c# - 无法在 app.exe.config 中保存设置

Question

我面临一个问题。

我想在 app.config 文件中保存设置

我在配置文件中写了单独的类和定义的部分..

但是当我运行应用程序时。它不会将给定值保存到配置文件中

这里是设置类

public class MySetting:ConfigurationSection
    {
        private static MySetting settings = ConfigurationManager.GetSection("MySetting") as MySetting;

        public override bool IsReadOnly()
        {
            return false;
        }

        public static MySetting Settings
        {
            get
            {
                return settings;
            }
        }


        [ConfigurationProperty("CustomerName")]
        public String CustomerName
        {
            get
            {
                return settings["CustomerName"].ToString();
            }
            set
            {
                settings["CustomerName"] = value;
            }
        }


        [ConfigurationProperty("EmailAddress")]
        public String EmailAddress
        {
            get
            {                
                return settings["EmailAddress"].ToString();
            }
            set
            {
                settings["EmailAddress"] = value;
            }
        }


        public static bool Save()
        {
            try
            {
                System.Configuration.Configuration configFile = Utility.GetConfigFile();
                MySetting mySetting = (MySetting )configFile.Sections["MySetting "];

                if (null != mySetting )
                {
                    mySetting .CustomerName = settings["CustomerName"] as string;
                    mySetting .EmailAddress = settings["EmailAddress"] as string;                    

                    configFile.Save(ConfigurationSaveMode.Full);
                    return true;
                }

                return false;
            }
            catch
            {
                return false;
            }
        }
    }

这是我在配置文件中保存信息的代码

private void SaveCustomerInfoToConfig(String name, String emailAddress)
        {            

            MySetting .Settings.CustomerName = name;
            MySetting .Settings.EmailAddress = emailAddress
            MySetting .Save();
        }

这是app.config

<configuration>
  <configSections>
    <section name="MySettings" type="TestApp.MySettings, TestApp"/>
  </configSections> 

  <MySettings CustomerName="" EmailAddress="" />  
</configuration>

你能告诉我错误在哪里吗..我尝试了很多并从互联网上阅读。但仍然无法在配置文件中保存信息..

我还通过双击 exe 文件来运行应用程序。

Answer 1

根据MSDN: ConfigurationManager.GetSection Method ,

ConfigurationManager.GetSection方法访问运行时配置信息它无法更改。要更改配置，请使用 Configuration.GetSection使用以下打开方法之一获取的配置文件上的方法:

• OpenExeConfiguration

• OpenMachineConfiguration

• OpenMappedExeConfiguration

但是，如果你想更新 app.config 文件，我会把它作为一个 xml 文档来读取，并像一个普通的 xml 文档一样操作它。

请看下面的例子:注意:此示例仅用于概念验证。不应按原样用于生产。

using System;
using System.Linq;
using System.Xml.Linq;

namespace ChangeAppConfig
{
    class Program
    {
        static void Main(string[] args)
        {
            MyConfigSetting.CustomerName = "MyCustomer";
            MyConfigSetting.EmailAddress = "MyCustomer@Company.com";
            MyConfigSetting.TimeStamp = DateTime.Now;
            MyConfigSetting.Save();
        }
    }

    //Note: This is a proof-of-concept sample and 
    //should not be used in production as it is.  
    // For example, this is not thread-safe. 
    public class MyConfigSetting
    {
        private static string _CustomerName;
        public static string CustomerName
        {
            get { return _CustomerName; }
            set
            {
                _CustomerName = value;
            }
        }

        private static string _EmailAddress;
        public static string EmailAddress
        {
            get { return _EmailAddress; }
            set
            {
                _EmailAddress = value;
            }
        }

        private static DateTime _TimeStamp;
        public static DateTime TimeStamp
        {
            get { return _TimeStamp; }
            set
            {
                _TimeStamp = value;
            }
        }

        public static void Save()
        {
            XElement myAppConfigFile = XElement.Load(Utility.GetConfigFileName());
            var mySetting = (from p in myAppConfigFile.Elements("MySettings")
                            select p).FirstOrDefault();
            mySetting.Attribute("CustomerName").Value = CustomerName;
            mySetting.Attribute("EmailAddress").Value = EmailAddress;
            mySetting.Attribute("TimeStamp").Value = TimeStamp.ToString();

            myAppConfigFile.Save(Utility.GetConfigFileName());

        }
    }

    class Utility
    {        
        //Note: This is a proof-of-concept and very naive code. 
        //Shouldn't be used in production as it is. 
        //For example, no null reference checking, no file existence checking and etc. 
        public static string GetConfigFileName()
        {            
            const string STR_Vshostexe = ".vshost.exe";
            string appName = Environment.GetCommandLineArgs()[0];

            //In case this is running under debugger. 
            if (appName.EndsWith(STR_Vshostexe))
            {
                appName = appName.Remove(appName.LastIndexOf(STR_Vshostexe), STR_Vshostexe.Length) + ".exe";
            }

            return appName + ".config";
        }
    }
}

我还在 app.config 中的 MySettings 添加了“TimeStamp”属性，以便轻松检查结果。

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="MySettings" type="TestApp.MySettings, TestApp"/>
  </configSections>

  <MySettings CustomerName="" EmailAddress="" TimeStamp=""/>
</configuration>