Question

我有自定义配置设置。

public class GalleryResizeOptionsElement : ConfigurationElement
{
    [ConfigurationProperty("name")]
    public string Name
    {
        get { return (string)this["name"]; }
    }

    [ConfigurationProperty("width")]
    public int Width
    {
        get { return (int)this["width"]; }
    }

    [ConfigurationProperty("height")]
    public int Height
    {
        get { return (int)this["height"]; }
    }
}

public class GalleryResizeOptionsCollection : ConfigurationElementCollection
{
    protected override ConfigurationElement CreateNewElement()
    {
        return new GalleryResizeOptionsElement();
    }

    protected override object GetElementKey(ConfigurationElement element)
    {
        return ((GalleryResizeOptionsElement)element).Name;
    }


    public override ConfigurationElementCollectionType CollectionType
    {
        get { return ConfigurationElementCollectionType.BasicMap; }
    }

    /// <summary>
    /// The element name of the configuration elements in the config file,
    /// as set at UserCommandConfigurationConstants.ElementName
    /// </summary>
    protected override string ElementName
    {
        get { return "add"; }
    }

    /// <summary>
    /// This is a convenience added to allow selection from the collection
    /// via the commandkey as an index
    /// </summary>
    /// <returns></returns>
    public GalleryResizeOptionsElement this[string name]
    {
        get { return (GalleryResizeOptionsElement)this.BaseGet(name); }
    }
}

public class GalleryConfigurationSection : ConfigurationSection
{

    public virtual GalleryResizeOptionsCollection ResizeOptions
    {
        get { return (GalleryResizeOptionsCollection) base["resizeOptions"]; }
    }
}

在web.config文件中添加一个包含此xml配置的部分。

<resizeOptions>
        <add name="Square" width="100" height="100" />
        <add name="Rectangle" width="200" height="100" />
        <add name="Hero" width="600" height="400" />
      </resizeOptions>

为了简洁起见，我已经遗漏了很多其他代码，但我认为我已经包含了提出问题所需的所有内容。

如何更改GalleryResizeOptionsCollection以便我可以返回所有GalleryResizeOptionsElements的列表？或者更清楚地说，我希望能够返回所有“添加”元素的列表。

Answer 1

您可以使用System.Linq返回元素列表：

using System.Linq;

public class GalleryResizeOptionsCollection : ConfigurationElementCollection
{
   //...

   public IList<GalleryResizeOptionsElement> ToList()
   {
      return this.Cast<GalleryResizeOptionsElement>().ToList();
   }
}

从web.config中提取xml元素列表

1 个答案: