C# treeview控件部分节点添加checkbox

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转自：http://www.cnblogs.com/xiaolifeidao/p/3178569.html

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);

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