C # callXBFLibrary-2 (call an unmanaged DLL) for Migration)

We need to use API functions to read INI files.

1. Create a P/Invoke application class

Find the Win32 API defined in C # In pinvoke.net.

API for reading INI files: GetPrivateProfileString <喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> VcD4KPHA + PHByZSBjbGFzcz0 = "brush: java;"> [DllImport ("kernel32.dll", CharSet = CharSet. unicode)] static extern uint GetPrivateProfileString (string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, uint nSize, string lpFileName );Note: The DllImport attribute comes from using System. Runtime. InteropServices;

(1) lpAppName

Section name

(2) lpKeyName

Key name

(3) lpDefault

Default Value

(4) lpReturnedString

Return Value

(5) nSize

Return Value Length

(6) lpFileName

Name of the file to be read

Create a public method for the program to use.

        public string readIniFileVal(string iniFileName, string section, string key)        {            StringBuilder retStrBuilder = new StringBuilder(256);            GetPrivateProfileString(                section,                 key,                 "",                 retStrBuilder,                 256,                 iniFileName);            return retStrBuilder.ToString();        }

Cwin32API. cs

using System;using System.Collections.Generic;using System.Text;using System.Runtime.InteropServices;namespace callXBFLibrary{    class Cwin32API    {        [DllImport("kernel32.dll", CharSet = CharSet.Unicode)]        private static extern uint GetPrivateProfileString(           string lpAppName,           string lpKeyName,           string lpDefault,           StringBuilder lpReturnedString,           uint nSize,           string lpFileName);        public string readIniFileVal(string iniFileName, string section, string key)        {            StringBuilder retStrBuilder = new StringBuilder(256);            GetPrivateProfileString(                section,                 key,                 "",                 retStrBuilder,                 256,                 iniFileName);            return retStrBuilder.ToString();        }    }    }