2
根据我的app.config我希望能够得到列的元素,如下面的示例3-5行所示。我应该如何编写代码才能实现这一目标。如果我需要更改我的app.config - 我会做。如何从C#中的app.config中获取一些元素?
1. var bounceProviders = ConfigurationManager.GetSection("BounceProviders") as BounceProvidersSection;
2. var providerColumns = bounceProviders.Providers[0].Columns;
3. var emailColumn = providerColumns.Email;
4. var dateColumn = providerColumns.Date;
5. var messageColumn = providerColumns.Message;
的app.config
<BounceProviders>
<Providers>
<Provider Name="p1">
<Columns>
<Email Name="My Email" />
<Date Name="My Date" />
<Message Name="My Message" />
</Columns>
</Provider>
<Provider Name="p2">
<Columns />
</Provider>
</Providers>
</BounceProviders>
的ConfigurationSection
public class BounceProvidersSection : ConfigurationSection
{
[ConfigurationCollection(typeof(ConfigCollection<BounceProviderConfig>), AddItemName = "Provider")]
[ConfigurationProperty("Providers", IsRequired = true)]
public ConfigCollection<BounceProviderConfig> Providers
{
get { return (ConfigCollection<BounceProviderConfig>)this["Providers"]; }
set { this["Providers"] = value; }
}
}
public class BounceProviderConfig : ConfigurationElement
{
[ConfigurationProperty("Name", IsRequired = true)]
public string Name
{
get { return (string)this["Name"]; }
set { this["Name"] = value; }
}
}
ConfigCollection
public class ConfigCollection<T> : ConfigurationElementCollection
where T : ConfigurationElement, new()
{
protected override ConfigurationElement CreateNewElement()
{
return new T();
}
protected override object GetElementKey(ConfigurationElement element)
{
return element.GetHashCode();
}
public T this[int index]
{
get
{
return (T)BaseGet(index);
}
set
{
if (BaseGet(index) != null)
{
BaseRemoveAt(index);
}
BaseAdd(index, value);
}
}
new public T this[string Name]
{
get
{
return (T)BaseGet(Name);
}
}
}
自卫队
一张小纸条:'返回element.GetHashCode()':这是不正确的,散列码并不打算是唯一的。你的代码可能会在这里出现异常。 – Dennis 2012-08-02 08:34:06