ComboBox和Treeview组合.docxVIP

自定义控件---在combobox下拉列表中添加TreeViewusing System;using System.ComponentModel;using System.Drawing;using System.Windows.Forms;namespace UserControls{/// summary/// TreeViewComboBox 的摘要说明。/// /summarypublic class TreeViewComboBox : UserControl{ /// summary /// 必需的设计器变量。 /// /summary private Container components = null; public delegate void EventHandle(TreeNode n); public event EventHandle AfterSelectedNode; private bool _allowSelectParentNode = false; public TreeViewComboBox() { this.InitializeComponent(); // Initializing Controls this.pnlBack = new Panel(); this.pnlBack.BorderStyle = BorderStyle.Fixed3D; this.pnlBack.BackColor = Color.White; this.pnlBack.AutoScroll = false; this.tbSelectedValue = new TextBox(); this.tbSelectedValue.BorderStyle = BorderStyle.None; this.tbSelectedValue.ReadOnlyChanged += new EventHandler(tbSelectedValue_ReadOnlyChanged); this.btnSelect = new ButtonEx(); this.btnSelect.Click += new EventHandler(ToggleTreeView); this.btnSelect.FlatStyle = FlatStyle.Flat; this.lblSizingGrip = new LabelEx(); this.lblSizingGrip.Size = new Size(9,9); this.lblSizingGrip.BackColor = Color.Transparent; this.lblSizingGrip.Cursor = Cursors.SizeNWSE; this.lblSizingGrip.MouseMove += new MouseEventHandler(SizingGripMouseMove); this.lblSizingGrip.MouseDown += new MouseEventHandler(SizingGripMouseDown); this.tvTreeView = new TreeView(); this.tvTreeView.BorderStyle = BorderStyle.None; this.tvTreeView.DoubleClick += new EventHandler(TreeViewNodeSelect); this.tvTreeView.Location = new Point(0,0); this.tvTreeView.LostFocus += new EventHandler(TreeViewLostFocus); //this.tvTreeView.Scrollable = false; this.frmTreeView = new Form(); this.frmTreeView.FormBorderStyle = FormBorderStyle.None; this.frmTreeView.BringToFront(); this.frmTreeView.StartPosition = FormStartPosition.Manual; this.frmTreeView.ShowInTaskbar = false; this.frmTreeView.BackColor = SystemColors.Control; this.pnlTree = new Panel(); this.pnlTree.BorderStyle = BorderStyle.FixedSingle; this.pnlTree.BackColor = Color.