/// <summary>获取数据源</summary>
/// <returns></returns>
public virtual IDictionary <Object, String> GetDataSource()
{
var fact = EntityType.AsFactory();
var key = Key;
var mst = fact.Master?.Name;
if (key.IsNullOrEmpty())
{
throw new ArgumentNullException("没有设置关联键", nameof(Key));
}
if (mst.IsNullOrEmpty())
{
throw new ArgumentNullException("没有设置主要字段");
}
// 数据较少时，从缓存读取
var list = fact.Count < 1000 ? fact.FindAllWithCache() : fact.FindAll("", null, null, 0, 100);
return(list.ToDictionary(e => e[key], e => e[mst] + ""));
}