C#中的TreeView节点高亮颜色 [英] TreeView node highlight colour in C#

问题描述

使用 Windows 窗体，当我单击 TreeView 节点时，突出显示颜色为蓝色.有没有办法改变这种情况?

Using Windows Forms, when I click on a TreeView node, the highlight colour is blue. Is there a way to change this?

推荐答案

如果您创建自己的 TreeView 类并覆盖 OnDrawNode 方法，这是可能的.例如，这将用红色突出显示选定的节点:

It is possible if you create your own TreeView class and override the OnDrawNode method. For example, this one will highlight selected node with red color:

class ClassMyTreeView:TreeView
{
    public ClassMyTreeView()
    {
        this.DrawMode = TreeViewDrawMode.OwnerDrawText;
    }

    protected override void OnDrawNode(DrawTreeNodeEventArgs e)
    {
        TreeNodeStates state = e.State;
        Font font = e.Node.NodeFont ?? e.Node.TreeView.Font;
        Color fore = e.Node.ForeColor;
        if (fore == Color.Empty) 
            fore = e.Node.TreeView.ForeColor;
        if (e.Node == e.Node.TreeView.SelectedNode)
        {
            fore = SystemColors.HighlightText;
            e.Graphics.FillRectangle(new SolidBrush(Color.Red), e.Bounds);
            ControlPaint.DrawFocusRectangle(e.Graphics, e.Bounds, fore, Color.Red);
            TextRenderer.DrawText(e.Graphics, e.Node.Text, font, e.Bounds, fore, Color.Red, TextFormatFlags.GlyphOverhangPadding);
        }
        else
        {
            e.Graphics.FillRectangle(SystemBrushes.Window, e.Bounds);
            TextRenderer.DrawText(e.Graphics, e.Node.Text, font, e.Bounds, fore, TextFormatFlags.GlyphOverhangPadding);
        }
    }
}

这篇关于C#中的TreeView节点高亮颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！