C# 读写ini配置文件

小咪咪 2022-08-28 15:52 242阅读 0赞

###                                                       ** C\# 读写ini配置文件** ###

**一、简述**

** 记--c\#通过调用系统api接口进行简单读写ini配置文件。**

例子打包：外链:https://wwa.lanzoui.com/b0c9nm3pa 密码:8maq

**二、效果**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAR2VudmVuX0xpYW5n_size_20_color_FFFFFF_t_70_g_se_x_16][]

**三、工程结构**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAR2VudmVuX0xpYW5n_size_8_color_FFFFFF_t_70_g_se_x_16][]

**四、源代码**

Program.cs文件

using System;
    using System.IO;
    
    namespace Configure
    {
        class Program
        {
            static void Main(string[] args)
            {
                //配置文件路径
                string iniFilePath = Directory.GetCurrentDirectory() + "\\app.ini";
    
                //没有app.ini时读配置，读到的时默认值
                string ip1 = IniConfigHelper.ReadSetting(iniFilePath, "General", "IP", "127.0.0.1");
                Console.WriteLine("ReadSetting ip1:{0}", ip1);
    
                //写配置
                IniConfigHelper.WriteSetting(iniFilePath, "General", "IP", "192.168.10.1");
    
                //再次读配置
                string ip2 = IniConfigHelper.ReadSetting(iniFilePath, "General", "IP", "127.0.0.2");
                Console.WriteLine("ReadSetting ip2:{0}", ip2);
    
                Console.ReadKey();
            }
        }
    }

IniConfigHelper.cs文件

using System.Runtime.InteropServices;
    using System.Text;
    
    namespace Configure
    {
        class IniConfigHelper
        {
            private const int VALUE_MAX_LEN = 1024; //值最大长度
    
            /// <summary>
            /// 写配置到ini文件
            /// </summary>
            /// <param name="appName">节点名</param>
            /// <param name="keyName">要写入的key</param>
            /// <param name="value">要写入的值</param>
            /// <param name="fileName">要写入ini配置文件路径</param>
            /// <returns>成功返回非0，失败返回0</returns>
            [DllImport("kernel32")]
            private static extern long WritePrivateProfileString(string appName, string keyName,
                string value, string fileName);
    
            /// <summary>
            /// 从ini配置文件读配置
            /// </summary>
            /// <param name="appName">节点名</param>
            /// <param name="keyName">目标key</param>
            /// <param name="defaultValue">如果找不到目标key就返回这个默认值</param>
            /// <param name="returnedString">返回目标key对应的值</param>
            /// <param name="size">returnedString的大小</param>
            /// <param name="fileName">要读取的ini配置文件路径</param>
            /// <returns>返回返回字符串的长度</returns>
    
            [DllImport("kernel32")]
            private static extern long GetPrivateProfileString(string appName, string keyName,
                string defaultValue, StringBuilder returnedString, int size, string fileName);
    
            /// <summary>
            /// 外部接口，写配置
            /// </summary>
            /// <param name="iniFilePath">ini配置文件路径</param>
            /// <param name="appName">节点名</param>
            /// <param name="keyName">key</param>
            /// <param name="value">值</param>
            /// <returns>成功返回true，失败返回false</returns>
            public static bool WriteSetting(string iniFilePath, string appName, string keyName, string value)
            {
                return (0 == WritePrivateProfileString(appName, keyName, value, iniFilePath)? false :true);
            }
    
            /// <summary>
            /// 读配置
            /// </summary>
            /// <param name="iniFilePath">ini配置文件路径</param>
            /// <param name="appName">节点名</param>
            /// <param name="keyName">目标key</param>
            /// <param name="defaultValue">默认值</param>
            /// <returns>返回key对应的value</returns>
            public static string ReadSetting(string iniFilePath, string appName, string keyName, string defaultValue)
            {
                StringBuilder result = new StringBuilder(VALUE_MAX_LEN+1);
                GetPrivateProfileString(appName, keyName, defaultValue, result, VALUE_MAX_LEN, iniFilePath);
                return result.ToString();
            }
    
        }
    }

**五、附**

<table style="width:650px;"> 
 <tbody> 
  <tr> 
   <td>功能</td> 
   <td>函数</td> 
   <td style="width:371px;">示例</td> 
  </tr> 
  <tr> 
   <td colspan="1">string转int</td> 
   <td>bool int.TryParse(string s, out Int32 result);</td> 
   <td style="width:371px;"> <p>int num;</p> <p>bool isParseOk = int.TryParse("123", out num);</p> </td> 
  </tr> 
  <tr> 
   <td>int Convert.ToInt32(string value)</td> 
   <td style="width:371px;">int num = Convert.ToInt32("123");</td> 
  </tr> 
  <tr> 
   <td colspan="1">string转double</td> 
   <td>bool double.TryParse(string s, out Double result)</td> 
   <td style="width:371px;"> <p>double num;</p> <p>bool isParseOk = double.TryParse("123.456", out num);</p> </td> 
  </tr> 
  <tr> 
   <td>Convert.ToDouble(string value)</td> 
   <td style="width:371px;">double num = Convert.ToDouble("123.456");</td> 
  </tr> 
  <tr> 
   <td colspan="1">int转string</td> 
   <td>ToString()</td> 
   <td style="width:371px;">int num = 123;<br> string str = num.ToString();</td> 
  </tr> 
  <tr> 
   <td>Convert.ToString(int num);</td> 
   <td style="width:371px;">string str = Convert.ToString(123);</td> 
  </tr> 
  <tr> 
   <td colspan="1">double转string</td> 
   <td>ToString()</td> 
   <td style="width:371px;">double num = 123;<br> string str = num.ToString(num);</td> 
  </tr> 
  <tr> 
   <td>Convert.ToString(double num);</td> 
   <td style="width:371px;">string str = Convert.ToString(123.456);</td> 
  </tr> 
 </tbody> 
</table>

详细请看：

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAR2VudmVuX0xpYW5n_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

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