private void OnDelete(IDA0 dao)
{
string fromActinstId = this.wfResinst.FromActinstId;
if (fromActinstId.IndexOf(',') > 0)
{
throw new CannotCallBackException("不能撤回多个分支到发送任务");
}
Actinst from = dao.Load(typeof(Actinst), fromActinstId) as Actinst;
if (from == null)
{
throw new CannotCallBackException("不能找到前一步环节任务");
}
this.RefreshFrom(from);
this.DeleteToInstance(from, this.wfResinst.Actinst, dao);
}
