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.Net 配置文件——继承ConfigurationSection实现自定

发布时间:2017-09-06 19:37:01

.Net 配置文件——继承ConfigurationSection实现自定义处理类处理自定义配置节点

除了使用继承IConfigurationSectionHandler的方法定义处理自定义节点的类,还可以通过继承ConfigurationSection类实现同样效果。

首先说下.Net配置文件中一个潜规则:

在配置节点时,对于想要进行存储的参数数据,可以采用两种方式:一种是存储到节点的属性中,另一种是存储在节点的文本中。

因为一个节点可以有很多属性,但是只要一个innertext,而要在程序中将这两种形式区分开会带来复杂性。 为了避免这个问题,.net的配置文件只是用属性存储而不使用innertext.

接着,我们来写一个符合这个潜规则的自定义配置文件,方便测试:


接着,我们来写相应的处理类,这里我们由内向外来写:

首先是最内层的mailServer:

/// /// Class MailServerElement:用于映射mailServer节点,这里是实际存储数据的地方; /// /// Editor:v-liuhch CreateTime:2015/6/27 21:51:57 public sealed class MailServerElement : ConfigurationElement //配置文件中的配置元素 { /// /// Gets or sets the client. /// /// The client. /// Editor:v-liuhch CreateTime:2015/6/27 22:05:40 [ConfigurationProperty("client", IsKey = true, IsRequired = true)] //client是必须的key属性,有点儿主键的意思,例如,如果定义多个client相同的节点,循环读取的话就只读取到最后一个值 public string Client { get { return this["client"] as string; } set { this["client"] = value; } } /// /// Gets or sets the address. /// /// The address. /// Editor:v-liuhch CreateTime:2015/6/27 22:05:38 [ConfigurationProperty("address")] public string Address { get { return this["address"] as string; } set { this["address"] = value; } } /// /// Gets or sets the name of the user. /// /// The name of the user. /// Editor:v-liuhch CreateTime:2015/6/27 22:05:35 [ConfigurationProperty("userName")] public string UserName { get { return this["userName"] as string; } set { this["userName"] = value; } } /// /// Gets or sets the password. /// /// The password. /// Editor:v-liuhch CreateTime:2015/6/27 22:05:33 [ConfigurationProperty("password")] public string Password { get { return this["password"] as string; } set { this["password"] = value; } } }

接着是mailServers,它是一个mailServer的集合:

/// /// Class MailServerCollection:映射mailServers节点,为一个集合类,另外还包含了很多对节点的操作方法,站群软件,大部分继承自ConfigurationElementCollection /// /// Editor:v-liuhch CreateTime:2015/6/27 21:52:00 public sealed class MailServerCollection : ConfigurationElementCollection { /// /// 获取 的类型。 /// /// The type of the collection. /// 此集合的 。 /// Editor:v-liuhch CreateTime:2015/6/27 22:05:08 public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.BasicMap; } } /// /// 当在派生的类中重写时,创建一个新的 。 /// /// 新的 。 /// Editor:v-liuhch CreateTime:2015/6/27 22:05:03 protected override ConfigurationElement CreateNewElement() { return new MailServerElement(); } /// /// 在派生类中重写时获取指定配置元素的元素键。 /// ///要为其返回键的 。 /// 一个 ,用作指定 的键。 /// Editor:v-liuhch CreateTime:2015/6/27 22:04:51 protected override object GetElementKey(ConfigurationElement element) { return (element as MailServerElement).Client; } /// /// 获取在派生的类中重写时用于标识配置文件中此元素集合的名称。 /// /// The name of the element. /// 集合的名称;否则为空字符串。默认值为空字符串。 /// Editor:v-liuhch CreateTime:2015/6/27 23:41:40 protected override string ElementName { get { return "mailServer"; } } /// /// 获取集合中的元素数。 /// /// The count. /// 集合中的元素数。 /// Editor:v-liuhch CreateTime:2015/6/27 22:08:24 public new int Count { get { return base.Count; } } /// /// 获取或设置此配置元素的属性、特性或子元素。 /// ///The index. /// MailServerElement. /// Editor:v-liuhch public MailServerElement this[int index] { get { return BaseGet(index) as MailServerElement; } set { if (BaseGet(index) != null) { BaseRemoveAt(index); } BaseAdd(index, value); } } /// /// 获取或设置此配置元素的属性、特性或子元素。 /// ///The name. /// MailServerElement. /// Editor:v-liuhch new public MailServerElement this[string Name] { get { return BaseGet(Name) as MailServerElement; } } /// /// Indexes the of. /// ///The element. /// System.Int32. /// Editor:v-liuhch CreateTime:2015/6/27 22:24:16 public int IndexOf(MailServerElement element) { return BaseIndexOf(element); } /// /// Adds the specified element. /// ///The element. /// Editor:v-liuhch CreateTime:2015/6/27 22:26:06 public void Add(MailServerElement element) { BaseAdd(element); } /// /// Removes the specified element. /// ///The element. /// Editor:v-liuhch CreateTime:2015/6/27 22:27:01 public void Remove(MailServerElement element) { if (BaseIndexOf(element) > 0) { BaseRemove(element.Client); } } /// /// Removes at. /// ///The index. /// Editor:v-liuhch CreateTime:2015/6/27 22:33:29 public void RemoveAt(int index) { BaseRemoveAt(index); } /// /// Removes the specified client. /// ///The client. /// Editor:v-liuhch CreateTime:2015/6/27 22:34:04 public void Remove(string client) { BaseRemove(client); } /// /// Clears this instance. /// /// Editor:v-liuhch CreateTime:2015/6/27 22:34:29 public void Clear() { BaseClear(); } }

最后是最外层的group:

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