C# treeview控件部分节点添加checkbox

一、先初始化treeview

            this.treeView1.CheckBoxes = true;
            this.treeView1.ShowLines = false;
            this.treeView1.DrawMode = System.Windows.Forms.TreeViewDrawMode.OwnerDrawAll;

            this.treeView1.DrawNode += new System.Windows.Forms.DrawTreeNodeEventHandler(this.treeView_DrawNode);

二、实现委托事件

      private void treeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
 
//隐藏节点前的checkbox
if (e.Node.ImageIndex==6) HideCheckBox(this.treeView1, e.Node); e.DrawDefault = true; }

三、隐藏的实现

        private const int TVIF_STATE = 0x8;
        private const int TVIS_STATEIMAGEMASK = 0xF000;
        private const int TV_FIRST = 0x1100;
        private const int TVM_SETITEM = TV_FIRST + 63;
        private void HideCheckBox(TreeView tvw, TreeNode node)
        {

            TVITEM tvi = new TVITEM();

            tvi.hItem = node.Handle;

            tvi.mask = TVIF_STATE;

            tvi.stateMask = TVIS_STATEIMAGEMASK;

            tvi.state = 0;

            SendMessage(tvw.Handle, TVM_SETITEM,IntPtr.Zero, ref tvi);

        }

        [StructLayout(LayoutKind.Sequential, Pack = 8, CharSet = CharSet.Auto)]

        private struct TVITEM
        {
            public int mask;
            public IntPtr hItem;
            public int state;
            public int stateMask;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string lpszText;
            public int cchTextMax;
            public int iImage;
            public int iSelectedImage; public int cChildren; public IntPtr lParam;
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref TVITEM lParam);

 

posted @ 2013-07-08 18:58  深山居士  阅读(...)  评论(...编辑  收藏