lew*_*wis 6 .net c# xml app-config
我正在从'App.config'中读取设置.我只是想出了如何使用ConfigurationSection,ConfigurationElementCollection和ConfigurationelElement.
App.config中:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="notificationSettingsGroup">
<section name="mailTemplates" type="Project.Lib.Configuration.MailTemplateSection, Project.Lib"
allowDefinition="Everywhere" allowExeDefinition="MachineToApplication" requirePermission="false"/>
</sectionGroup>
</configSections>
<notificationSettingsGroup>
<mailTemplates>
<items>
<mailTemplate name="actionChain" subject="Subject bla-bla">
<body>Body bla-bla</body>
</mailTemplate>
</items>
</mailTemplates>
</notificationSettingsGroup>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
</configuration>
我的C#代码:
public class MailTemplateSection : ConfigurationSection
{
[ConfigurationProperty("items", IsDefaultCollection = false)]
public MailTemplateCollection MailTemplates
{
get { return (MailTemplateCollection)this["items"]; }
set { this["items"] = value; }
}
}
[ConfigurationCollection(typeof(MailTemplateElement), AddItemName = "mailTemplate",
CollectionType = ConfigurationElementCollectionType.AddRemoveClearMap)]
public class MailTemplateCollection : ConfigurationElementCollection
{
protected override ConfigurationElement CreateNewElement()
{
return new MailTemplateElement();
}
protected override object GetElementKey(ConfigurationElement element)
{
return ((MailTemplateElement) element).Name;
}
}
public class MailTemplateElement : ConfigurationElement
{
[ConfigurationProperty("name", DefaultValue = "action", IsKey = true, IsRequired = true)]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("subject", DefaultValue = "Subject", IsKey = false, IsRequired = true)]
public string Subject
{
get { return (string)this["subject"]; }
set { this["subject"] = value; }
}
[ConfigurationProperty("body", DefaultValue = "Body", IsKey = false, IsRequired = true)]
public string Body
{
get { return (string)this["body"]; }
set { this["body"] = value; }
}
}
和工作代码:
class Program
{
static void Main(string[] args)
{
Configuration config =
ConfigurationManager.OpenExeConfiguration(
ConfigurationUserLevel.None);
var mailTemplatesSection =
config.GetSection("notificationSettingsGroup/mailTemplates") as MailTemplateSection;
}
}
当我在xml中将字段声明为属性时,所有工作都有效.但是当我尝试将属性转换为嵌套元素时 - "Property'Body'不是ConfigurationElement"会发生错误.
我究竟做错了什么？
因为您必须创建自定义类型并从 ConfigurationElement 派生它们，才能将它们用作配置文件中的元素。所有简单类型始终写为属性。例如：
public class Body : ConfigurationElement
{
[ConfigurationProperty("value", DefaultValue = "Body", IsKey = true, IsRequired = true)]
public string Value{get;set;}
}
这将允许你写
<body value="some val"/>
在你的配置中。