public static List<object> getCols(ArrayEx arrayEx, string key)
{
List<object> ret = new List<object>();
for (int i = 0; i < arrayEx.Count; i++)
{
object item = arrayEx.get(i);
ArrayEx child = (ArrayEx)item;
ret.Add(child.get(key));
}
return ret;
}
/// <summary>
/// 在主对象中插入关联的子对象。
/// 通常用于ORM处理，例如：分别查询出主表的记录、相关联表的记录，然后根据主键和外键，关联到主表的记录中。
/// </summary>
/// <param name="array">主表的数组</param>
/// <param name="childArray">关联表的数组</param>
/// <param name="key">主表中的外键</param>
/// <param name="childKey">关联表的主键</param>
/// <param name="assocField">主对象中的子属性</param>
public static void associate(ArrayEx array, ArrayEx childArray, string key, string childKey, string assocField)
{
for (int i = 0; i < array.Count; i++)
{
object item = array.get(i);
ArrayEx arItem = (ArrayEx)item;
ArrayEx associated = ArrayEx.searchField(childArray, childKey, arItem.get(key));
if (associated == null)
{
continue;
}
arItem.set(assocField, associated);
}
}
public static ArrayEx searchField(ArrayEx array, string key, object value)
{
for (int i = 0; i < array.Count; i++)
{
object item = array.get(i);
ArrayEx arItem = (ArrayEx)item;
if (arItem.get(key).Equals(value))
{
return arItem;
}
}
return null;
}
public static ArrayEx from(List<object> list)
{
ArrayEx ret = new ArrayEx();
ret.import(list);
return ret;
}
public static ArrayEx from(Dictionary<string, object> dict)
{
ArrayEx ret = new ArrayEx();
ret.import(dict);
return ret;
}