/// <summary>
/// 设置地图框的图层数据源、图层定义查询、比例尺、地图显示范围等
/// </summary>
/// <param name="graphicsContainer">图形容器</param>
/// <param name="mapFrameInfo">地图框信息</param>
protected virtual void SetMapFrame(IGraphicsContainer graphicsContainer, MapFrameInfo mapFrameInfo)
{
var map = graphicsContainer.GetMapFrame(mapFrameInfo.MapFrameName).Map;
foreach (var layerInfo in mapFrameInfo.LayerInfos)
{
var layer = SetLayerDataSource(map, layerInfo); //设置数据源
if (layer is IFeatureLayer featureLayer) //设置定义查询
{
((IFeatureLayerDefinition)featureLayer).DefinitionExpression = layerInfo.Definition;
}
}
if (mapFrameInfo.Scale > 0)//设置比例尺
{
map.ReferenceScale = mapFrameInfo.Scale;
}
SetMapExtent(map, mapFrameInfo);//设置地图显示范围
}
/// <summary>
/// 设置地图显示范围
/// </summary>
/// <param name="map">地图</param>
/// <param name="mapFrameInfo">地图框信息</param>
protected virtual void SetMapExtent(IMap map, MapFrameInfo mapFrameInfo)
{
//若MapExtent不为null，则地图缩放至MapExtent指定的范围；否则查找LayerInfo.ZoomTo为True的图层来定位缩放
var activeView = map as IActiveView;
if (mapFrameInfo.MapExtent != null)
{
activeView.MapZoomTo(mapFrameInfo.MapExtent, 1.3);
}
else
{
var layerInfo = mapFrameInfo.LayerInfos.FirstOrDefault(v => v.ZoomTo);
if (layerInfo != null)
{
var featureClass = FeatureClassEx.FromPath(layerInfo.DataSource);
var geometries = featureClass.QueryGeometries(layerInfo.Definition);
activeView.MapZoomTo(geometries, 1.3);
}
}
}
