/// <summary>
/// 展开/收缩图层的图例(最后需要执行toc的Update方法)
/// </summary>
/// <param name="pLayer"></param>
/// <param name="bExpand"></param>
public void ExpandLegend(ILayer pLayer, bool bExpand)
{
ILegendInfo pLegendInfo = pLayer as ILegendInfo;
int iLegendGroupCount = pLegendInfo.LegendGroupCount;
ILegendGroup pLGroup;
for (int i = 0; i < iLegendGroupCount; i++)
{
pLGroup = pLegendInfo.get_LegendGroup(i);
pLGroup.Visible = bExpand;
}
axTOCControl1.Update();
}