TreeView改变选中节点颜色，失去焦点时选中节点仍突显代码,CSharp代码库,德仔网

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【CSharp】 TreeView改变选中节点颜色，失去焦点时选中节点仍突显

作者:greatverve / 发布于2012/10/25/ 732

当用户焦点离开TreeView时，TreeView选中节点仍然高亮，但是颜色太浅，几乎看不出来。这里重写一下DrawMode();可以控制选中节点颜色。TreeView.HideSelection = False;可让选中节点保持高亮。

<div>public FrmMain()</div>
<div>{</div>
<div>  InitializeComponent();</div>
<div>  treeView1.HideSelection = False;</div>
<div>  //自已绘制</div>
<div>  this.treeView1.DrawMode = TreeViewDrawMode.OwnerDrawText;</div>
<div>  this.treeView1.DrawNode += new DrawTreeNodeEventHandler(treeView1_DrawNode);</div>
<div>}
<div></div>
<div>//在绘制节点事件中，按自已想的绘制</div>
<div>private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)</div>
<div>{</div>
<div>  e.DrawDefault = true; //我这里用默认颜色即可，只需要在TreeView失去焦点时选中节点仍然突显</div>
<div>  return;</div>
<div></div>
<div>  if ((e.State & TreeNodeStates.Selected) != 0)</div>
<div>  {</div>
<div>    //演示为绿底白字</div>
<div>    e.Graphics.FillRectangle(Brushes.DarkBlue, e.Node.Bounds);</div>
<div></div>
<div>    Font nodeFont = e.Node.NodeFont;</div>
<div>    if (nodeFont == null) nodeFont = ((TreeView)sender).Font;</div>
<div>    e.Graphics.DrawString(e.Node.Text, nodeFont, Brushes.White,Rectangle.Inflate(e.Bounds, 2, 0));</div>
<div>  }
<div>  else</div>
<div>  {</div>
<div>    e.DrawDefault = true;</div>
<div>  }
<div></div>
<div>  if ((e.State & TreeNodeStates.Focused) != 0)</div>
<div>  {</div>
<div>    using (Pen focusPen = new Pen(Color.Black))</div>
<div>    {</div>
<div>      focusPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;</div>
<div>      Rectangle focusBounds = e.Node.Bounds;</div>
<div>      focusBounds.Size = new Size(focusBounds.Width - 1,</div>
<div>      focusBounds.Height - 1);</div>
<div>      e.Graphics.DrawRectangle(focusPen, focusBounds);</div>
<div>    }
<div>  }
<div></div>
<div>}

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