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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