配置文件时开发当中常用到，使用它不仅能增加程序的灵活性，而且易于维护。项目当中经常使用配置文件来配置Quartz.NET任务调度框架cron表达式，于是就封装了一个帮助类，现在分享出来希望对大家有帮助。
首先场景还是用Quartz.NET执行定期任务，cron表达式放在配置文件中。配置文件内容如下：
<configuration>
<configSections>
<section name="JobInfo" type="System.Configuration.DictionarySectionHandler" />
</configSections>
<JobInfo>
<!--cron表达式-http://www.cronmaker.com/-->
<add key="ChangeStatusJobInfo" value="0 0 0 1/1 * ? *" />
</JobInfo>
</configuration>
上面先定义了一个name为JobInfo的Section。然后在JobInfo节点里存放”ChangStatusJobInfo”这个任务的执行时间，值用cron来表示。它会在每天的00:00:00执行。
下面是Helper实现代码。采用单例模式创建Helper，使用强类型的形式进行配置内容的读写。
/*******************************************************************
* FileName: ConfigHelper.cs
* Author : Qiang Kong
* Date : 2015-11-10 14:54:39
* Desc :
*
* 强类型操作配置文件
* *******************************************************************/
using System;
using System.Configuration;
using System.IO;
using System.Reflection;
using System.Xml;
namespace SendCloudSDK.Utis
{
internal class ConfigHelper
{
private const string ValFlag = "value";
private const string Epilogue = ">";
private static ConfigHelper _instance;
public static bool CreateImpl(string configPath = null)
{
var instance = GetInstance(configPath);
return instance != null;
}
public static ConfigHelper GetInstance()
{
return GetInstance(null);
}
public static ConfigHelper GetInstance(string configPath)
{
return _instance ?? (_instance = new ConfigHelper(configPath));
}
private readonly ExeConfigurationFileMap _exeConfigMap;
private ConfigHelper(string configPath)
{
if (string.IsNullOrWhiteSpace(configPath))
{
configPath = String.Format("{0}\{1}", AppDomain.CurrentDomain.BaseDirectory.TrimEnd('/', '\'), "SendCloud.config");
if (!File.Exists(configPath))
{
string[] filePaths = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory, "配置文件名称.config", SearchOption.AllDirectories);
if (filePaths.Length == 0)
{
throw new Exception("未找到配置文件");
}
configPath = filePaths[0];
}
}
_exeConfigMap = new ExeConfigurationFileMap { ExeConfigFilename = configPath };
}
public T GetSection<T>(string sectionName) where T : class,new()
{
return GetSection<T>(sectionName, null);
}
public T GetSection<T>(string sectionName, string sectionGroup) where T : class, new()
{
T result = new T();
var section = GetSection(sectionName, sectionGroup);
if (section != null)
{
Type t = typeof(T);
foreach (KeyValueConfigurationElement kv in section)
{
t.GetProperty(kv.Key).SetValue(result, kv.Value, null);
}
}
return result;
}
public void ModifySection<T>(string sectionName, T entity) where T : class, new()
{
ModifySection<T>(sectionName, null, entity);
}
public void ModifySection<T>(string sectionName, string sectionGroupName, T entity) where T : class,new()
{
try
{
var configuration = ConfigurationManager.OpenMappedExeConfiguration(_exeConfigMap, ConfigurationUserLevel.None);
ConfigurationSection section;
if (string.IsNullOrWhiteSpace(sectionGroupName))
{
section = configuration.GetSection(sectionName);
}
else
{
var group = configuration.GetSectionGroup(sectionGroupName);
if (group == null)
{
throw new Exception("SectionGroup为空");
}
section = group.Sections[sectionName];
}
if (section != null)
{
var info = section.SectionInformation;
var dicAssemblyName = typeof(DictionarySectionHandler).FullName;
if (!info.Type.Contains(dicAssemblyName))
{
throw new Exception("暂时支持DictionarySectionHandler的节点");
}
var xmlStr = info.GetRawXml();
Type st = entity.GetType();
PropertyInfo[] spis = st.GetProperties();
int curIndex = 0;
foreach (var item in spis)
{
var key = item.Name;
curIndex = xmlStr.IndexOf(string.Format("key="{0}"", key), curIndex, StringComparison.Ordinal);
if (curIndex != -1)
{
var normalStr = item.GetValue(entity, null)
.ToString()
.Replace("<", "<")
.Replace("&", "&")
.Replace(">", ">").Replace("'", "'").Replace(""", """);
var tagStr = string.Format("key="{0}" {3}="{1}" /{2}", key, normalStr, Epilogue, ValFlag);
int endIndex = xmlStr.IndexOf(Epilogue, curIndex, StringComparison.Ordinal);
var ss = xmlStr.Substring(curIndex, endIndex - curIndex + 1);
xmlStr = xmlStr.Replace(ss, tagStr);
curIndex = endIndex;
}
else
{
curIndex = 0;
}
}
info.SetRawXml(xmlStr);
info.Type = dicAssemblyName;
configuration.Save(ConfigurationSaveMode.Modified);
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public string GetVal(string key, string sectionName)
{
string result = string.Empty;
var kvc = GetSection(sectionName);
foreach (KeyValueConfigurationElement kv in kvc)
{
if (key.Equals(kv.Key))
{
result = kv.Value;
break;
}
}
return result;
}
public string SetVal(string key, string val, string sectionName)
{
return "";
}
private KeyValueConfigurationCollection GetSection(string sectionName, string sectionGroupName = null)
{
var result = new KeyValueConfigurationCollection();
if (string.IsNullOrEmpty(sectionName))
{
return result;
}
var configuration = ConfigurationManager.OpenMappedExeConfiguration(_exeConfigMap,
ConfigurationUserLevel.None);
ConfigurationSection section;
if (string.IsNullOrWhiteSpace(sectionGroupName))
{
section = configuration.GetSection(sectionName);
}
else
{
var group = configuration.GetSectionGroup(sectionGroupName);
if (group == null)
{
throw new Exception("sectionGroup为空");
}
section = group.Sections[sectionName];
}
if (section != null)
{
ConfigXmlDocument vv = new ConfigXmlDocument();
vv.LoadXml(section.SectionInformation.GetRawXml());
var items = vv.GetElementsByTagName("add");
XmlAttributeCollection attributes;
foreach (XmlNode item in items)
{
attributes = item.Attributes;
if (attributes != null && attributes.Count == 2)
{
result.Add(attributes["key"].Value, attributes["value"].Value);
}
}
}
return result;
}
private string GetSectionXml(string sectionName)
{
string xmlStr = string.Empty;
var configuration = ConfigurationManager.OpenMappedExeConfiguration(_exeConfigMap, ConfigurationUserLevel.None);
var section = configuration.GetSection(sectionName);
if (section != null)
{
xmlStr = section.SectionInformation.GetRawXml();
}
return xmlStr;
}
}
}
使用方式：
//1、创建一个JobInfo类
class JobInfo
{
public string ChangeStatusJobInfo { get; set; }
}
class Program
{
static void Main(string[] args)
{
//2、预初始化ConfigHelper
ConfigHelper.CreateImpl();
//3、调用
var jobInfo = ConfigHelper.GetInstance().GetSection<JobInfo>("JobInfo>");
string cron = jobInfo.ChangeStatusJobInfo;
}
}