Treeview控件失去焦点，将选择的节点设置为高亮显示

Love The Way You Lie 2023-08-17 17:23 96阅读 0赞

1.  修改TreeView的属性  
    
    
        1 this.treeView1.HideSelection = false;
        2 this.treeView1.DrawMode = TreeViewDrawMode.OwnerDrawText;
2.  添加treeView1\_DrawNode事件
    
        1 private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        2 {
        3   e.DrawDefault = true;//由操作系统绘制节点，默认值为false
        4 }
    
        1 private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
         2 {
         3     if ((e.State & TreeNodeStates.Selected) != 0)
         4     {
         5         e.Graphics.FillRectangle(Brushes.DodgerBlue, e.Node.Bounds);
         6 
         7         Font nodeFont = e.Node.NodeFont;
         8         if (nodeFont == null) nodeFont = ((TreeView)sender).Font;
         9         e.Graphics.DrawString(e.Node.Text, nodeFont, Brushes.White, Rectangle.Inflate(e.Bounds, 2, 0));
        10     }
        11     else
        12     {
        13         e.DrawDefault = true;
        14     }
        15 
        16     if ((e.State & TreeNodeStates.Focused) != 0)
        17     {
        18         using (Pen focusPen = new Pen(Color.White))
        19         {
        20             focusPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
        21             Rectangle focusBounds = e.Node.Bounds;
        22             focusBounds.Size = new Size(focusBounds.Width - 1,
        23             focusBounds.Height - 1);
        24             e.Graphics.DrawRectangle(focusPen, focusBounds);
        25         }
        26     }
        27 }

转载于:https://www.cnblogs.com/DerekDeng/p/11533701.html