/// <summary>设置类型</summary>
/// <param name="key"></param>
/// <param name="value">数值</param>
public void SetItem(String key, Object value)
{
if (value == null)
{
this[key] = String.Empty;
return;
}
var t = value.GetType();
if (t.IsValueType || Type.GetTypeCode(t) == TypeCode.String || t == typeof(Object))
{
this[key] = value.ToString();
return;
}
else if (value is IEnumerable)
{
var data = new ExtendData();
data.Root = key;
IEnumerable list = value as IEnumerable;
Int32 i = 1;
foreach (var item in list)
{
data["Item" + i++.ToString()] = item.ToString();
}
this[key] = data.ToXml();
if (XmlKeys == null) XmlKeys = new List<String>();
if (!XmlKeys.Contains(key)) XmlKeys.Add(key);
return;
}
throw new XException(String.Format("不支持的类型{0}，键{1}，数据{2}", t, key, value));
}
/// <summary>取得指定键的强类型值</summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public T GetItem <T>(String key)
{
if (!Contain(key))
{
return(default(T));
}
String value = this[key];
if (String.IsNullOrEmpty(value))
{
return(default(T));
}
Type t = typeof(T);
if (t.IsValueType || Type.GetTypeCode(t) == TypeCode.String || t == typeof(Object))
{
return((T)Convert.ChangeType(value, t));
}
else if (t.IsArray || value is IEnumerable)
{
ExtendData data = FromXml(value);
if (data == null)
{
throw new XException("ExtendData无法分析数据" + value);
}
List <String> list = new List <String>();
for (Int32 i = 1; i < Int32.MaxValue; i++)
{
if (!data.Contain("Item" + i.ToString()))
{
break;
}
list.Add(data["Item" + i.ToString()]);
}
return((T)Convert.ChangeType(list.ToArray(), t));
}
throw new XException("不支持的类型{0}，键{1}", typeof(T), key);
}
/// <summary>从Xml转为具体数据</summary>
/// <param name="xml"></param>
/// <returns></returns>
public static ExtendData FromXml(String xml)
{
if (String.IsNullOrEmpty(xml))
{
return(null);
}
var doc = new XmlDocument();
try
{
doc.LoadXml(xml);
}
catch (XmlException ex)
{
XTrace.WriteLine("Xml数据异常！" + ex.Message + Environment.NewLine + xml);
throw;
}
var extend = new ExtendData();
var root = doc.DocumentElement;
extend.Root = root.Name;
if (root.ChildNodes != null && root.ChildNodes.Count > 0)
{
foreach (XmlNode item in root.ChildNodes)
{
if (item.ChildNodes != null && (item.ChildNodes.Count > 1 ||
item.ChildNodes.Count == 1 && !(item.FirstChild is XmlText)))
{
extend[item.Name] = item.InnerXml;
}
else
{
extend[item.Name] = item.InnerText;
}
}
}
return(extend);
}
