我不能写入配置文件 [英] I can't write into config file

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问题描述

我使用这个类写入配置文件。代码builted和应用程序启动,但每次我检查的app.config我没有看到任何东西里面写。



这可能是什么问题?



下面是代码:

 公共类ConfigSettings 
{
私人ConfigSettings(){}

公共静态字符串ReadSetting(字符串键)
{
返回ConfigurationManager.AppSettings [关键]
}

公共静态无效WriteSetting(字符串键,字符串值)当前装配
XmlDocument的DOC
{
//加载配置文件= loadConfigDocument( );

//检索的appSettings节点
XmlNode的节点= doc.SelectSingleNode(//的appSettings);

如果(节点== NULL)
抛出新的InvalidOperationException异常(的appSettings部分配置文件未找到。);


{
//选择包含关键
的XmlElement ELEM =(XmlElement的)node.SelectSingleNode(的String.format的添加元素(/ /添加[@key ='{0}]键));

如果(ELEM!= NULL)
{
//关键
elem.SetAttribute(价值,价值)增加价值;
}
,否则
{
//关键是没有找到这样创建的添加元素
//并设置它的键/值属性
ELEM = doc.CreateElement(加);
elem.SetAttribute(密钥,密钥);
elem.SetAttribute(价值,价值);
node.AppendChild(ELEM);
}
doc.Save(getConfigFilePath());
}

{
扔;
}
}

公共静态无效RemoveSetting(字符串键)当前装配
XmlDocument的DOC
{
//加载配置文件= loadConfigDocument();

//检索的appSettings节点
XmlNode的节点= doc.SelectSingleNode(//的appSettings);


{
如果(节点== NULL)
抛出新的InvalidOperationException异常(在配置文件中未发现的appSettings部分。);
,否则
{
//删除'添加'元素与coresponding键
node.RemoveChild(node.SelectSingleNode(的String.Format(//添加[@key ='{ 0}]键)));
doc.Save(getConfigFilePath());
}
}
赶上(NullReferenceException异常E)
{
抛出新的异常(的String.Format({0}不存在的关键。键) ,E);
}
}

私有静态的XmlDocument loadConfigDocument()
{
XmlDocument的DOC = NULL;

{$ B $(DOC)B =新的XmlDocument();
doc.Load(getConfigFilePath());
返回文档;
}
赶上(System.IO.FileNotFoundException E)
{
抛出新的异常(无配置文件中找到。,E);
}
}

私人静态字符串getConfigFilePath()
{
返回AppDomain.CurrentDomain.GetData(APP_CONFIG_FILE)的ToString()。
}
}



之后,我使用它来写入文件:

  ConfigSettings.WriteSetting(检查,真); 


解决方案

检查YourExeName.config文件,而不是的app.config


I am using this class for writing into config file. Code is builted and app starts, but every time I check app.config I don't see anything written inside.

What could be the problem?

Here is the code:

public class ConfigSettings
    {
        private ConfigSettings() { }

        public static string ReadSetting(string key)
        {
            return ConfigurationManager.AppSettings[key];
        }

        public static void WriteSetting(string key, string value)
        {
            // load config document for current assembly
            XmlDocument doc = loadConfigDocument();

            // retrieve appSettings node
            XmlNode node = doc.SelectSingleNode("//appSettings");

            if (node == null)
                throw new InvalidOperationException("appSettings section not found in config file.");

            try
            {
                // select the 'add' element that contains the key
                XmlElement elem = (XmlElement)node.SelectSingleNode(string.Format("//add[@key='{0}']", key));

                if (elem != null)
                {
                    // add value for key
                    elem.SetAttribute("value", value);
                }
                else
                {
                    // key was not found so create the 'add' element
                    // and set it's key/value attributes
                    elem = doc.CreateElement("add");
                    elem.SetAttribute("key", key);
                    elem.SetAttribute("value", value);
                    node.AppendChild(elem);
                }
                doc.Save(getConfigFilePath());
            }
            catch
            {
                throw;
            }
        }

        public static void RemoveSetting(string key)
        {
            // load config document for current assembly
            XmlDocument doc = loadConfigDocument();

            // retrieve appSettings node
            XmlNode node = doc.SelectSingleNode("//appSettings");

            try
            {
                if (node == null)
                    throw new InvalidOperationException("appSettings section not found in config file.");
                else
                {
                    // remove 'add' element with coresponding key
                    node.RemoveChild(node.SelectSingleNode(string.Format("//add[@key='{0}']", key)));
                    doc.Save(getConfigFilePath());
                }
            }
            catch (NullReferenceException e)
            {
                throw new Exception(string.Format("The key {0} does not exist.", key), e);
            }
        }

        private static XmlDocument loadConfigDocument()
        {
            XmlDocument doc = null;
            try
            {
                doc = new XmlDocument();
                doc.Load(getConfigFilePath());
                return doc;
            }
            catch (System.IO.FileNotFoundException e)
            {
                throw new Exception("No configuration file found.", e);
            }
        }

        private static string getConfigFilePath()
        {
            return AppDomain.CurrentDomain.GetData("APP_CONFIG_FILE").ToString();
        }
    }

After that I use this to write into file:

ConfigSettings.WriteSetting("check", "true");

解决方案

check YourExeName.config file instead of app.config

这篇关于我不能写入配置文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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