C# 在app.config中获取ConfigurationElement父级
我已经为我的app.config创建了一个自定义的C# 在app.config中获取ConfigurationElement父级,c#,app-config,configurationsection,configurationelement,C#,App Config,Configurationsection,Configurationelement,我已经为我的app.config创建了一个自定义的ConfigurationSection,ConfigurationElement和ConfigurationElementCollection,它基于 现在,我希望能够访问任何配置元素中的父元素。 例如,以下几行中的某些内容: public class CustomSection : ConfigurationSection { [ConfigurationProperty("child")] public ChildEleme
ConfigurationSection
,ConfigurationElement
和ConfigurationElementCollection
,它基于
现在,我希望能够访问任何配置元素中的父元素。例如,以下几行中的某些内容:
public class CustomSection : ConfigurationSection
{
[ConfigurationProperty("child")]
public ChildElement Child
{
get { return (ChildElement)this["child"]; }
set { this["child"] = value; }
}
}
public class ChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("nestedchild")]
public NestedChildElement NestedChild
{
get { return (NestedChildElement)this["nestedchild"]; }
set { this["nestedchild"] = value; }
}
}
public class NestedChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
public void Sample()
{
// How can I access parent ChildElement object
// and also its parent CustomSection object from here?
}
}
public class CustomSection : ConfigurationSectionBase
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("child")]
public ChildElement Child => base.GetElement<ChildElement>("child");
}
public class ChildElement : ConfigurationElementBase
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("nestedchild")]
public NestedChildElement NestedChild => base.GetElement<NestedChildElement>("nestedchild");
}
public class NestedChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
public void Sample()
{
ChildElement parentChildElement = this.GetParent<ChildElement>();
CustomSection parentCustomSection = parentChildElement.GetParent<CustomSection>();
// TODO Use the parents ...
}
在baseConfigurationElement
类中是否有我缺少的东西可以让我这样做
我希望通过某种通用解决方案能够实现这一点它不需要在每个元素上引入类似父属性的内容,然后需要在每个
ConfigurationProperty
getter中分配该属性值。您在ConfigurationElement
中没有遗漏任何内容,它无法为您提供任何层次结构或顺序信息。例如,您必须自己保存这些信息,请参见
对于通用解决方案,您可能希望在app.config中查看定义父占位符的信息。作为补充说明,在以前的版本中,我已经使用接口(您可以检查以前的提交)和当前版本中的extension属性完成了这项工作 此外,以下是一个精简版,可满足您的要求:
public abstract class ConfigurationElementBase : ConfigurationElement
{
protected T GetElement<T>(string name) where T : ConfigurationElement
=> this.GetChild<T>(name);
}
public abstract class ConfigurationSectionBase : ConfigurationSection
{
protected T GetElement<T>(string name) where T : ConfigurationElement
=> this.GetChild<T>(name);
}
public static class ConfigurationExtensions
{
private static readonly Dictionary<ConfigurationElement, ConfigurationElement> Parents =
new Dictionary<ConfigurationElement, ConfigurationElement>();
public static T GetParent<T>(this ConfigurationElement element) where T : ConfigurationElement
=> (T)Parents[element];
private static void SetParent(this ConfigurationElement element, ConfigurationElement parent)
=> Parents.Add(element, parent);
private static object GetValue(this ConfigurationElement element, string name)
=> element.ElementInformation.Properties.Cast<PropertyInformation>().First(p => p.Name == name).Value;
internal static T GetChild<T>(this ConfigurationElement element, string name) where T : ConfigurationElement
{
T childElement = (T)element.GetValue(name);
if (!Parents.ContainsKey(childElement))
childElement.SetParent(element);
return childElement;
}
}
公共抽象类ConfigurationElementBase:ConfigurationElement
{
受保护的T GetElement(字符串名称),其中T:ConfigurationElement
=>this.GetChild(名称);
}
公共抽象类ConfigurationSectionBase:ConfigurationSection
{
受保护的T GetElement(字符串名称),其中T:ConfigurationElement
=>this.GetChild(名称);
}
公共静态类配置扩展
{
私有静态只读字典父级=
新字典();
公共静态T GetParent(此ConfigurationElement元素),其中T:ConfigurationElement
=>(T)父元素[元素];
私有静态void SetParent(此ConfigurationElement元素,ConfigurationElement父元素)
=>父项。添加(元素,父项);
私有静态对象GetValue(此ConfigurationElement元素,字符串名称)
=>element.ElementInformation.Properties.Cast().First(p=>p.Name==Name).Value;
内部静态T GetChild(此ConfigurationElement元素,字符串名称),其中T:ConfigurationElement
{
T childElement=(T)element.GetValue(name);
如果(!Parents.ContainsKey(childElement))
SetParent(元素);
返回子元素;
}
}
现在,您可以在自定义部分中使用这些基本配置类,如下所示:
public class CustomSection : ConfigurationSection
{
[ConfigurationProperty("child")]
public ChildElement Child
{
get { return (ChildElement)this["child"]; }
set { this["child"] = value; }
}
}
public class ChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("nestedchild")]
public NestedChildElement NestedChild
{
get { return (NestedChildElement)this["nestedchild"]; }
set { this["nestedchild"] = value; }
}
}
public class NestedChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
public void Sample()
{
// How can I access parent ChildElement object
// and also its parent CustomSection object from here?
}
}
public class CustomSection : ConfigurationSectionBase
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("child")]
public ChildElement Child => base.GetElement<ChildElement>("child");
}
public class ChildElement : ConfigurationElementBase
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
[ConfigurationProperty("nestedchild")]
public NestedChildElement NestedChild => base.GetElement<NestedChildElement>("nestedchild");
}
public class NestedChildElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get { return (string)this["name"]; }
set { this["name"] = value; }
}
public void Sample()
{
ChildElement parentChildElement = this.GetParent<ChildElement>();
CustomSection parentCustomSection = parentChildElement.GetParent<CustomSection>();
// TODO Use the parents ...
}
公共类CustomSection:ConfigurationSectionBase
{
[配置属性(“名称”)]
公共字符串名
{
获取{return(string)this[“name”];}
设置{this[“name”]=value;}
}
[配置属性(“子项”)]
public ChildElement Child=>base.GetElement(“Child”);
}
公共类ChildElement:ConfigurationElementBase
{
[配置属性(“名称”)]
公共字符串名
{
获取{return(string)this[“name”];}
设置{this[“name”]=value;}
}
[配置属性(“嵌套子项”)]
public NestedChildElement NestedChild=>base.GetElement(“NestedChild”);
}
公共类NestedChildElement:ConfigurationElement
{
[配置属性(“名称”)]
公共字符串名
{
获取{return(string)this[“name”];}
设置{this[“name”]=value;}
}
公开作废样本()
{
ChildElement parentChildElement=this.GetParent();
CustomSection parentCustomSection=parentChildElement.GetParent();
//要使用家长。。。
}
“ChildElement”类不是“NestedChildElement”类的父类。请注意,“ChildElement”包含一个“ConfigurationProperty”或“NestedChildElement”。在“app.config”中,这是一个“nestedchild”XML元素,它是“child”XML元素的父元素。我希望这能解释问题。