求一 Linq

[LQknife]

初学Linq，找人帮忙^_^！
/*
* 场景：有一Panel控件，这个控件中嵌套了一个或多个TabControl控件，TabControl控件有
* 一个或多个TabPage，最多3层嵌套TabPage.Parent -> TabControl, TabControl.Parent->Panel
* Panel中还有一些其它控件不过这些控件都不会再有子控件
*
* 需求:从这个Panel控件中找出它的子控件，这些子控件不能再有子控件，如果这个子控件是
* TabControl找出这个TabControl中所有TabPage中的子控件(也就是Panel的重孙控件)
*
* 要求：一句Linq搞定
*/

[feifeiyiwen]

up

[我姓区不姓区]

            var controls = (from Control c in panel1.Controls
                            where !c.HasChildren
                            select c).Union(from Control tc in panel1.Controls
                                            let tabPages = tc.Controls.Cast<Control>()
                                            from Control tp in tabPages
                                            let tps = tp.Controls.Cast<Control>()
                                            from tpCtrl in tps
                                            where tc is TabControl
                                            select tpCtrl);

[PENYY]

mark

[LQknife]

其实我的初衷是不想遍历 panel.Controls两次
难道一次遍历搞不定了吗

[baiyunyinv]

var controls = (from Control c in panel1.Controls
                            where !c.HasChildren
                            select c).Union(from Control tc in panel1.Controls
                                            let tabPages = tc.Controls.Cast<Control>()
                                            from Control tp in tabPages
                                            let tps = tp.Controls.Cast<Control>()
                                            from tpCtrl in tps
                                            where tc is TabControl
                                            select tpCtrl);

借用。。。。

[LQknife]

沙发 我自个写的
var query = from c in this.Control.Controls.Cast<Control>()
let ctrls1 = c.Controls.Cast<Control>()
from c1 in ctrls1
let ctrls2 = c1.Controls.Cast<Conltrol>()
where !c.HasChildren && !(c is UCode)
from c2 in ctrls2
但是最后的select不知道怎么把 c 和 c2 连接起来了
对了 再加个要求Linq返回的序列必须是 IEnumrable<Control>

[LQknife]

咋没有将帖子提前功能了？