Mobile Ini文件访问类(C#编写，基于Compact Framework 2.0)

高效的Ini文件访问类(C#编写，基于Compact Framework 2.0)，在网上也搜索到几种C#的算法，只是感觉效率太低，就改进了一下算法，只完成ini文件操作的基本功能，效率提高10-30倍。但是本方法没有考虑到其他的一些ini文件的特性（比如文件内可能有空行），故特殊情况下可能要修改代码。

 

类文件内容如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

public class IniCF
{
    /// <summary>
    /// Copyright (C) 2008 lgamoy@163.com
    /// Ini文件访问类(基于Compact Framework 2.0)
    /// 说明：该类是在Window Mobile上使用的，所以为了保证执行高效，丢失了一些ini文件的特性。比如文件中不能有空行，否则读取不到。

    // Fields
    public string path = string.Empty;

    // Methods
    public IniCF(string iniFilePath)
    {
        this.path = iniFilePath;
    }
    #region 读取
    /// <summary>
    /// 读取
    /// </summary>
    /// <param name="ApplicationName">节名</param>
    /// <param name="KeyName">键名</param>
    /// <param name="Default">默认值</param>
    /// <param name="FileName">ini文件名</param>
    /// <returns></returns>
    private string GetPrivateProfileString(string ApplicationName, string KeyName, string Default, string FileName)
    {
        string str = string.Format("[{0}]", ApplicationName);
        string str2 = KeyName + "=";
        StreamReader reader = null;
        try
        {
            string str3 = string.Empty;
            bool flag = false;
            reader = new StreamReader(FileName, Encoding.Default);
            str3 = reader.ReadLine();
            for (str3 = (str3 == null) ? string.Empty : str3.Trim(); str3.Length > 0; str3 = (str3 == null) ? string.Empty : str3.Trim())
            {
                if (!flag)
                {
                    if (str3 == str)
                    {
                        flag = true;
                    }
                }
                else
                {
                    if (str3.StartsWith("[") && str3.EndsWith("]"))
                    {
                        return Default;
                    }
                    if (str3.StartsWith(str2))
                    {
                        return str3.Substring(KeyName.Length + 1);
                    }
                }
                str3 = reader.ReadLine();
            }
        }
        catch
        {
        }
        finally
        {
            if (reader != null)
            {
                reader.Close();
            }
        }
        return Default;
    }
    #endregion

    #region 写入

    /// <summary>
    /// ini文件写入
    /// </summary>
    /// <param name="ApplicationName">节名</param>
    /// <param name="KeyName">键名</param>
    /// <param name="Value">要写入的值</param>
    /// <param name="FileName">ini文件</param>
    private void WritePrivateProfileString(string ApplicationName, string KeyName, string Value, string FileName)
    {
        string str = string.Format("[{0}]", ApplicationName);
        string str2 = KeyName + "=";
        try
        {
            StringBuilder builder = new StringBuilder();
            bool flag = false;
            bool flag2 = false;
            bool flag3 = true;
            StreamReader reader = new StreamReader(FileName, Encoding.Default);
            string str3 = reader.ReadLine();
            for (str3 = (str3 == null) ? string.Empty : str3.Trim(); str3.Length > 0; str3 = (str3 == null) ? string.Empty : str3.Trim())
            {
                if (flag3)
                {
                    if (!flag2)
                    {
                        builder.Append((builder.Length == 0) ? string.Empty : "/r/n");
                        builder.Append(str3);
                        if (str3 == str)
                        {
                            flag2 = true;
                        }
                    }
                    else if (str3.StartsWith("[") && str3.EndsWith("]"))
                    {
                        builder.Append(string.Format("/r/n{0}={1}", KeyName, Value));
                        builder.Append(string.Format("/r/n{0}", str3));
                        flag = true;
                        flag3 = false;
                    }
                    else if (str3.StartsWith(str2))
                    {
                        builder.Append(string.Format("/r/n{0}={1}", KeyName, Value));
                        flag = true;
                        flag3 = false;
                    }
                    else
                    {
                        builder.Append(string.Format("/r/n{0}", str3));
                    }
                }
                else
                {
                    builder.Append(string.Format("/r/n{0}", str3));
                }
                str3 = reader.ReadLine();
            }
            reader.Close();
            if (!flag2)
            {
                builder.Append((builder.Length == 0) ? string.Empty : "/r/n");
                builder.Append(string.Format("[{0}]", ApplicationName));
            }
            if (!flag)
            {
                builder.Append(string.Format("/r/n{0}={1}", KeyName, Value));
            }
            StreamWriter writer = new StreamWriter(FileName, false, Encoding.Default);
            writer.Write(builder);
            writer.Close();
        }
        catch
        {
        }
    }

    #endregion

    public string IniReadValue(string Section, string Key)
    {
        return this.GetPrivateProfileString(Section, Key, string.Empty, this.path);
    }

    public void IniWriteValue(string Section, string Key, string Value)
    {
        this.WritePrivateProfileString(Section, Key, Value, this.path);
    }
}