c# cfg文件的操作

[lixudong0314]

如题： c# 怎么操作cfg文件怎么复制怎么添加根节点

[pkjijie]

同问 帮顶

[nicholasXXX]

沙发为了每日十分

[qiqishardgel]

帮顶!

[lixudong0314]

自己顶

[problc]

cfg文件跟xml格式没区别吧

[lixudong0314]

怎么做
自己顶

[deknight]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Reflection;


public enum ConfigFileType
{
    WebConfig,
    AppConfig
}

namespace Cms.xml
{
    class xml
    {
        /// <summary>
        /// Summary description for ReadWriteConfig.
        /// </summary>
        public class ReadWriteConfig
        {
            public string docName = String.Empty;
            private XmlNode node = null;
            private int _configType;
            public string message;
            public int ConfigType
            {
                get { return _configType; }
                set { _configType = value; }
            }

            #region GetValue
            public string GetValue(string key)
            {     //读取
                try
                {
                    XmlDocument cfgDoc = new XmlDocument();
                    loadConfigDoc(cfgDoc);
                    // retrieve the appSettings node  
                    node = cfgDoc.SelectSingleNode("//appSettings");
                    if (node == null)
                    {
                        throw new InvalidOperationException("appSettings section not found");
                    }
                    // XPath select setting "add" element that contains this key to remove      
                    XmlElement addElem = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']");
                    if (addElem == null)
                    {
                        message = "此key不存在！";
                        return message;
                    }
                    message = System.Configuration.ConfigurationSettings.AppSettings[key];
                    return message;
                }
                catch
                {
                    message = "操作异常，获取value值失败！";
                    return message;
                }
            }
            #endregion

            #region SetValue
            public string SetValue(string key, string value)
            {    //增加
                XmlDocument cfgDoc = new XmlDocument();
                loadConfigDoc(cfgDoc);
                // retrieve the appSettings node   
                node = cfgDoc.SelectSingleNode("//appSettings");
                if (node == null)
                {
                    throw new InvalidOperationException("appSettings section not found");
                }
                try
                {
                    // XPath select setting "add" element that contains this key       
                    XmlElement addElem = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']");
                    if (addElem != null)
                    {
                        message = "此key已经存在！";
                        return message;
                    }
                    // not found, so we need to add the element, key and value   
                    else
                    {
                        XmlElement entry = cfgDoc.CreateElement("add");
                        entry.SetAttribute("key", key);
                        entry.SetAttribute("value", value);
                        node.AppendChild(entry);
                    }
                    //save it   
                    saveConfigDoc(cfgDoc, docName);
                    message = "添加成功！";
                    return message;
                }
                catch
                {
                    message = "操作异常，添加失败！";
                    return message;
                }
            }

            #endregion

            #region saveConfigDoc
            private void saveConfigDoc(XmlDocument cfgDoc, string cfgDocPath)
            {
                try
                {
                    XmlTextWriter writer = new XmlTextWriter(cfgDocPath, null);
                    writer.Formatting = Formatting.Indented;
                    cfgDoc.WriteTo(writer);
                    writer.Flush();
                    writer.Close();
                    return;
                }
                catch
                {
                    throw;
                }
            }

            #endregion

            #region removeElement
            public string removeElement(string elementKey)
            { // 删除
                try
                {
                    XmlDocument cfgDoc = new XmlDocument();
                    loadConfigDoc(cfgDoc);
                    // retrieve the appSettings node  
                    node = cfgDoc.SelectSingleNode("//appSettings");
                    if (node == null)
                    {

                        throw new InvalidOperationException("appSettings section not found");
                    }

                    XmlElement addElem = (XmlElement)node.SelectSingleNode("//add[@key='" + elementKey + "']");
                    if (addElem == null)
                    {
                        message = "此key不存在！";
                        return message;
                    }
                    // XPath select setting "add" element that contains this key to remove      
                    node.RemoveChild(node.SelectSingleNode("//add[@key='" + elementKey + "']"));
                    saveConfigDoc(cfgDoc, docName);
                    message = "删除成功！";
                    return message;
                }
                catch
                {
                    message = "操作异常，删除失败！";
                    return message;
                }
            }
            #endregion

            #region modifyElement
            public string modifyElement(string elementKey, string elementValue)
            { //修改
                try
                {
                    XmlDocument cfgDoc = new XmlDocument();
                    loadConfigDoc(cfgDoc);
                    // retrieve the appSettings node  
                    node = cfgDoc.SelectSingleNode("//appSettings");
                    if (node == null)
                    {
                        throw new InvalidOperationException("appSettings section not found");
                    }
                    // XPath select setting "add" element that contains this key to remove      
                    XmlElement addElem = (XmlElement)node.SelectSingleNode("//add[@key='" + elementKey + "']");
                    if (addElem == null)
                    {
                        message = "此key不存在！";
                        return message;
                    }

                    addElem.SetAttribute("value", elementValue);
                    //save it   
                    saveConfigDoc(cfgDoc, docName);
                    message = "修改成功！";
                    return message;
                }
                catch
                {
                    message = "操作异常，修改失败！";
                    return message;
                }
            }
            #endregion

            #region loadConfigDoc
            private XmlDocument loadConfigDoc(XmlDocument cfgDoc)
            {
                // load the config file   
                if (Convert.ToInt32(ConfigType) == Convert.ToInt32(ConfigFileType.AppConfig))
                {
                    docName = ((Assembly.GetEntryAssembly()).GetName()).Name;
                    docName += ".exe.config";
                }
                else
                {
                    //docName=HttpContext.Current.Server.MapPath("web.config");
                }
                cfgDoc.Load(docName);
                return cfgDoc;
            }
            #endregion
        }
    }
}

//读
Cms.xml.xml.ReadWriteConfig xml = new xml.ReadWriteConfig();
 xml.ConfigType = (int)ConfigFileType.AppConfig;
 xxx.Text = xml.GetValue("xxx");

//写
Cms.xml.xml.ReadWriteConfig config = new Cms.xml.xml.ReadWriteConfig();
config.ConfigType = (int)ConfigFileType.AppConfig;
config.modifyElement("XXX", xxx.Text.Trim());

[lixudong0314]

自己顶

[-小蕾-]

帮顶，不太明白cfg文件？汗。。。lz能给我说一下什么情况下用它么？