IEnumerable<DingErItemObj> deios = from sdrfb in this.SDRFBS
join nodeid in nodeids on sdrfb.DFID equals nodeid
join deitem in this.DingErObj.Items on sdrfb.DBID equals deitem.ItemID
select deitem;
join nodeid in nodeids on sdrfb.DFID equals nodeid
join deitem in this.DingErObj.Items on sdrfb.DBID equals deitem.ItemID
select deitem;
下面语句编译都通不过
IEnumerable<DingErItemObj> deios = from sdrfb in this.SDRFBS
join nodeid in nodeids on nodeid equals sdrfb.DFID
join deitem in this.DingErObj.Items on sdrfb.DBID equals deitem.ItemID
select deitem;
join nodeid in nodeids on nodeid equals sdrfb.DFID
join deitem in this.DingErObj.Items on sdrfb.DBID equals deitem.ItemID
select deitem;
也就是距离from越近,表达式也就尽量放在前