> 
        /// <remarks> 
        /// This property defines the maximum size of the buffers 
        /// used to retreive data from an ini file.  This value is 
        /// the maximum allowed by the win32 functions 
        /// GetPrivateProfileSectionNames() or 
        /// GetPrivateProfileString(). 
        /// </remarks> 
        public const int MaxSectionSize = 32767; // 32 KB 

        //The path of the file we are operating on. 
        private string m_path;

        #region P/Invoke declares

        /// <summary> 
        /// A static class that provides the win32 P/Invoke signatures 
        /// used by this class. 
        /// </summary> 
        /// <remarks> 
        /// Note:  In each of the declarations below, we explicitly set CharSet to 
        /// Auto.  By default in C#, CharSet is set to Ansi, which reduces 
        /// performance on windows 2000 and above due to needing to convert strings 
        /// from Unicode (the native format for all .Net strings) to Ansi before 
        /// marshalling.  Using Auto lets the marshaller select the Unicode version of 
        /// these functions when available. 
        /// </remarks> 
        [System.Security.SuppressUnmanagedCodeSecurity]
        private static class NativeMethods
        {
            [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
            public static extern int GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer,
                                                                   uint nSize,
                                                                   string lpFileName);

            [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
            public static extern uint GetPrivateProfileString(string lpAppName,
                                                              string lpKeyName,
                                                              string lpDefault,