c# APP.config的读取保存配置问题

Question

public Form1()
{
InitializeComponent();
config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
}
public void AddAppSetting(string key, string value)
{
config.AppSettings.Settings.Add(key, value);
config.Save();
}

    /// <summary>  
    /// //修改键值  
    /// </summary>  
    /// <param name="key"></param>  
    /// <param name="value"></param>  
    public void SaveAppSetting(string key, string value)
    {
        config.AppSettings.Settings.Remove(key);
        config.AppSettings.Settings.Add(key, value);

        config.Save();
    }

    /// <summary>  
    /// //获得键值  
    /// </summary>  
    /// <param name="key"></param>  
    /// <returns></returns>  
    public void GetAppSetting()
    {
        //return config.AppSettings.Settings[key].Value;
        String str = ConfigurationManager.AppSettings["Text1"];
        Console.WriteLine(str);
        textBox1.Text = str;
    }

    /// <summary>  
    /// //移除键值  
    /// </summary>  
    /// <param name="key"></param>  
    public void DelAppSetting(string key)
    {
        config.AppSettings.Settings.Remove(key);
        config.Save();
    }

    public void initdata()
    {
        string nb1 = "Text1";

    }



    public ArrayList GetXmlElements(string strElem)
    {
        ArrayList list = new ArrayList();
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(System.Windows.Forms.Application.ExecutablePath + ".config");
        XmlNodeList listNode = xmlDoc.SelectNodes(strElem);
        foreach (XmlElement el in listNode)
        {
            list.Add(el.InnerText);
        }
        return list;
    }
    private void Form1_Load(object sender, EventArgs e)
    {

    }

    private void button2_Click(object sender, EventArgs e)
    {
        AddAppSetting("waeawe","1");
    }

    private void button1_Click(object sender, EventArgs e)
    {
        GetAppSetting();
    }

    private void button3_Click(object sender, EventArgs e)
    {
        SaveAppSetting("Text1", "46546");
    }

代码中button1读取配置。button修改配置，第一次点击Button1的时候可以正常读取配置，点击button2以后修改值。再点button1不能读取修改后的值，只能读取修改之前的值。程序关闭以后才能读取为什么？

Answer 1

在读取前请先使用：

 ConfigurationManager.RefreshSection("appSettings");

刷新值，该函数具体用法请参考：

https://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.refreshsection(v=vs.110).aspx

如果对您有帮助，请点击采纳答案好吗，谢谢~~