winform节点处理

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1、查找一个节点的所有子节点（借鉴）

private bool FindNode(TreeNode Node)
{

。。。
        return true;
        }
        private void FindAllNodes(TreeNode baseTreeNode)
        {
            int num = baseTreeNode.Nodes.Count;
            TreeNode Node;
            for (int i = 0; i < num - 1; i++)
            {
                Node = baseTreeNode.Nodes[i];
                findNode(Node);
                if (Node.Nodes.Count > 0)
                {
                    findAllNodes(Node);
                }
            }
        }
调用:FindAllNodes(treeview1.SelectedNode)

2、 /// <summary>
/// 递归通过某个value查找节点
/// </summary>
/// <param name="tnParent"></param>
/// <param name="strValue"></param>
/// <returns></returns>
private TreeNode FindNode(TreeNode tnParent, string strValue)
{
if (tnParent == null) return null;
if (tnParent.Text == strValue)
return tnParent;
TreeNode tnRet = null;
foreach (TreeNode tn in tnParent.Nodes)
{
tnRet = FindNode(tn, strValue);
if (tnRet != null)
break;
}
return tnRet;
}

3、将还有父子节点的List绑定到treeview

/// <summary>
/// 数据库的图层类型绑定到树
/// </summary>
/// <param name="list"></param>
/// <param name="Nds"></param>
/// <param name="parentId"></param>
public void InitTree(List<LayerType> list, TreeNodeCollection Nds, int parentId)
{

TreeNode NewNode;
for (int i = 0; i < list.Count; i++)
{
int id = list[i].TypeID;
if (list[i].ParentID == parentId)
{
NewNode = new TreeNode(list[i].TypeName);
NewNode.Tag = list[i].TypeCode;
Nds.Add(NewNode);

LayerData info = new LayerData();
if (null == NewNode.Tag)
info.TypeId = 0;
else
info.TypeId = int.Parse(NewNode.Tag.ToString());
info.LayerNumber = list[i].TypeID;
info.FullName = NewNode.FullPath;

NewNode.ImageIndex = 0;
NewNode.SelectedImageIndex = 1;
InitTree(list, NewNode.Nodes, id);
// NewNode.ExpandAll();
}
}
}

调用：InitTree(layerTypes, trvType.Nodes, 0);

4、

        private void LoadWorkArea()        {            trvcmbWorkArea.Nodes.Clear();            List<WorkArea> workAreas = dataCollection.GetWorkAreas(null);            if (workAreas != null && workAreas.Count > 0)            {                ConditionNode cNode = new ConditionNode();                cNode.IsLeaf = true;                cNode.Name = "GraphId";                cNode.Op = Operation.EQ;                cNode.Value = -999;                Condition condition = new Condition(cNode);                List<Target> targets = dataCollection.GetTargets(condition);                for (int i = 0; i < workAreas.Count; i++)                {                    if (workAreas[i].Parentid == 0)                    {                        TreeNode root = new TreeNode();                        root.Text = workAreas[i].Workareaname;                        root.Tag = workAreas[i];                        trvcmbWorkArea.Nodes.Add(root);                        AddTargetNode(root, targets);                        if (workAreas.Exists(wa => wa.Parentid == workAreas[i].Workareaid))                        {                            LoadSubWorkArea(root, workAreas, targets);                        }                    }                }                trvcmbWorkArea.ExpandAll();            //    SelectDefauleTarget();            }        }        /// <summary>        /// 添加成图目标节点        /// </summary>        /// <param name="wNode">工区节点</param>        /// <param name="targets">成图目标集合</param>        private void AddTargetNode(TreeNode wNode, List<Target> targets)        {            int wId = ((WorkArea)wNode.Tag).Workareaid;            //按工区筛选            List<Target> tars = targets.FindAll(t => t.Workareaid == wId);            if (tars != null && tars.Count > 0)            {                for (int i = 0; i < tars.Count; i++)                {                    TreeNode node = new TreeNode();                    node.Text = tars[i].Targetname;                    node.Tag = tars[i];                    wNode.Nodes.Add(node);                }            }        }        /// <summary>        /// 加载子工区（递归）        /// </summary>        /// <param name="pNode">父节点</param>        /// <param name="workAreas">工区集合</param>        /// <param name="targets">成图目标集合</param>        private void LoadSubWorkArea(TreeNode pNode, List<WorkArea> workAreas, List<Target> targets)        {            int pId = ((WorkArea)pNode.Tag).Workareaid;            for (int i = 0; i < workAreas.Count; i++)            {                if (workAreas[i].Parentid == pId)                {                    TreeNode node = new TreeNode();                    node.Text = workAreas[i].Workareaname;                    node.Tag = workAreas[i];                    pNode.Nodes.Add(node);                    AddTargetNode(node, targets);                    if (workAreas.Exists(wa => wa.Parentid == workAreas[i].Workareaid))                    {                        LoadSubWorkArea(node, workAreas, targets);                    }                }            }        }

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