C＃自定義配置部分

Question

我有一個自定義配置部分：

<myServices> 
     <client clientAbbrev="ABC"> 
     <addressService url="www.somewhere.com" username="abc" password="abc"/> 
     </client> 
     <client clientAbbrev="XYZ"> 
     <addressService url="www.somewhereelse.com" username="xyz" password="xyz"/> 
     </client> 
    <myServices> 

我想指的是配置爲：

var section = ConfigurationManager.GetSection("myServices") as ServicesConfigurationSection; 
var abc = section.Clients["ABC"]; 

卻得到了一個

不能申請編入索引類型'ClientElementCollection'的表達式

我該如何做這項工作？

客戶元素集合：

[ConfigurationCollection(typeof(ClientElement), AddItemName = "client")] 
public class ClientElementCollection : ConfigurationElementCollection 
{ 
    protected override ConfigurationElement CreateNewElement() 
    { 
     return new ClientElement(); 
    } 

    protected override object GetElementKey(ConfigurationElement element) 
    { 
     return ((ClientElement) element).ClientAbbrev; 
    } 
} 

客戶元素：

public class ClientElement : ConfigurationElement 
{ 
    [ConfigurationProperty("clientAbbrev", IsRequired = true)] 
    public string ClientAbbrev 
    { 
     get { return (string) this["clientAbbrev"]; } 
    } 

    [ConfigurationProperty("addressService")] 
    public AddressServiceElement AddressService 
    { 
     get { return (AddressServiceElement) this["addressService"]; } 
    } 
} 

Answer 1

您需要添加一個indexer到ClientElementCollection

喜歡的東西

public ClientElement this[string key] 
{ 
    get 
    { 
      return this.Cast<ClientElement>() 
       .Single(ce=>ce.ClientAbbrev == key); 
    } 
}