C#学习笔记——读写ini文件
<div id="cnblogs_post_body"><div id="codeSnippetWrapper"> <div style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: &#39;Courier New&#39;, courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px" id="codeSnippet"> 1: using System; 2: using System.Collections.Generic; 3: using System.Linq; 4: using System.Text; 5: //引入命名空间 6: using System.Collections.Specialized; 7: using System.IO; 8: 9: 10: namespace ConfigFiles 11: { 12: /// <summary> 13: /// IniFiles的类 14: /// </summary> 15: public class IniFiles 16: { 17: public string FileName; //INI文件名 18: 19: //声明读写INI文件的API函数 20: &quot;kernel32&quot;)] 21: private static extern bool WritePrivateProfileString(string section, string key, string val, string filePath); 22: &quot;kernel32&quot;)] 23: private static extern int GetPrivateProfileString(string section, string key, string def, byte[] retVal, int size, string filePath); 24: 25: //类的构造函数，传递INI文件名 26: public IniFiles(string AFileName) 27: { 28: // 判断文件是否存在 29: FileInfo fileInfo = new FileInfo(AFileName); 30: 31: //Todo:搞清枚举的用法 32: if ((!fileInfo.Exists)) 33: { //|| (FileAttributes.Directory in fileInfo.Attributes)) 34: //文件不存在，建立文件 35: System.IO.StreamWriter sw = new System.IO.StreamWriter(AFileName, false, System.Text.Encoding.Default); 36: try 37: { 38: sw.Write(&quot;#应用程序配置文件&quot;); 39: sw.Close(); 40: } 41: 42: catch 43: { 44: throw (new ApplicationException(&quot;Ini文件不存在&quot;)); 45: } 46: } 47: 48: //必须是完全路径，不能是相对路径 49: FileName = fileInfo.FullName; 50: } 51: 52: //写INI文件 53: public void WriteString(string Section, string Ident, string Value) 54: { 55: if (!WritePrivateProfileString(Section, Ident, Value, FileName)) 56: { 57: throw (new ApplicationException(&quot;写Ini文件出错&quot;)); 58: } 59: } 60: 61: //读取INI文件指定 62: public string ReadString(string Section, string Ident, string Default) 63: { 64: Byte[] Buffer = new Byte; 65: int bufLen = GetPrivateProfileString(Section, Ident, Default, Buffer, Buffer.GetUpperBound(0), FileName); 66: //必须设定0（系统默认的代码页）的编码方式，否则无法支持中文 67: string s = Encoding.GetEncoding(0).GetString(Buffer); 68: s = s.Substring(0, bufLen); 69: return s.Trim(); 70: } 71: 72: //读整数 73: public int ReadInteger(string Section, string Ident, int Default) 74: { 75: string intStr = ReadString(Section, Ident, Convert.ToString(Default)); 76: try 77: { 78: return Convert.ToInt32(intStr); 79: 80: } 81: catch (Exception ex) 82: { 83: Console.WriteLine(ex.Message); 84: return Default; 85: } 86: } 87: 88: //写整数 89: public void WriteInteger(string Section, string Ident, int Value) 90: { 91: WriteString(Section, Ident, Value.ToString()); 92: } 93: 94: //读布尔 95: public bool ReadBool(string Section, string Ident, bool Default) 96: { 97: try 98: { 99: return Convert.ToBoolean(ReadString(Section, Ident, Convert.ToString(Default))); 100: } 101: catch (Exception ex) 102: { 103: Console.WriteLine(ex.Message); 104: return Default; 105: } 106: } 107: 108: //写Bool 109: public void WriteBool(string Section, string Ident, bool Value) 110: { 111: WriteString(Section, Ident, Convert.ToString(Value)); 112: } 113: 114: //从Ini文件中，将指定的Section名称中的所有Ident添加到列表中 115: public void ReadSection(string Section, StringCollection Idents) 116: { 117: Byte[] Buffer = new Byte; 118: //Idents.Clear(); 119: 120: int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(0), 121: FileName); 122: //对Section进行解析 123: GetStringsFromBuffer(Buffer, bufLen, Idents); 124: } 125: 126: private void GetStringsFromBuffer(Byte[] Buffer, int bufLen, StringCollection Strings) 127: { 128: Strings.Clear(); 129: if (bufLen != 0) 130: { 131: int start = 0; 132: for (int i = 0; i < bufLen; i++) 133: { 134: if ((Buffer == 0) && ((i - start) > 0)) 135: { 136: String s = Encoding.GetEncoding(0).GetString(Buffer, start, i - start); 137: Strings.Add(s); 138: start = i + 1; 139: } 140: } 141: } 142: } 143: 144: //从Ini文件中，读取所有的Sections的名称 145: public void ReadSections(StringCollection SectionList) 146: { 147: //Note:必须得用Bytes来实现，StringBuilder只能取到第一个Section 148: byte[] Buffer = new byte; 149: int bufLen = 0; 150: bufLen = GetPrivateProfileString(null, null, null, Buffer, 151: Buffer.GetUpperBound(0), FileName); 152: GetStringsFromBuffer(Buffer, bufLen, SectionList); 153: } 154: 155: //读取指定的Section的所有Value到列表中 156: public void ReadSectionValues(string Section, NameValueCollection Values) 157: { 158: StringCollection KeyList = new StringCollection(); 159: ReadSection(Section, KeyList); 160: Values.Clear(); 161: foreach (string key in KeyList) 162: { 163: Values.Add(key, ReadString(Section, key, &quot;&quot;)); 164: 165: } 166: } 167: 168: 169: //清除某个Section 170: public void EraseSection(string Section) 171: { 172: // 173: if (!WritePrivateProfileString(Section, null, null, FileName)) 174: { 175: 176: throw (new ApplicationException(&quot;无法清除Ini文件中的Section&quot;)); 177: } 178: } 179: 180: //删除某个Section下的键 181: public void DeleteKey(string Section, string Ident) 182: { 183: WritePrivateProfileString(Section, Ident, null, FileName); 184: } 185: 186: //Note:对于Win9X，来说需要实现UpdateFile方法将缓冲中的数据写入文件 187: //在Win NT, 2000和XP上，都是直接写文件，没有缓冲，所以，无须实现UpdateFile 188: //执行完对Ini文件的修改之后，应该调用本方法更新缓冲区。 189: public void UpdateFile() 190: { 191: WritePrivateProfileString(null, null, null, FileName); 192: } 193: 194: //检查某个Section下的某个键值是否存在 195: public bool ValueExists(string Section, string Ident) 196: { 197: // 198: StringCollection Idents = new StringCollection(); 199: ReadSection(Section, Idents); 200: return Idents.IndexOf(Ident) > -1; 201: } 202: 203: //确保资源的释放 204: ~IniFiles() 205: { 206: UpdateFile(); 207: } 208: } 209: }
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