C# 操纵配置文件 App.config的详解【C#.Net教程】,C# ，配置文件，App.config

C# 操纵设置文件 App.config的详解

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;

namespace Schwann.CommLibrary
{
    public class ConfigHelper
    {
        /// <summary>
        /// 依据键值猎取设置文件
        /// </summary>
        /// <param name="key">键值</param>
        /// <returns></returns>
        public static string GetConfig(string key)
        {
            string val = string.Empty;
            if (ConfigurationManager.AppSettings.AllKeys.Contains(key))
                val = ConfigurationManager.AppSettings[key];
            return val;
        }

        /// <summary>
        /// 猎取一切设置文件
        /// </summary>
        /// <returns></returns>
        public static Dictionary<string, string> GetConfig()
        {
            Dictionary<string, string> dict = new Dictionary<string, string>();
            foreach (string key in ConfigurationManager.AppSettings.AllKeys)
                dict.Add(key, ConfigurationManager.AppSettings[key]);
            return dict;
        }

        /// <summary>
        /// 依据键值猎取设置文件
        /// </summary>
        /// <param name="key">键值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns></returns>
        public static string GetConfig(string key, string defaultValue)
        {
            string val = defaultValue;
            if (ConfigurationManager.AppSettings.AllKeys.Contains(key))
                val = ConfigurationManager.AppSettings[key];
            if (val == null)
                val = defaultValue;
            return val;
        }

        /// <summary>
        /// 写设置文件,假如节点不存在则自动建立
        /// </summary>
        /// <param name="key">键值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        public static bool SetConfig(string key, string value)
        {
            try
            {
                Configuration conf = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                if (!conf.AppSettings.Settings.AllKeys.Contains(key))
                    conf.AppSettings.Settings.Add(key, value);
                else
                    conf.AppSettings.Settings[key].Value = value;
                conf.Save();
                return true;
            }
            catch { return false; }
        }

        /// <summary>
        /// 写设置文件(用键值建立),假如节点不存在则自动建立
        /// </summary>
        /// <param name="dict">键值鸠合</param>
        /// <returns></returns>
        public static bool SetConfig(Dictionary<string, string> dict)
        {
            try
            {
                if (dict == null || dict.Count == 0)
                    return false;
                Configuration conf = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                foreach (string key in dict.Keys)
                {
                    if (!conf.AppSettings.Settings.AllKeys.Contains(key))
                        conf.AppSettings.Settings.Add(key, dict[key]);
                    else
                        conf.AppSettings.Settings[key].Value = dict[key];
                }
                conf.Save();
                return true;
            }
            catch { return false; }
        }
    }
}

上一篇进修了设置文件读取的处理方式，然则没有对常常用到的 <appSettings>举行进修，实在这些参数的读取要简朴很多：
假设有以下设置参数

 <appSettings>
    <add key="address" value="China"/>
  </appSettings>

读取：

string address=System.Configuration.ConfigurationManager.AppSettings["address"].ToString();

现实就是这么简朴

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