using System;
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using System.Reflection;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace XImaging.Automation.Library.HxDriverLib
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{
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/// <summary>
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/// INI文件读写类
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/// </summary>
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public class IniHelper
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{
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#region API函数声明
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[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] //返回0表示失败，非0为成功
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private static extern bool WritePrivateProfileString(string section, string key,
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string val, string filePath);
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[DllImport("kernel32.dll", CharSet = CharSet.Auto)] //返回取得字符串缓冲区的长度
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private static extern uint GetPrivateProfileString(string section, string key,
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string def, StringBuilder retVal, int size, string filePath);
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#endregion
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#region 封装
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/// <summary>
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/// 从INI文件读取值
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="iniFile"></param>
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/// <param name="section"></param>
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/// <param name="key"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static T IniGetValue<T>(string iniFile, string section, string key, T defaultValue = default(T))
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{
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if (string.IsNullOrEmpty(section))
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{
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LogConstant.logger.Print("未指定节点名称(Section)");
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return defaultValue;
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}
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if (string.IsNullOrEmpty(key))
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{
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LogConstant.logger.Print("未指定节点名称(Key)");
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return defaultValue;
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}
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string strValue = defaultValue.ToString(); ;
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const int SIZE = 1024 * 10;
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StringBuilder sb = new StringBuilder(SIZE);
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uint bytesReturned = GetPrivateProfileString(section, key, defaultValue.ToString(), sb, SIZE, iniFile);
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if (bytesReturned != 0)
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strValue = sb.ToString();
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sb = null;
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Type t = typeof(T);
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if (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>)) //支持可空类型
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t = t.GetGenericArguments()[0];
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var tryParse = t.GetMethod("TryParse", BindingFlags.Public | BindingFlags.Static, Type.DefaultBinder
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, new Type[] { strValue.GetType(), t.MakeByRefType() }
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, new ParameterModifier[] { new ParameterModifier(2) });
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if (tryParse != null)
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{
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var parameters = new object[] { strValue, Activator.CreateInstance(t) };
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bool success = (bool)tryParse.Invoke(null, parameters);
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if (success)
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return (T)parameters[1];
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else
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return defaultValue;
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}
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return (T)Convert.ChangeType(strValue, typeof(T));
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}
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/// <summary>
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/// 向INI文件写值
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="iniFile"></param>
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/// <param name="section"></param>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public static bool IniWriteValue<T>(string iniFile, string section, string key, T value)
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{
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if (string.IsNullOrEmpty(section))
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{
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LogConstant.logger.Print("未指定节点名称(Section)");
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return false;
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}
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if (string.IsNullOrEmpty(key))
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{
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LogConstant.logger.Print("未指定节点名称(Key)");
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return false;
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}
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return WritePrivateProfileString(section, key, value.ToString(), iniFile);
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}
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#endregion
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}
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}
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