本文实例展示了DevExpress设置TreeList图片节点背景色的方法,在项目开发中有一定的应用价值,具体方法如下所示:
主要功能代码如下:
/// <summary>/// 设置图片节点的背景色/// 说明:在CustomDrawNodeImages事件中使用/// </summary>/// <param name="tree">TreeList</param>/// <param name="e">CustomDrawNodeImagesEventArgs</param>/// <param name="builderBackColorHandler">委托</param>public static void CustomImageNodeBackColor(this TreeList tree, CustomDrawNodeImagesEventArgs e, Func<TreeListNode, Color> builderBackColorHandler){ TreeListNode _node = e.Node; Color _backColor = builderBackColorHandler(_node); e.Graphics.FillRectangle(new SolidBrush(_backColor), e.Bounds);}
代码使用方法如下:
private void tlLHData_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e){ try { tlLHData.CustomImageNodeBackColor(e, node => { string _cabId = node.GetKeyID(); CCabInfo _cabInfo = LHDBHelper.GetCabInfo(_cabId); if (_cabInfo != null) { return _cabInfo.CtuOnlineStatus == 1 ? Color.White : Color.LightGray; } return Color.White; }); } catch (Exception) { }}
代码运行效果如下图所示:
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