C#读写配置文件的代码

妖狐艹你老母 2021-09-21 11:40 325阅读 0赞

FileIni.cs

using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace First_Demo
    {
        class FileIni
        {
    
            private static String WriteText(String FilePath, string data)
            {
                //String FilePath = GetDirectory() + "\\" + "MyFileSend" + GetDate() + ".txt";
    
                System.IO.StreamWriter file = new System.IO.StreamWriter(FilePath, false); //文件覆盖方式添加内容
    
                file.Write(data); //保存数据到文件
    
                file.Close();  //关闭文件
    
                file.Dispose(); //释放对象
    
                return FilePath;
            }
    
            /// <summary>
            /// 获取文件中的数据
            /// </summary>
            /// <param name="args"></param>
            private static List<string> ReadTextToList(String filePath)
            {
                List<string> strData = new List<string>();
                try
                {
                    string line;
                    // using语句。
                    // 定义一个范围，在范围结束时处理对象。 
                    // 场景： 
                    // 当在某个代码段中使用了类的实例，而希望无论因为什么原因，只要离开了这个代码段就自动调用这个类实例的Dispose。 
                    // 要达到这样的目的，用try...catch来捕捉异常也是可以的，但用using也很方便。
    
                    // 创建一个 StreamReader 的实例来读取文件 ,using 语句也能关闭 StreamReader
                    using (System.IO.StreamReader sr = new System.IO.StreamReader(filePath))
                    {
                        // 从文件读取并显示行，直到文件的末尾 
                        while ((line = sr.ReadLine()) != null)
                        {
                            Console.WriteLine(line);
                            strData.Add(line);//strData = line;
                        }
                    }
                }
                catch (Exception e)
                {
                    // 向用户显示出错消息
                    Console.WriteLine("The file could not be read:");
                    Console.WriteLine(e.Message);
                }
                return strData;
            }
    
    
            public class LineStruct
            {
                public string Left;
                public string Right;
            }
    
            static private bool IsSpaceOrTabChar(char ch)
            {
                if (ch == ' ' || ch == 0x09)return true;
                return false;
            }
    
            static private bool IsNameChar(char ch)
            {
                if (ch >= '0' && ch <= '9' )return true;
                else if (ch >= 'a' && ch <= 'z' )return true;
                else if (ch >= 'A' && ch <= 'Z' )return true;
                else if (ch == '_')return true;
                else if (ch == '-')return true;
                return false;
            }
    
            private static LineStruct AnalyseOneLine(string strin)
            {
                LineStruct ret = new LineStruct();
                int State = 0;
                for (int j = 0; j < strin.Length; j++)
                {
                    char ch = strin[j];//strin.ElementAt(j);
                    switch (State)
                    {
                        case 0: // 一开始的空白
                            if (IsSpaceOrTabChar(ch)) { }
                            else if (IsNameChar(ch)) { ret.Left += ch; State++; }
                            else return ret;
                            break;
                        case 1: // 读左值中
                            if (IsNameChar(ch)) { ret.Left += ch; }
                            else if (ch == ':') { State += 2; }
                            else if (IsSpaceOrTabChar(ch)) { State++; }
                            else return ret;
                            break;
                        case 2: // 冒号前的空白
                            if (ch == ':') { State ++; }
                            else if (IsSpaceOrTabChar(ch)) {}
                            else return ret;
                            break;
                        case 3: // 冒号后的空白
                            if (IsSpaceOrTabChar(ch)) { State++; }
                            else if (IsNameChar(ch)) { ret.Right += ch; }
                            else return ret;
                            break;
                        case 4: // 读右值中
                            if (IsNameChar(ch)) { ret.Right += ch; }
                            else { return ret;}
                            break;
                        default: break;
                    }
                }
                return ret;
            }
    
            static bool IsReadAll = false;
            static string ConfigFileName = "Config.ini";
            static Dictionary<string, string> ConfigBuf = new Dictionary<string, string>();
            private static void ReadAllConfig()
            {
                List<string> listdata = ReadTextToList(ConfigFileName);
                for (int i = 0; i < listdata.Count; i++)
                {
                    string strTmp = listdata.ElementAt(i);
    
                    LineStruct eleTmp = AnalyseOneLine(strTmp);
    
                    ConfigBuf.Add(eleTmp.Left, eleTmp.Right);
    
                }
                IsReadAll = true;
            }
    
            public static string ReadConfig(String Key)
            {
                if (IsReadAll == false) ReadAllConfig();
    
                string data = "";
                bool res = ConfigBuf.TryGetValue(Key, out data);
                return data;
            }
    
            private static string Dictionary_to_string(Dictionary<string, string> dic)
            {
                if (IsReadAll == false) ReadAllConfig();
    
                string ret = "";
                for (int i = 0; i < dic.Count; i++ )
                {
                    string tmp = dic.ElementAt(i).Key.ToString() + ":" + dic.ElementAt(i).Value.ToString();
                    ret = ret + tmp + "\r\n";
                }
                
                return ret;
            }
    
            public static void WriteConfig(string Key, string data)
            {
                if (ConfigBuf.ContainsKey(Key) == false) ConfigBuf.Add(Key, data);
                else ConfigBuf[Key] = data;
                WriteText(ConfigFileName, Dictionary_to_string(ConfigBuf));
            }
    
        }
    }