C#读取配置文件中的值_.NET_编程开发_程序员俱乐部

using System;
using System.Windows.Forms;
using System.Xml;

namespace BlackBoxForms.App_Code
{
    /// <summary>
    /// 设置配置文件
    /// </summary>
    public class SetAppConfig
    {
        public static string AppConfig()
        {
            return System.IO.Path.Combine(Application.StartupPath, "BlackBoxForms.exe.config");
        }

        /// <summary>
        /// 根据WCF获取值
        /// </summary>
        /// <param name="appKey">key</param>
        /// <returns>value</returns>
        public static string GetAddress(string appKey)
        {
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(AppConfig());
                XmlNode xNode = xmlDoc.SelectSingleNode("//system.serviceModel//client");
                XmlElement xElem = (XmlElement)xNode.SelectSingleNode("//endpoint[@name='" + appKey + "']");
                if (xElem != null)
                    return xElem.GetAttribute("address");
                else
                    return "";
            }
            catch (Exception)
            {
                return "";
            }
        }

        /// <summary>
        /// 设置WCF服务
        /// </summary>
        /// <param name="appKey">key</param>
        /// <param name="appValue">value</param>
        /// <returns>结果 true:成功，false：失败</returns>
        public static bool SetValueByName(string appKey, string appValue)
        {
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(AppConfig());
                XmlNode xNode = xmlDoc.SelectSingleNode("//system.serviceModel//client");
                XmlElement xElem1 = (XmlElement)xNode.SelectSingleNode("//endpoint[@name='" + appKey + "']");
                if (xElem1 != null)
                {
                    xElem1.SetAttribute("address", appValue);
                }
                else
                {
                    XmlElement xElem2 = xmlDoc.CreateElement("endpoint");
                    xElem2.SetAttribute("name", appKey);
                    xElem2.SetAttribute("address", appValue);
                    xNode.AppendChild(xElem2);
                }
                xmlDoc.Save(AppConfig());
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        /// <summary>
        /// 根据key获取value值
        /// </summary>
        /// <param name="appKey">key</param>
        /// <returns>value</returns>
        public static string GetValue(string appKey)
        {
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(AppConfig());
                XmlNode xNode = xmlDoc.SelectSingleNode("//appSettings");
                XmlElement xElem = (XmlElement)xNode.SelectSingleNode("//add[@key='" + appKey + "']");
                if (xElem != null)
                    return xElem.GetAttribute("value");
                else
                    return "";
            }
            catch (Exception)
            {
                return "";
            }
        }

        /// <summary>
        /// 根据key设置value值
        /// </summary>
        /// <param name="appKey">key</param>
        /// <param name="appValue">value</param>
        /// <returns>结果 true:成功,false:失败</returns>
        public static bool SetValueByKey(string appKey, string appValue)
        {
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(AppConfig());
                XmlNode xNode = xmlDoc.SelectSingleNode("//appSettings");
                XmlElement xElem1 = (XmlElement)xNode.SelectSingleNode("//add[@key='" + appKey + "']");
                if (xElem1 != null)
                {
                    xElem1.SetAttribute("value", appValue);
                }
                else
                {
                    XmlElement xElem2 = xmlDoc.CreateElement("add");
                    xElem2.SetAttribute("key", appKey);
                    xElem2.SetAttribute("value", appValue);
                    xNode.AppendChild(xElem2);
                }
                xmlDoc.Save(AppConfig());
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }
    }
}