/// <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);
}
