GetPrivateProfileString最长读取65535个字符;
如果ini文件的Value值超过65535,GetPrivateProfileString读取会发生一些无法预料的错误;
WritePrivateProfileString理论上最长写入65535个字符,实际这个写入长度限制会有波动,尚不确定原因,建议不要太长;
1、调用WritePrivateProfileString写入超过65535长度,GetPrivateProfileString读取失败且不会返回默认值;
2、调用WritePrivateProfileString写入超过65535长度后手动修改ini文件,GetPrivateProfileString读取会发生一些无法预料的错误;
补充一:
写入65535个字符,GetPrivateProfileString成功读取65535个字符,返回值为65535;
写入65536个字符,GetPrivateProfileString读取失败,返回值为0;
写入65537个字符,GetPrivateProfileString读取失败,返回值为1;
扩展:
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public class IniParser { private Hashtable keyPairs = new Hashtable(); private String iniFilePath; private struct SectionPair { public String Section; public String Key; } /// <summary> /// Opens the INI file at the given path and enumerates the values in the IniParser. /// </summary> /// <param name="iniPath">Full path to INI file.</param> public IniParser(String iniPath) { TextReader iniFile = null; String strLine = null; String currentRoot = null; String[] keyPair = null; iniFilePath = iniPath; if (File.Exists(iniPath)) { try { iniFile = new StreamReader(iniPath, Encoding.GetEncoding("GB2312")); strLine = iniFile.ReadLine(); while (strLine != null) { strLine = strLine.Trim(); //.ToUpper(); if (strLine != "") { if (strLine.StartsWith("[") && strLine.EndsWith("]")) { currentRoot = strLine.Substring(1, strLine.Length - 2); } else { keyPair = strLine.Split(new char[] { '=' }, 2); SectionPair sectionPair; String value = null; if (currentRoot == null) currentRoot = "ROOT"; sectionPair.Section = currentRoot; sectionPair.Key = keyPair[0]; if (keyPair.Length > 1) value = keyPair[1]; keyPairs.Add(sectionPair, value); } } strLine = iniFile.ReadLine(); } } catch (Exception ex) { throw ex; } finally { if (iniFile != null) iniFile.Close(); } } else throw new FileNotFoundException("Unable to locate " + iniPath); } /// <summary> /// Returns the value for the given section, key pair. /// </summary> /// <param name="sectionName">Section name.</param> /// <param name="settingName">Key name.</param> public String GetSetting(String sectionName, String settingName) { SectionPair sectionPair; sectionPair.Section = sectionName; //.ToUpper(); sectionPair.Key = settingName; //.ToUpper(); var str = ((String)keyPairs[sectionPair]); return str!=null&&str.StartsWith("\"")?str.Substring(1,str.Length-2):str; } /// <summary> /// Enumerates all lines for given section. /// </summary> /// <param name="sectionName">Section to enum.</param> public String[] EnumSection(String sectionName) { ArrayList tmpArray = new ArrayList(); foreach (SectionPair pair in keyPairs.Keys) { if (pair.Section == sectionName) //.ToUpper()) tmpArray.Add(pair.Key); } return (String[])tmpArray.ToArray(typeof(String)); } /// <summary> /// Adds or replaces a setting to the table to be saved. /// </summary> /// <param name="sectionName">Section to add under.</param> /// <param name="settingName">Key name to add.</param> /// <param name="settingValue">Value of key.</param> public void AddSetting(String sectionName, String settingName, String settingValue) { SectionPair sectionPair; sectionPair.Section = sectionName; //.ToUpper(); sectionPair.Key = settingName; //.ToUpper(); if (keyPairs.ContainsKey(sectionPair)) keyPairs.Remove(sectionPair); keyPairs.Add(sectionPair, settingValue); } /// <summary> /// Adds or replaces a setting to the table to be saved with a null value. /// </summary> /// <param name="sectionName">Section to add under.</param> /// <param name="settingName">Key name to add.</param> public void AddSetting(String sectionName, String settingName) { AddSetting(sectionName, settingName, null); } /// <summary> /// Remove a setting. /// </summary> /// <param name="sectionName">Section to add under.</param> /// <param name="settingName">Key name to add.</param> public void DeleteSetting(String sectionName, String settingName) { SectionPair sectionPair; sectionPair.Section = sectionName;//.ToUpper(); sectionPair.Key = settingName;//.ToUpper(); if (keyPairs.ContainsKey(sectionPair)) keyPairs.Remove(sectionPair); } /// <summary> /// Save settings to new file. /// </summary> /// <param name="newFilePath">New file path.</param> public void SaveSettings(String newFilePath) { ArrayList sections = new ArrayList(); String tmpValue = ""; String strToSave = ""; foreach (SectionPair sectionPair in keyPairs.Keys) { if (!sections.Contains(sectionPair.Section)) sections.Add(sectionPair.Section); } foreach (String section in sections) { strToSave += ("[" + section + "]\r\n"); foreach (SectionPair sectionPair in keyPairs.Keys) { if (sectionPair.Section == section) { tmpValue = (String)keyPairs[sectionPair]; if (tmpValue != null) tmpValue = "=" + tmpValue; strToSave += (sectionPair.Key + tmpValue + "\r\n"); } } strToSave += "\r\n"; } try { FileStream fs=new FileStream(newFilePath, FileMode.Create); TextWriter tw = new StreamWriter(fs,Encoding.GetEncoding("GB2312")); tw.Write(strToSave); tw.Close(); } catch (Exception ex) { throw ex; } } /// <summary> /// Save settings back to ini file. /// </summary> public void SaveSettings() { SaveSettings(iniFilePath); } }View Code
标签:keyPairs,String,Windows,读写,INI,sectionPair,strLine,null,Section From: https://www.cnblogs.com/cyj0923/p/16876266.html