C ＃ read INI file and key value pair operation

.Net practice -C# How to read 、 write in INI The configuration file

C# Read ini file

sketch

I've been in contact with INI Read and write configuration files , Although a long time ago, Microsoft recommended using the registry instead INI The configuration file , Now in Visual Studio There are also special .Net Profile format , But it still looks like INI Profile pleasing to the eye . in fact .Net Of XML The format configuration file is more powerful , I also recommend You use this type of configuration file to .Net Software development , The reason why I use INI The configuration file , Just want to taste fresh and personal habits .

C# It does not provide access INI How to configure files , But we can use WinAPI Provide methods to deal with INI Reading and writing of documents , The code is simple ！ There are a lot of ready-made code on the Internet , Here is just for recording and sorting , Convenient for future use .

INI Configuration file composition

INI Files are text files , It consists of several sections (section) form , Under each bracketed section name , There are several key words (key) And its corresponding value (Value), These keywords (key) Belong to the keyword (key) Section on (section).

[Section]
Key1=Value1
Key2=Value2

Core code

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
 
namespace ToolsLibrary
{
    
    public class IniFile
    {
    
        public string path;             //INI file name  
         
        // The statement says INI Of documents API function 
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
         
        // Statement read INI Of documents API function 
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
 
        // Class constructor , Pass on INI The path and filename of the file 
        public IniFile(string INIPath) 
        {
     
            path = INIPath; 
        } 
 
        // Write INI file 
        public void IniWriteValue(string Section, string Key, string Value)
        {
    
            WritePrivateProfileString(Section, Key, Value, path);
        }
 
        // Read INI file 
        public string IniReadValue(string Section, string Key)
        {
    
            StringBuilder temp = new StringBuilder(255);
            int i = GetPrivateProfileString(Section, Key, "", temp, 255, path);
            return temp.ToString();
        }
      
    } 
}

Usage method

When used later , We only need to instantiate one IniFile object , You can read and write through the methods in this object INI The configuration file .

Read INI Values in the configuration file

IniFile ini = new IniFile("C://config.ini"); 
BucketName = ini.IniReadValue("operatorinformation","bucket");
OperatorName = ini.IniReadValue("operatorinformation", "operatorname");
OperatorPwd = ini.IniReadValue("operatorinformation", "operatorpwd");

Write value to INI In profile

IniFile ini = new IniFile("C://config.ini"); 
ini.IniWriteValue("operatorinformation", "bucket", BucketName);
ini.IniWriteValue("operatorinformation", "operatorname", OperatorName);
ini.IniWriteValue("operatorinformation", "operatorpwd", OperatorPwd);

C# Key value pair operation

using System;
using System.Collections.Generic;
namespace _09 Key value pair 
{
    
    class Program
    {
    
        static void Main(string[] args)
        {
    
            //Dictionary
            // Define a set of key value pairs 
            Dictionary<string, string> dictionary = new Dictionary<string, string>();
            // Add key value pair data , The key must be unique , The value is repeatable 
            dictionary.Add("1", " Zhang Shan ");
            dictionary.Add("2", " Li Si ");
            dictionary.Add("3", " Wang Wu ");
            dictionary.Add("4", " bastard ");
            // Reassignment 
            dictionary["3"] = " Shen Jihan ";
 
 
 
            // Determine whether the set contains a key ContainsKey()
            if (!dictionary.ContainsKey("5"))
            {
    
                dictionary.Add("5", " Yang2 guo4 ");// If not, add 
            }
            else
            {
    
                dictionary["5"] = " Yang2 guo4 ";// Include, then change 
            }
 
            Console.WriteLine(dictionary["5"]);
 
            // use foreach
            // Traverse the collection by key 
            foreach (string item in dictionary.Keys)
            {
    
 
                Console.WriteLine(" key --{0}  value --{1}", item, dictionary[item]);
            }
 
            // Traverse the collection through key value pairs 
            foreach (KeyValuePair<string, string> kv in dictionary)
            {
    
                Console.WriteLine(" key --{0}  value --{1}", kv.Key, kv.Value);
            }
 
            Console.ReadKey();
        }
    }
}