在做项目过程中,有时需要保存一些简单的配置信息,可以使用xml,也可以使用INI文件。下面是C#中读取INI的方法,相信大部分朋友都使用过这种方式。 INI文件的存储方式如下,
- [section]
- key=value
- key=value
[section] key=value key=value
读取写入方法,
- [DllImport("kernel32")]
- privatestaticexternlong WritePrivateProfileString(string section, string key, string val, string filePath);
- [DllImport("kernel32")]
- privatestaticexternint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName);
- privatestaticstring ReadString(string section, string key, string def, string filePath)
- {
- StringBuilder temp = new StringBuilder(1024);
- try
- {
- GetPrivateProfileString(section, key, def, temp, 1024, filePath);
- }
- catch
- { }
- return temp.ToString();
- }
- /// <summary>
- /// 根据section取所有key
- /// </summary>
- /// <param name="section"></param>
- /// <param name="filePath"></param>
- /// <returns></returns>
- publicstaticstring[] ReadIniAllKeys(string section,string filePath)
- {
- UInt32 MAX_BUFFER = 32767;
- string[] items = newstring[0];
- IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char));
- UInt32 bytesReturned = GetPrivateProfileSection(section, pReturnedString, MAX_BUFFER, filePath);
- if (!(bytesReturned == MAX_BUFFER - 2) || (bytesReturned == 0))
- {
- string returnedString = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned);
- items = returnedString.Split(newchar[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
- }
- Marshal.FreeCoTaskMem(pReturnedString);
- return items;
- }
- /// <summary>
- /// 根据section,key取值
- /// </summary>
- /// <param name="section"></param>
- /// <param name="keys"></param>
- /// <param name="filePath">ini文件路径</param>
- /// <returns></returns>
- publicstaticstring ReadIniKeys(string section, string keys, string filePath)
- {
- return ReadString(section, keys, "", filePath);
- }
- /// <summary>
- /// 保存ini
- /// </summary>
- /// <param name="section"></param>
- /// <param name="key"></param>
- /// <param name="value"></param>
- /// <param name="filePath">ini文件路径</param>
- publicstaticvoid WriteIniKeys(string section, string key, string value, string filePath)
- {
- WritePrivateProfileString(section, key, value, filePath);
- }
[DllImport("kernel32")] private static extern long WritePrivateProfileString(string section, string key, string val, string filePath); [DllImport("kernel32")] private static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName); [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName); private static string ReadString(string section, string key, string def, string filePath) { StringBuilder temp = new StringBuilder(1024); try { GetPrivateProfileString(section, key, def, temp, 1024, filePath); } catch { } return temp.ToString(); } /// <summary> /// 根据section取所有key /// </summary> /// <param name="section"></param> /// <param name="filePath"></param> /// <returns></returns> public static string[] ReadIniAllKeys(string section,string filePath) { UInt32 MAX_BUFFER = 32767; string[] items = new string[0]; IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char)); UInt32 bytesReturned = GetPrivateProfileSection(section, pReturnedString, MAX_BUFFER, filePath); if (!(bytesReturned == MAX_BUFFER - 2) || (bytesReturned == 0)) { string returnedString = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned); items = returnedString.Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries); } Marshal.FreeCoTaskMem(pReturnedString); return items; } /// <summary> /// 根据section,key取值 /// </summary> /// <param name="section"></param> /// <param name="keys"></param> /// <param name="filePath">ini文件路径</param> /// <returns></returns> public static string ReadIniKeys(string section, string keys, string filePath) { return ReadString(section, keys, "", filePath); } /// <summary> /// 保存ini /// </summary> /// <param name="section"></param> /// <param name="key"></param> /// <param name="value"></param> /// <param name="filePath">ini文件路径</param> public static void WriteIniKeys(string section, string key, string value, string filePath) { WritePrivateProfileString(section, key, value, filePath); }
如果要删除某一项:
- WriteIniKeys(section, key, null, recordIniPath);
WriteIniKeys(section, key, null, recordIniPath);
如上就可以读取和写入了,那么INI文件如何创建呢?
- [DllImport("kernel32")]
- publicstaticexternlong WritePrivateProfileString(string section, string key, string value, string iniPath);
[DllImport("kernel32")] public static extern long WritePrivateProfileString(string section, string key, string value, string iniPath);
调用该方法,即可创建你的ini文件和想要保存的值。
当然上面的ini操作并不是很详细的,以下从http://blog.csdn.net/sdfkfkd/article/details/7050733的博客转载的一片描述INI操作的,比较详细,值得学习。
- publicclass INIOperationClass
- {
- #region INI文件操作
- /*
- * 针对INI文件的API操作方法,其中的节点(Section)、键(KEY)都不区分大小写
- * 如果指定的INI文件不存在,会自动创建该文件。
- *
- * CharSet定义的时候使用了什么类型,在使用相关方法时必须要使用相应的类型
- * 例如 GetPrivateProfileSectionNames声明为CharSet.Auto,那么就应该使用 Marshal.PtrToStringAuto来读取相关内容
- * 如果使用的是CharSet.Ansi,就应该使用Marshal.PtrToStringAnsi来读取内容
- *
- */
- #region API声明
- /// <summary>
- /// 获取所有节点名称(Section)
- /// </summary>
- /// <param name="lpszReturnBuffer">存放节点名称的内存地址,每个节点之间用\0分隔</param>
- /// <param name="nSize">内存大小(characters)</param>
- /// <param name="lpFileName">Ini文件</param>
- /// <returns>内容的实际长度,为0表示没有内容,为nSize-2表示内存大小不够</returns>
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, uint nSize, string lpFileName);
- /// <summary>
- /// 获取某个指定节点(Section)中所有KEY和Value
- /// </summary>
- /// <param name="lpAppName">节点名称</param>
- /// <param name="lpReturnedString">返回值的内存地址,每个之间用\0分隔</param>
- /// <param name="nSize">内存大小(characters)</param>
- /// <param name="lpFileName">Ini文件</param>
- /// <returns>内容的实际长度,为0表示没有内容,为nSize-2表示内存大小不够</returns>
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName);
- /// <summary>
- /// 读取INI文件中指定的Key的值
- /// </summary>
- /// <param name="lpAppName">节点名称。如果为null,则读取INI中所有节点名称,每个节点名称之间用\0分隔</param>
- /// <param name="lpKeyName">Key名称。如果为null,则读取INI中指定节点中的所有KEY,每个KEY之间用\0分隔</param>
- /// <param name="lpDefault">读取失败时的默认值</param>
- /// <param name="lpReturnedString">读取的内容缓冲区,读取之后,多余的地方使用\0填充</param>
- /// <param name="nSize">内容缓冲区的长度</param>
- /// <param name="lpFileName">INI文件名</param>
- /// <returns>实际读取到的长度</returns>
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, [In, Out] char[] lpReturnedString, uint nSize, string lpFileName);
- //另一种声明方式,使用 StringBuilder 作为缓冲区类型的缺点是不能接受\0字符,会将\0及其后的字符截断,
- //所以对于lpAppName或lpKeyName为null的情况就不适用
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, uint nSize, string lpFileName);
- //再一种声明,使用string作为缓冲区的类型同char[]
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- privatestaticexternuint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, string lpReturnedString, uint nSize, string lpFileName);
- /// <summary>
- /// 将指定的键值对写到指定的节点,如果已经存在则替换。
- /// </summary>
- /// <param name="lpAppName">节点,如果不存在此节点,则创建此节点</param>
- /// <param name="lpString">Item键值对,多个用\0分隔,形如key1=value1\0key2=value2
- /// <para>如果为string.Empty,则删除指定节点下的所有内容,保留节点</para>
- /// <para>如果为null,则删除指定节点下的所有内容,并且删除该节点</para>
- /// </param>
- /// <param name="lpFileName">INI文件</param>
- /// <returns>是否成功写入</returns>
- [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
- [return: MarshalAs(UnmanagedType.Bool)] //可以没有此行
- privatestaticexternbool WritePrivateProfileSection(string lpAppName, string lpString, string lpFileName);
- /// <summary>
- /// 将指定的键和值写到指定的节点,如果已经存在则替换
- /// </summary>
- /// <param name="lpAppName">节点名称</param>
- /// <param name="lpKeyName">键名称。如果为null,则删除指定的节点及其所有的项目</param>
- /// <param name="lpString">值内容。如果为null,则删除指定节点中指定的键。</param>
- /// <param name="lpFileName">INI文件</param>
- /// <returns>操作是否成功</returns>
- [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
- [return: MarshalAs(UnmanagedType.Bool)]
- privatestaticexternbool WritePrivateProfileString(string lpAppName, string lpKeyName, string lpString, string lpFileName);
- #endregion
- #region 封装
- /// <summary>
- /// 读取INI文件中指定INI文件中的所有节点名称(Section)
- /// </summary>
- /// <param name="iniFile">Ini文件</param>
- /// <returns>所有节点,没有内容返回string[0]</returns>
- publicstaticstring[] INIGetAllSectionNames(string iniFile)
- {
- uint MAX_BUFFER = 32767; //默认为32767
- string[] sections = newstring[0]; //返回值
- //申请内存
- IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char));
- uint bytesReturned = INIOperationClass.GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, iniFile);
- if (bytesReturned != 0)
- {
- //读取指定内存的内容
- string local = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned).ToString();
- //每个节点之间用\0分隔,末尾有一个\0
- sections = local.Split(newchar[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
- }
- //释放内存
- Marshal.FreeCoTaskMem(pReturnedString);
- return sections;
- }
- /// <summary>
- /// 获取INI文件中指定节点(Section)中的所有条目(key=value形式)
- /// </summary>
- /// <param name="iniFile">Ini文件</param>
- /// <param name="section">节点名称</param>
- /// <returns>指定节点中的所有项目,没有内容返回string[0]</returns>
- publicstaticstring[] INIGetAllItems(string iniFile, string section)
- {
- //返回值形式为 key=value,例如 Color=Red
- uint MAX_BUFFER = 32767; //默认为32767
- string[] items = newstring[0]; //返回值
- //分配内存
- IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char));
- uint bytesReturned = INIOperationClass.GetPrivateProfileSection(section, pReturnedString, MAX_BUFFER, iniFile);
- if (!(bytesReturned == MAX_BUFFER - 2) || (bytesReturned == 0))
- {
- string returnedString = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned);
- items = returnedString.Split(newchar[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
- }
- Marshal.FreeCoTaskMem(pReturnedString); //释放内存
- return items;
- }
- /// <summary>
- /// 获取INI文件中指定节点(Section)中的所有条目的Key列表
- /// </summary>
- /// <param name="iniFile">Ini文件</param>
- /// <param name="section">节点名称</param>
- /// <returns>如果没有内容,反回string[0]</returns>
- publicstaticstring[] INIGetAllItemKeys(string iniFile, string section)
- {
- string[] value = newstring[0];
- constint SIZE = 1024 * 10;
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- char[] chars = newchar[SIZE];
- uint bytesReturned = INIOperationClass.GetPrivateProfileString(section, null, null, chars, SIZE, iniFile);
- if (bytesReturned != 0)
- {
- value = newstring(chars).Split(newchar[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
- }
- chars = null;
- return value;
- }
- /// <summary>
- /// 读取INI文件中指定KEY的字符串型值
- /// </summary>
- /// <param name="iniFile">Ini文件</param>
- /// <param name="section">节点名称</param>
- /// <param name="key">键名称</param>
- /// <param name="defaultValue">如果没此KEY所使用的默认值</param>
- /// <returns>读取到的值</returns>
- publicstaticstring INIGetStringValue(string iniFile, string section, string key, string defaultValue)
- {
- string value = defaultValue;
- constint SIZE = 1024 * 10;
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- if (string.IsNullOrEmpty(key))
- {
- thrownew ArgumentException("必须指定键名称(key)", "key");
- }
- StringBuilder sb = new StringBuilder(SIZE);
- uint bytesReturned = INIOperationClass.GetPrivateProfileString(section, key, defaultValue, sb, SIZE, iniFile);
- if (bytesReturned != 0)
- {
- value = sb.ToString();
- }
- sb = null;
- return value;
- }
- /// <summary>
- /// 在INI文件中,将指定的键值对写到指定的节点,如果已经存在则替换
- /// </summary>
- /// <param name="iniFile">INI文件</param>
- /// <param name="section">节点,如果不存在此节点,则创建此节点</param>
- /// <param name="items">键值对,多个用\0分隔,形如key1=value1\0key2=value2</param>
- /// <returns></returns>
- publicstaticbool INIWriteItems(string iniFile, string section, string items)
- {
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- if (string.IsNullOrEmpty(items))
- {
- thrownew ArgumentException("必须指定键值对", "items");
- }
- return INIOperationClass.WritePrivateProfileSection(section, items, iniFile);
- }
- /// <summary>
- /// 在INI文件中,指定节点写入指定的键及值。如果已经存在,则替换。如果没有则创建。
- /// </summary>
- /// <param name="iniFile">INI文件</param>
- /// <param name="section">节点</param>
- /// <param name="key">键</param>
- /// <param name="value">值</param>
- /// <returns>操作是否成功</returns>
- publicstaticbool INIWriteValue(string iniFile, string section, string key, string value)
- {
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- if (string.IsNullOrEmpty(key))
- {
- thrownew ArgumentException("必须指定键名称", "key");
- }
- if (value == null)
- {
- thrownew ArgumentException("值不能为null", "value");
- }
- return INIOperationClass.WritePrivateProfileString(section, key, value, iniFile);
- }
- /// <summary>
- /// 在INI文件中,删除指定节点中的指定的键。
- /// </summary>
- /// <param name="iniFile">INI文件</param>
- /// <param name="section">节点</param>
- /// <param name="key">键</param>
- /// <returns>操作是否成功</returns>
- publicstaticbool INIDeleteKey(string iniFile, string section, string key)
- {
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- if (string.IsNullOrEmpty(key))
- {
- thrownew ArgumentException("必须指定键名称", "key");
- }
- return INIOperationClass.WritePrivateProfileString(section, key, null, iniFile);
- }
- /// <summary>
- /// 在INI文件中,删除指定的节点。
- /// </summary>
- /// <param name="iniFile">INI文件</param>
- /// <param name="section">节点</param>
- /// <returns>操作是否成功</returns>
- publicstaticbool INIDeleteSection(string iniFile, string section)
- {
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- return INIOperationClass.WritePrivateProfileString(section, null, null, iniFile);
- }
- /// <summary>
- /// 在INI文件中,删除指定节点中的所有内容。
- /// </summary>
- /// <param name="iniFile">INI文件</param>
- /// <param name="section">节点</param>
- /// <returns>操作是否成功</returns>
- publicstaticbool INIEmptySection(string iniFile, string section)
- {
- if (string.IsNullOrEmpty(section))
- {
- thrownew ArgumentException("必须指定节点名称", "section");
- }
- return INIOperationClass.WritePrivateProfileSection(section, string.Empty, iniFile);
- }
- privatevoid TestIniINIOperation()
- {
- string file = "F:\\TestIni.ini";
- //写入/更新键值
- INIWriteValue(file, "Desktop", "Color", "Red");
- INIWriteValue(file, "Desktop", "Width", "3270");
- INIWriteValue(file, "Toolbar", "Items", "Save,Delete,Open");
- INIWriteValue(file, "Toolbar", "Dock", "True");
- //写入一批键值
- INIWriteItems(file, "Menu", "File=文件\0View=视图\0Edit=编辑");
- //获取文件中所有的节点
- string[] sections = INIGetAllSectionNames(file);
- //获取指定节点中的所有项
- string[] items = INIGetAllItems(file, "Menu");
- //获取指定节点中所有的键
- string[] keys = INIGetAllItemKeys(file, "Menu");
- //获取指定KEY的值
- string value = INIGetStringValue(file, "Desktop", "color", null);
- //删除指定的KEY
- INIDeleteKey(file, "desktop", "color");
- //删除指定的节点
- INIDeleteSection(file, "desktop");
- //清空指定的节点
- INIEmptySection(file, "toolbar");
- }
- #endregion
- #endregion
- }
public class INIOperationClass { #region INI文件操作 /* * 针对INI文件的API操作方法,其中的节点(Section)、键(KEY)都不区分大小写 * 如果指定的INI文件不存在,会自动创建该文件。 * * CharSet定义的时候使用了什么类型,在使用相关方法时必须要使用相应的类型 * 例如 GetPrivateProfileSectionNames声明为CharSet.Auto,那么就应该使用 Marshal.PtrToStringAuto来读取相关内容 * 如果使用的是CharSet.Ansi,就应该使用Marshal.PtrToStringAnsi来读取内容 * */ #region API声明 /// <summary> /// 获取所有节点名称(Section) /// </summary> /// <param name="lpszReturnBuffer">存放节点名称的内存地址,每个节点之间用\0分隔</param> /// <param name="nSize">内存大小(characters)</param> /// <param name="lpFileName">Ini文件</param> /// <returns>内容的实际长度,为0表示没有内容,为nSize-2表示内存大小不够</returns> [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, uint nSize, string lpFileName); /// <summary> /// 获取某个指定节点(Section)中所有KEY和Value /// </summary> /// <param name="lpAppName">节点名称</param> /// <param name="lpReturnedString">返回值的内存地址,每个之间用\0分隔</param> /// <param name="nSize">内存大小(characters)</param> /// <param name="lpFileName">Ini文件</param> /// <returns>内容的实际长度,为0表示没有内容,为nSize-2表示内存大小不够</returns> [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName); /// <summary> /// 读取INI文件中指定的Key的值 /// </summary> /// <param name="lpAppName">节点名称。如果为null,则读取INI中所有节点名称,每个节点名称之间用\0分隔</param> /// <param name="lpKeyName">Key名称。如果为null,则读取INI中指定节点中的所有KEY,每个KEY之间用\0分隔</param> /// <param name="lpDefault">读取失败时的默认值</param> /// <param name="lpReturnedString">读取的内容缓冲区,读取之后,多余的地方使用\0填充</param> /// <param name="nSize">内容缓冲区的长度</param> /// <param name="lpFileName">INI文件名</param> /// <returns>实际读取到的长度</returns> [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, [In, Out] char[] lpReturnedString, uint nSize, string lpFileName); //另一种声明方式,使用 StringBuilder 作为缓冲区类型的缺点是不能接受\0字符,会将\0及其后的字符截断, //所以对于lpAppName或lpKeyName为null的情况就不适用 [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, uint nSize, string lpFileName); //再一种声明,使用string作为缓冲区的类型同char[] [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, string lpReturnedString, uint nSize, string lpFileName); /// <summary> /// 将指定的键值对写到指定的节点,如果已经存在则替换。 /// </summary> /// <param name="lpAppName">节点,如果不存在此节点,则创建此节点</param> /// <param name="lpString">Item键值对,多个用\0分隔,形如key1=value1\0key2=value2 /// <para>如果为string.Empty,则删除指定节点下的所有内容,保留节点</para> /// <para>如果为null,则删除指定节点下的所有内容,并且删除该节点</para> /// </param> /// <param name="lpFileName">INI文件</param> /// <returns>是否成功写入</returns> [DllImport("kernel32.dll", CharSet = CharSet.Auto)] [return: MarshalAs(UnmanagedType.Bool)] //可以没有此行 private static extern bool WritePrivateProfileSection(string lpAppName, string lpString, string lpFileName); /// <summary> /// 将指定的键和值写到指定的节点,如果已经存在则替换 /// </summary> /// <param name="lpAppName">节点名称</param> /// <param name="lpKeyName">键名称。如果为null,则删除指定的节点及其所有的项目</param> /// <param name="lpString">值内容。如果为null,则删除指定节点中指定的键。</param> /// <param name="lpFileName">INI文件</param> /// <returns>操作是否成功</returns> [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] private static extern bool WritePrivateProfileString(string lpAppName, string lpKeyName, string lpString, string lpFileName); #endregion #region 封装 /// <summary> /// 读取INI文件中指定INI文件中的所有节点名称(Section) /// </summary> /// <param name="iniFile">Ini文件</param> /// <returns>所有节点,没有内容返回string[0]</returns> public static string[] INIGetAllSectionNames(string iniFile) { uint MAX_BUFFER = 32767; //默认为32767 string[] sections = new string[0]; //返回值 //申请内存 IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char)); uint bytesReturned = INIOperationClass.GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, iniFile); if (bytesReturned != 0) { //读取指定内存的内容 string local = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned).ToString(); //每个节点之间用\0分隔,末尾有一个\0 sections = local.Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries); } //释放内存 Marshal.FreeCoTaskMem(pReturnedString); return sections; } /// <summary> /// 获取INI文件中指定节点(Section)中的所有条目(key=value形式) /// </summary> /// <param name="iniFile">Ini文件</param> /// <param name="section">节点名称</param> /// <returns>指定节点中的所有项目,没有内容返回string[0]</returns> public static string[] INIGetAllItems(string iniFile, string section) { //返回值形式为 key=value,例如 Color=Red uint MAX_BUFFER = 32767; //默认为32767 string[] items = new string[0]; //返回值 //分配内存 IntPtr pReturnedString = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char)); uint bytesReturned = INIOperationClass.GetPrivateProfileSection(section, pReturnedString, MAX_BUFFER, iniFile); if (!(bytesReturned == MAX_BUFFER - 2) || (bytesReturned == 0)) { string returnedString = Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned); items = returnedString.Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries); } Marshal.FreeCoTaskMem(pReturnedString); //释放内存 return items; } /// <summary> /// 获取INI文件中指定节点(Section)中的所有条目的Key列表 /// </summary> /// <param name="iniFile">Ini文件</param> /// <param name="section">节点名称</param> /// <returns>如果没有内容,反回string[0]</returns> public static string[] INIGetAllItemKeys(string iniFile, string section) { string[] value = new string[0]; const int SIZE = 1024 * 10; if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } char[] chars = new char[SIZE]; uint bytesReturned = INIOperationClass.GetPrivateProfileString(section, null, null, chars, SIZE, iniFile); if (bytesReturned != 0) { value = new string(chars).Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries); } chars = null; return value; } /// <summary> /// 读取INI文件中指定KEY的字符串型值 /// </summary> /// <param name="iniFile">Ini文件</param> /// <param name="section">节点名称</param> /// <param name="key">键名称</param> /// <param name="defaultValue">如果没此KEY所使用的默认值</param> /// <returns>读取到的值</returns> public static string INIGetStringValue(string iniFile, string section, string key, string defaultValue) { string value = defaultValue; const int SIZE = 1024 * 10; if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } if (string.IsNullOrEmpty(key)) { throw new ArgumentException("必须指定键名称(key)", "key"); } StringBuilder sb = new StringBuilder(SIZE); uint bytesReturned = INIOperationClass.GetPrivateProfileString(section, key, defaultValue, sb, SIZE, iniFile); if (bytesReturned != 0) { value = sb.ToString(); } sb = null; return value; } /// <summary> /// 在INI文件中,将指定的键值对写到指定的节点,如果已经存在则替换 /// </summary> /// <param name="iniFile">INI文件</param> /// <param name="section">节点,如果不存在此节点,则创建此节点</param> /// <param name="items">键值对,多个用\0分隔,形如key1=value1\0key2=value2</param> /// <returns></returns> public static bool INIWriteItems(string iniFile, string section, string items) { if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } if (string.IsNullOrEmpty(items)) { throw new ArgumentException("必须指定键值对", "items"); } return INIOperationClass.WritePrivateProfileSection(section, items, iniFile); } /// <summary> /// 在INI文件中,指定节点写入指定的键及值。如果已经存在,则替换。如果没有则创建。 /// </summary> /// <param name="iniFile">INI文件</param> /// <param name="section">节点</param> /// <param name="key">键</param> /// <param name="value">值</param> /// <returns>操作是否成功</returns> public static bool INIWriteValue(string iniFile, string section, string key, string value) { if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } if (string.IsNullOrEmpty(key)) { throw new ArgumentException("必须指定键名称", "key"); } if (value == null) { throw new ArgumentException("值不能为null", "value"); } return INIOperationClass.WritePrivateProfileString(section, key, value, iniFile); } /// <summary> /// 在INI文件中,删除指定节点中的指定的键。 /// </summary> /// <param name="iniFile">INI文件</param> /// <param name="section">节点</param> /// <param name="key">键</param> /// <returns>操作是否成功</returns> public static bool INIDeleteKey(string iniFile, string section, string key) { if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } if (string.IsNullOrEmpty(key)) { throw new ArgumentException("必须指定键名称", "key"); } return INIOperationClass.WritePrivateProfileString(section, key, null, iniFile); } /// <summary> /// 在INI文件中,删除指定的节点。 /// </summary> /// <param name="iniFile">INI文件</param> /// <param name="section">节点</param> /// <returns>操作是否成功</returns> public static bool INIDeleteSection(string iniFile, string section) { if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } return INIOperationClass.WritePrivateProfileString(section, null, null, iniFile); } /// <summary> /// 在INI文件中,删除指定节点中的所有内容。 /// </summary> /// <param name="iniFile">INI文件</param> /// <param name="section">节点</param> /// <returns>操作是否成功</returns> public static bool INIEmptySection(string iniFile, string section) { if (string.IsNullOrEmpty(section)) { throw new ArgumentException("必须指定节点名称", "section"); } return INIOperationClass.WritePrivateProfileSection(section, string.Empty, iniFile); } private void TestIniINIOperation() { string file = "F:\\TestIni.ini"; //写入/更新键值 INIWriteValue(file, "Desktop", "Color", "Red"); INIWriteValue(file, "Desktop", "Width", "3270"); INIWriteValue(file, "Toolbar", "Items", "Save,Delete,Open"); INIWriteValue(file, "Toolbar", "Dock", "True"); //写入一批键值 INIWriteItems(file, "Menu", "File=文件\0View=视图\0Edit=编辑"); //获取文件中所有的节点 string[] sections = INIGetAllSectionNames(file); //获取指定节点中的所有项 string[] items = INIGetAllItems(file, "Menu"); //获取指定节点中所有的键 string[] keys = INIGetAllItemKeys(file, "Menu"); //获取指定KEY的值 string value = INIGetStringValue(file, "Desktop", "color", null); //删除指定的KEY INIDeleteKey(file, "desktop", "color"); //删除指定的节点 INIDeleteSection(file, "desktop"); //清空指定的节点 INIEmptySection(file, "toolbar"); } #endregion #endregion }
来自:http://blog.csdn.net/yysyangyangyangshan/article/details/7017523