ConfigurationManager.GetSection()方法的使用
GetSection方法读取的是configSections节点,这个节点在web.config配置文件中,它比较特殊,必须放 置于首节点,也就是说,在它之前不能有其它类型的节点。configSections子节点有section和sectionGroup,后者是前者的集 合节点:
<configSections>
<section name="CustomConfig" type="OrderMvc.CustomConfig, OrderMvc"/>
</configSections>
web.config关于CustomConfig的定义:
<CustomConfig>
<Name Value="asdf"/>
</CustomConfig>
下面说说它的作用,通过对ConfigurationManager.GetSection(...)方法的调用,如果某个类继承IConfigurationSectionHandler接口,那么会触发此接口的Create方法,这样我们就可以做一些事了。
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Configuration; using System.Xml; namespace OrderMvc { public class CustomConfig : IConfigurationSectionHandler { public string Name { get; private set; } public object Create(object parent, object configContext, XmlNode section) { CustomConfig config = new CustomConfig(); var name = section.SelectSingleNode("Name"); if (name != null && name.Attributes != null) { var attribute = name.Attributes["Value"]; if (attribute != null) config.Name = attribute.Value; } return config; } } }
调用:
var config = ConfigurationManager.GetSection("CustomConfig") as CustomConfig;
Debug.WriteLine(config.Name);