C#操作ini文件

C#创建ini文件、读取值、修改值

调用方法：

int iBaudRate = InIHelper.ReadConfig<int>("COM_SETUP", "波特率")

InIHelper类：

 1    public class InIHelper
 2     {
 3         private static string FileName = Application.StartupPath + "\\AppConfig.ini";
 4         /// <summary>
 5         /// 读取配置文件
 6         /// </summary>
 7         /// <typeparam name="T"></typeparam>
 8         /// <param name="section"></param>
 9         /// <param name="key"></param>
10         /// <returns></returns>
11         public static T ReadConfig<T>(string section, string key)
12         {
13             if (File.Exists(FileName))
14             {
15                 IniFile f = new IniFile(FileName);
16                 string value = f.ReadContentValue(section, key);
17 
18                 if (String.IsNullOrWhiteSpace(value))
19                     return default(T);
20 
21                 if (typeof(T).IsEnum)
22                     return (T)Enum.Parse(typeof(T), value, true);
23 
24                 return (T)Convert.ChangeType(value, typeof(T));
25             }
26             else
27             {
28                 return default(T);
29             }
30         }
31 
32         /// <summary>
33         /// 写配置文件
34         /// </summary>
35         /// <param name="section"></param>
36         /// <param name="key"></param>
37         /// <param name="value"></param>
38         public static void WriteConfig(string section, string key, string value)
39         {
40             //如果文件不存在，则创建
41             if (!File.Exists(FileName))
42             {
43                 using (FileStream myFs = new FileStream(FileName, FileMode.Create)) { }
44             }
45 
46             IniFile f = new IniFile(FileName);
47             f.WriteContentValue(section, key, value);
48         }
49     }

核心代码：

 public class IniFile
    {
        public string Path;

        public IniFile(string path)
        {
            this.Path = path;
        }

        /// <summary>
        /// 写入INI文件
        /// </summary>
        /// <param name="section">节点名称[如[TypeName]]</param>
        /// <param name="key">键</param>
        /// <param name="val">值</param>
        /// <param name="filepath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filepath);

        /// <summary>
        /// 读取INI文件
        /// </summary>
        /// <param name="section">节点名称</param>
        /// <param name="key">键</param>
        /// <param name="def">值</param>
        /// <param name="retval">stringbulider对象</param>
        /// <param name="size">字节大小</param>
        /// <param name="filePath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retval, int size, string filePath);

        /// <summary>
        /// 写入
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="iValue"></param>
        public void WriteContentValue(string section, string key, string iValue)
        {
            WritePrivateProfileString(section, key, iValue, this.Path);
        }

        /// <summary>
        /// 读取INI文件中的内容方法
        /// </summary>
        /// <param name="Section">键</param>
        /// <param name="key">值</param>
        /// <returns></returns>
        public string ReadContentValue(string Section, string key)
        {
            StringBuilder temp = new StringBuilder(1024);
            GetPrivateProfileString(Section, key, "", temp, 1024, this.Path);
            return temp.ToString();
        }
    }