treeview如何实现鼠标经过节点效果？

Question

如QQ...鼠标放在一个人员处都会有个透明的蓝色背景。
设置treeview的节点背景颜色不好使效果不好。

Answer 1

用treeView1_DrawNode画private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
            Color foreColor;
            Color backColor;
            if ((e.State & TreeNodeStates.Selected )> 0)
            {
                foreColor = Color.White;
                backColor = SystemColors.ActiveCaption;
            }
            else if ((e.State & TreeNodeStates.Hot)>0)
            {
                foreColor = Color.Black;
                backColor = Color.GreenYellow;
            }
            else
            {
                foreColor = Color.Black;
                backColor = Color.White;
            }          
            e.Graphics.FillRectangle(new SolidBrush(backColor), e.Bounds);
            e.Graphics.DrawString(e.Node.Text, this.treeView1.Font, new SolidBrush(foreColor), e.Bounds);        }
并设置
 this.treeView1.DrawMode = System.Windows.Forms.TreeViewDrawMode.OwnerDrawText;
  this.treeView1.HotTracking = true;

Answer 2

 private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
            Color foreColor;
            Color backColor;
            if ((e.State & TreeNodeStates.Selected) > 0)
            {
                foreColor = Color.White;
                backColor = SystemColors.ActiveCaption;
            }
            else if ((e.State & TreeNodeStates.Hot) > 0)
            {
                foreColor = this.treeView1.ForeColor;
                backColor = Color.GreenYellow;
            }
            else
            {
                foreColor = this.treeView1.ForeColor;
                backColor = this.treeView1.BackColor;
            }
            e.Graphics.FillRectangle(new SolidBrush(backColor), new Rectangle(e.Bounds.Location, new Size(this.treeView1.Width - e.Bounds.X, e.Bounds.Height)));
            e.Graphics.DrawString(e.Node.Text, this.treeView1.Font, new SolidBrush(foreColor), e.Bounds);         }

Answer 3

是指各个treenode的颜色和字体吗? 还是treeview的初始化设置？
 private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
            Color foreColor;
            Color backColor;
            if ((e.State & TreeNodeStates.Selected) > 0)
            {
                foreColor = Color.White;
                backColor = SystemColors.ActiveCaption;
            }
            else if ((e.State & TreeNodeStates.Hot) > 0)
            {
                foreColor = e.Node.ForeColor;  //用该node的forecolor.
                backColor = Color.GreenYellow;
            }
            else
            {
                foreColor = e.Node.ForeColor;
                backColor = Color.White;
            }
            e.Graphics.FillRectangle(new SolidBrush(backColor), new Rectangle(e.Bounds.Location, new Size(this.treeView1.Width - e.Bounds.X, e.Bounds.Height)));
            if (e.Node.NodeFont != null)
                e.Graphics.DrawString(e.Node.Text, e.Node.NodeFont, new SolidBrush(foreColor), e.Bounds);
            else                e.Graphics.DrawString(e.Node.Text, this.treeView1.Font, new SolidBrush(foreColor), e.Bounds);
        }

Answer 4

treeview的初始化 我已经给部分treenode节点的字体加过颜色了。我想要保持住。
treeView1_DrawNode 这事件差不多能实现了，右边是都有颜色了，但简单左边还是没颜色..(节点都带有图标)

Answer 5

我已经给部分treenode节点的字体加过颜色了。我想要保持住:
可以用e.Node.ForeColor;右边是都有颜色了，但简单左边还是没颜色..(节点都带有图标)：
 没有现成的方法，
 用 e.Graphics.FillRectangle(new SolidBrush(backColor), new Rectangle(new Point(0,e.Bounds.Y), new Size(this.treeView1.Width , e.Bounds.Height)));
  这样填充了整个区域，路径的线条，以及小+号和你的图标都用自己画上去。 

Answer 6

乱写的 不知道是不是这个意思  private void treeView1_MouseMove(object sender, MouseEventArgs e)
        {
            TreeView _TreeView = (TreeView)sender;
            TreeNode _Node =  treeView1.GetNodeAt(e.X, e.Y);
                       if (_Node != null)
            {
                if (_TreeView.Tag == null ||  !_TreeView.Tag.Equals(_Node))
                {
                    _TreeView.Refresh();
                    Graphics _Graphics = Graphics.FromHwnd(_TreeView.Handle);
                    _Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), _Node.Bounds);
                    _Graphics.Dispose();
                    _TreeView.Tag = _Node;
                }
                else
                {                }
            }
        }

Answer 7

和 h_w_king差不多，
估计只能用他说的：
用 e.Graphics.FillRectangle(new SolidBrush(backColor), new Rectangle(new Point(0,e.Bounds.Y), new Size(this.treeView1.Width , e.Bounds.Height))); 
 这样填充了整个区域，路径的线条，以及小+号和你的图标都用自己画上去。 
这方法我看行。

Answer 8

9楼的方法是在node上加上一块半透明的色块，改一下可能可呢满足lz的要求.
 _Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), new Rectangle(new Point(0, _Node.Bounds.Y), new Size(this.treeView1.Width, _Node.Bounds.Height)));