foreach代码如何改造成递归

[accpchenjun]

下面代码如何改造成递归的方式

                List<RibbonPageGroup> rpgList = null;
                List<BarButtonItem> bbbiList = null;
                List<RibbonPage> rpList = new List<RibbonPage>();
                foreach (XmlNode xnRibbonPage in nodeList)
                {
                    rpgList = new List<RibbonPageGroup>();
                    foreach (XmlNode xnRibbonPageGroup in xnRibbonPage.ChildNodes)
                    {
                        bbbiList = new List<BarButtonItem>();
                        foreach (XmlNode xnBarButtonItem in xnRibbonPageGroup.ChildNodes)
                        {
                            BarButtonItem bbbii = new BarButtonItem();
                            bbbii.Name = xnBarButtonItem.Attributes["Name"].Value;
                            bbbii.Caption = xnBarButtonItem.Attributes["Caption"].Value;
                            bbbii.Description = xnBarButtonItem.Attributes["NameSpace"].Value;
                            bbbii.ItemClick += new ItemClickEventHandler(BarButtonItem_ItemClick);
                            bbbiList.Add(bbbii);
                        }
                        RibbonPageGroup rpg = new RibbonPageGroup();
                        rpg.Text = xnRibbonPageGroup.Attributes["Text"].Value;
                        rpg.ShowCaptionButton = false;
                        rpg.ItemLinks.AddRange(bbbiList.ToArray());
                        rpgList.Add(rpg);
                    }
                    if (xnRibbonPage.Attributes["Text"].Value != "系统管理")
                    {
                        RibbonPage rp = new RibbonPage();
                        rp.Text = xnRibbonPage.Attributes["Text"].Value;
                        rp.MergedGroups.AddRange(rpgList.ToArray());
                        rpList.Add(rp);
                    }
                    else
                    {
                        rp1.MergedGroups.Add(rpgList[rpgList.Count - 1]);
                        rpList.Add(rp1);
                    }
                }
                if (rp1.MergedGroups.Count == 1)
                    rpList.Add(rp1);
                ribbon.Pages.AddRange(rpList.ToArray());
                ribbon.ItemsVertAlign = DevExpress.Utils.VertAlignment.Top;

[PitTroll]

[Quote=引用 4 楼 accpchenjun 的回复:]
引用 1 楼 pittroll 的回复:

为甚要改成递归

我想测试一下 多层嵌套好递归那个效率高
[/Quote]
递归容易导致内存泄露，以前我测试递归1W层的时候，内存就受不了啦。

[colorall]

递归简单易懂，但很耗资源。特别递归层次得多的时候，一般PC是承受不了了。

[PitTroll]

为甚要改成递归

[luozhongxian001]

foreach (XmlNode xnBarButtonItem in xnRibbonPageGroup.ChildNodes)
{
BarButtonItem bbbii = new BarButtonItem();
bbbii.Name = xnBarButtonItem.Attributes["Name"].Value;
bbbii.Caption = xnBarButtonItem.Attributes["Caption"].Value;
bbbii.Description = xnBarButtonItem.Attributes["NameSpace"].Value;
bbbii.ItemClick += new ItemClickEventHandler(BarButtonItem_ItemClick);
bbbiList.Add(bbbii);
}
该成回调自身函数即可！

[luozhongxian001]

这是我以前做的一个案例你可以参考下：
public void AddTree(int ParentID, TreeNode pNode, TreeView treeView, DataTable dt)
{
DataView dvTree = new DataView(dt);
dvTree.RowFilter = "[ForceID]=" + ParentID;
foreach (DataRowView Row in dvTree)
{
TreeNode Node = new TreeNode();
if (pNode == null)
{ //添加根节点
Node.Text = Row["ConText"].ToString();
treeView.Nodes.Add(Node);
Node.Expanded = true;
AddTree(Int32.Parse(Row["ID"].ToString()), Node, treeView, dt); //再次递归
}
else
{ //̀添加当前节点的子节点
Node.Text = Row["ForceName"].ToString();
pNode.Nodes.Add(Node);
Node.Expanded = true;
AddTree(Int32.Parse(Row["ID"].ToString()), Node, treeView, dt); //再次递归
}
}
}

[accpchenjun]

[Quote=引用 1 楼 pittroll 的回复:]

为甚要改成递归
[/Quote]
我想测试一下 多层嵌套好递归那个效率高

[accpchenjun]

下面是我的完整代码
如何改造成XMLTextReader读数据+递归

XmlDocument xd = new XmlDocument();
                XmlReaderSettings settings = new XmlReaderSettings();
                settings.IgnoreComments = true;
                XmlReader reader = null;
                XmlNodeList nodeList;
                if (SessionManager.Session["Psn_IsAdmin"].ToString() != "True")
                {
                    string userconfig = string.Format("{0}PermissionsMenuList.config", SessionManager.Session["Psn_ID"]);
                    reader = XmlReader.Create(userconfig, settings);
                    xd.Load(reader);
                    nodeList = xd.SelectSingleNode("Ribbon").ChildNodes;
                }
                else
                {
                    reader = XmlReader.Create("AdminMenuList.config", settings);
                    xd.Load(reader);
                    nodeList = xd.SelectSingleNode("Ribbon").ChildNodes;
                }
List<RibbonPageGroup> rpgList = null;
                List<BarButtonItem> bbbiList = null;
                List<RibbonPage> rpList = new List<RibbonPage>();
                foreach (XmlNode xnRibbonPage in nodeList)
                {
                    rpgList = new List<RibbonPageGroup>();
                    foreach (XmlNode xnRibbonPageGroup in xnRibbonPage.ChildNodes)
                    {
                        bbbiList = new List<BarButtonItem>();
                        foreach (XmlNode xnBarButtonItem in xnRibbonPageGroup.ChildNodes)
                        {
                            BarButtonItem bbbii = new BarButtonItem();
                            bbbii.Name = xnBarButtonItem.Attributes["Name"].Value;
                            bbbii.Caption = xnBarButtonItem.Attributes["Caption"].Value;
                            bbbii.Description = xnBarButtonItem.Attributes["NameSpace"].Value;
                            bbbii.ItemClick += new ItemClickEventHandler(BarButtonItem_ItemClick);
                            bbbiList.Add(bbbii);
                        }
                        RibbonPageGroup rpg = new RibbonPageGroup();
                        rpg.Text = xnRibbonPageGroup.Attributes["Text"].Value;
                        rpg.ShowCaptionButton = false;
                        rpg.ItemLinks.AddRange(bbbiList.ToArray());
                        rpgList.Add(rpg);
                    }
                    if (xnRibbonPage.Attributes["Text"].Value != "系统管理")
                    {
                        RibbonPage rp = new RibbonPage();
                        rp.Text = xnRibbonPage.Attributes["Text"].Value;
                        rp.MergedGroups.AddRange(rpgList.ToArray());
                        rpList.Add(rp);
                    }
                    else
                    {
                        rp1.MergedGroups.Add(rpgList[rpgList.Count - 1]);
                        rpList.Add(rp1);
                    }
                }
                if (rp1.MergedGroups.Count == 1)
                    rpList.Add(rp1);
                ribbon.Pages.AddRange(rpList.ToArray());
                ribbon.ItemsVertAlign = DevExpress.Utils.VertAlignment.Top;

[flyerwing]

没能过,这个.