/// <summary>
/// 获取图层序号
/// </summary>
/// <param name="mapControl">The map control.</param>
/// <param name="layer">图层</param>
/// <returns>如果找到，则返回index，未找到，则返回-1</returns>
public static int GetLayerIndex(this AxMapControl mapControl, ILayer layer)
{
return(mapControl.GetLayerIndex(layer.Name));
}
