C# 读写app.config文件

使用ConfigurationManager读取app.config的内容。

添加“System.Configuration”

using System;
using System.Configuration;
using System.IO;
using System.Windows.Forms;
namespace KEEN_EYES
{
    /// <summary>
    /// 目录FORM
    /// </summary>
    public partial class Folder_Form
    {

/// <summary>
        /// 构造方法
        /// </summary>
        public Folder_Form()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 得到app.config值
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        private string getKeyValue(string key)
        {
            return ConfigurationManager.AppSettings[key];
        }

/// <summary>
        /// 设置app.config值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        private void setKeyValue(string key, string value)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            AppSettingsSection app = config.AppSettings;
            app.Settings[key].Value = value;
            config.Save(ConfigurationSaveMode.Modified);
        }
    }
}