一:给 C# 类库 dll 添加配置文件并读取配置信息
效果:
1.给类库程序添加配置文件,并命名为:类库名.DLL.config
如上面效果图,类库为:API.dll ,那么其对应的类库配置文件为:API.DLL.config
注意:运行时config文件需跟类库dll在同一级目录下,不然读取不到文件
给配置文件添加相关的配置信息
<?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <!--Start 企业微信接口配置,默认不需要更改,企业微信属于私有化的请修改 Start--> <!--注意:链接必须是以'/'结尾--> <add key="Api" value="https://api.weixin.qq.com/" /> <add key="QyApi" value="https://qyapi.weixin.qq.com/" /> <add key="FileApi" value="http://file.api.weixin.qq.com/" /> <add key="ApiMch" value="https://api.mch.weixin.qq.com/" /> <!--END 企业微信接口配置 END--> </appSettings> </configuration>
2.创建APIConfHelper.cs 类,为读取配置信息封装方法
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; using System.IO; using System.Xml; using System.Reflection; using System.Diagnostics; namespace API.Helpers { /// <summary> /// 支持AppSettings和ConnectionStrings节点 ,如需其他节点请自行扩展 /// </summary> public class APIConfHelper { //实现 AppSettings 节点的读取 public static Hashtable AppSettings { get { return GetNameAndValue("appSettings", "key", "value"); } } /// <summary> /// 实现对AppSettings节点对应key的value设置 /// </summary> /// <param name="keyNameValue"></param> /// <param name="value"></param> public static void SetAppSettings(string keyNameValue, string value) { SetNameAndValue("appSettings", "key", keyNameValue, value); } //实现 ConnectionStrings 节点的读取 public static Hashtable ConnectionStrings { get { return GetNameAndValue("connectionStrings", "name", "connectionString"); } } /// <summary> /// 实现对connectionStrings 节点对应name的value设置 /// </summary> /// <param name="keyNameValue"></param> /// <param name="value"></param> public static void SetConnectionStrings(string keyNameValue, string value) { SetNameAndValue("connectionStrings", "name", keyNameValue, value); } /// <summary> /// 实现对相应节点的对应节点对应key或者name对应value值的设置 /// </summary> /// <param name="sectionTag">对应节点</param> /// <param name="KeyOrName">对应key或者name</param> /// <param name="keyNameValue">key或者name的值</param> /// <param name="valueOrConnectionString">对应key或者name 的value值</param> private static void SetNameAndValue(string sectionTag, string KeyOrName, string keyNameValue, string valueOrConnectionString) { string assemblyPath = Assembly.GetExecutingAssembly().GetName().CodeBase; //获取运行项目当然DLL的路径 assemblyPath = assemblyPath.Remove(0, 8); //去除路径前缀 string configUrl = assemblyPath + ".config"; //添加.config后缀，得到配置文件路径 try { XmlDocument cfgDoc = new XmlDocument(); cfgDoc.Load(configUrl); XmlNodeList nodes = cfgDoc.GetElementsByTagName(sectionTag); foreach (XmlNode node in nodes) { foreach (XmlNode childNode in node.ChildNodes) { XmlAttributeCollection attributes = childNode.Attributes; if (attributes!=null) { if (attributes.GetNamedItem(KeyOrName).InnerText == keyNameValue) { attributes.GetNamedItem("value").InnerText = valueOrConnectionString; } } } } cfgDoc.Save(configUrl); } catch (FileNotFoundException es) { throw es; } } /// <summary> /// 根据节点名，子节点名，获取指定值 /// </summary> /// <param name="sectionTag">对应节点</param> /// <param name="KeyOrName">key或者name</param> /// <param name="valueOrConnectionString">key或者name的值</param> /// <returns>key或者name对应value值</returns> private static Hashtable GetNameAndValue(string sectionTag, string KeyOrName, string valueOrConnectionString) { Hashtable settings = new Hashtable(5);//初始化Hashtable string assemblyPath = Assembly.GetExecutingAssembly().GetName().CodeBase;//获取运行项目当前DLL的路径 assemblyPath = assemblyPath.Remove(0, 8); //去除前缀 string configUrl = assemblyPath + ".config"; //添加 .config 后缀，得到配置文件路径 XmlDocument cfgDoc = new XmlDocument(); FileStream fs = null; try { fs = new FileStream(configUrl, FileMode.Open, FileAccess.Read); cfgDoc.Load(new XmlTextReader(fs)); XmlNodeList nodes = cfgDoc.GetElementsByTagName(sectionTag); foreach (XmlNode node in nodes) { foreach (XmlNode childNode in node.ChildNodes) { XmlAttributeCollection attributes = childNode.Attributes; if (attributes!=null) {
//为null不添加 settings.Add(attributes[KeyOrName].Value, attributes[valueOrConnectionString].Value); } } } } catch (FileNotFoundException es) { throw es; } finally { if (fs != null) { fs.Close(); } } return settings; } } }
3.调用方法读取节点配置信息
/// <summary> /// 基础URL /// </summary> private static string baseUrl = APIConfHelper.AppSettings["Api"].ToString();
