在C#程序里，我想读取App.config里的节点信息，显示在在窗体里

Question

本帖最后由 gidiyis 于 2010-02-03 15:36:52 编辑

Answer 1

你像普通文件那样读写xml不就可以了吗？

Answer 2

不就是读XML，修改XML吗！去查查很多的！具体方法就不发了！

Answer 3

public string GetConfigValue(string path,string appKey)  
{     
  XmlDocument xDoc = new XmlDocument();     
  try
   {
     xDoc.Load(path);     
    //xDoc.Load(System.Windows.Forms.Application.ExecutablePath+".config");
    XmlNode xNode;     
    XmlElement xElem;     
    xNode = xDoc.SelectSingleNode("//appSettings");    
    xElem = (XmlElement)xNode.SelectSingleNode("//add[@key='"+appKey+"']");     
    if(xElem!=null)   
     return xElem.GetAttribute("value");     
    else     
     return   "";
   }
 catch(Exception)
   {
     return "";
   }
} 

Answer 4

 /// <summary>
        /// 修改配置文件
        /// </summary>
        /// <param name="connString"></param>
        public static void UpdateConfig(string p_strKey, string p_strValue)
        {
            try
            {
                string m_strFullPath = "";
                Assembly Asm = Assembly.GetExecutingAssembly();
                XmlDocument xmlDoc = new XmlDocument();                m_strFullPath = Asm.Location.Substring(0, (Asm.Location.LastIndexOf("\\") + 1)) + "YourApplication.exe.config";
                xmlDoc.Load(m_strFullPath);                XmlNodeList nodeList = xmlDoc.SelectSingleNode("/configuration/appSettings").ChildNodes;
                foreach (XmlNode xn in nodeList)//遍历所有子节点
                {
                    XmlElement xe = (XmlElement)xn;                    if (xe.GetAttribute("key").IndexOf(p_strKey) != -1)
                    {
                        xe.SetAttribute("value", p_strValue);
                    }
                }
                xmlDoc.Save(m_strFullPath);
            }
            catch (System.NullReferenceException NullEx)
            {
                throw NullEx;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

Answer 5

        
        /// <summary>
        /// 修改链接字符串
        /// </summary>
        /// <returns></returns>
        private bool UpdateConfig(string path, bool PartnerSystem)
        {
            System.IO.FileInfo FileInfo = new System.IO.FileInfo(dir + path);
            if (!FileInfo.Exists)
            {
                throw new InstallException("Missing config file :" + this.Context.Parameters["targetdir"] + "web.config");
            }
            System.Xml.XmlDocument xmlDocument = new System.Xml.XmlDocument();
            xmlDocument.Load(FileInfo.FullName);
            bool FoundIt = false;
            foreach (System.Xml.XmlNode Node in xmlDocument["configuration"]["connectionStrings"])
            {
                if (Node.Name == "add")
                {
                    if (Node.Attributes.GetNamedItem("name").Value == "Connection")
                    {
                        Node.Attributes.GetNamedItem("connectionString").Value = String.Format("server={0};database={1};uid={2};pwd={3};pooling=true;charset=gbk;", ServerName, DBName, AdminName, AdminPwd);
                        FoundIt = true;
                    }
                }
            }
            if (PartnerSystem)
            {
                foreach (System.Xml.XmlNode Node in xmlDocument["configuration"]["appSettings"])
                {
                    if (Node.Name == "add")
                    {
                        if (Node.Attributes.GetNamedItem("key").Value == "PartnerSystem")
                        {
                            Node.Attributes.GetNamedItem("value").Value = this.Context.Parameters["partner"].ToString();
                            FoundIt = true;
                        }
                    }
                }
            }
            if (!FoundIt)
            {
                throw new InstallException("Error when writing the config file: web.config");
            }
            xmlDocument.Save(FileInfo.FullName);
            return FoundIt;
        }希望对你有帮助

Answer 6

添加app.config Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
config.AppSettings.Settings["abc"].Value = abc;

Answer 7

XmlElement xe = (XmlElement)xn;4楼的 大侠，程序运行到这里报错，错误是：无法将类型为“System.Xml.XmlComment”的对象强制转换为类型“System.Xml.XmlElement”。
我对操作XML文件不怎么会，
我想把config里的每个节点都显示到窗体上相应的文本框里，实现这样的一个功能方法如何实现，还请帮帮忙!

Answer 8

Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath); 
config.AppSettings.Settings["abc"].Value = abc;
或者是用xml

Answer 9

解决了原来是 config里的注释，把注释去掉了都没有问题了