/// <summary>
/// 缩放至图层
/// </summary>
/// <param name="axMapControl">地图控件</param>
/// <param name="featureLayerName">要素图层名称，该图层应当存在于地图控件中</param>
public static void MapZoomToLayer(this AxMapControl axMapControl, string featureLayerName)
{
var featureLayer = axMapControl.GetFeatureLayer(featureLayerName);
if (featureLayer == null)
{
throw new Exception($"在地图控件中，找不到名为“{featureLayerName}的要素图层”");
}
MapZoomTo(axMapControl.ActiveView, featureLayer.AreaOfInterest);
}
/// <summary>
/// 地图缩放至指定要素并闪烁
/// </summary>
/// <param name="axMapControl">地图控件</param>
/// <param name="featureLayerName">要素图层名称，该图层应当存在于地图控件中</param>
/// <param name="whereClause">筛选要素的where条件</param>
/// <param name="nFlashes">闪烁次数</param>
public static void MapZoomToAndFlash(this AxMapControl axMapControl, string featureLayerName, string whereClause, int nFlashes = 2)
{
var featureLayer = axMapControl.GetFeatureLayer(featureLayerName);
if (featureLayer == null)
{
throw new Exception($"在地图控件中，找不到名为“{featureLayerName}的要素图层”");
}
MapZoomToAndFlash(axMapControl, featureLayer, whereClause, nFlashes);
}
/// <summary>
/// 地图缩放至指定要素并闪烁
/// </summary>
/// <param name="axMapControl">地图控件</param>
/// <param name="featureLayerName">要素图层名称，该图层应当存在于地图控件中</param>
/// <param name="whereClause">筛选要素的where条件</param>
/// <param name="nFlashes">闪烁次数</param>
public static void MapZoomToAndFlash(this AxMapControl axMapControl, string featureLayerName, int[] oids, int nFlashes = 2)
{
var featureLayer = axMapControl.GetFeatureLayer(featureLayerName);
if (featureLayer == null)
{
throw new Exception($"在地图控件中，找不到名为“{featureLayerName}的要素图层”");
}
var strOids = oids.Select(v => v.ToString()).Aggregate((a, b) => a + "," + b);
var whereClause = $"{featureLayer.FeatureClass.OIDFieldName} In ({strOids})";
MapZoomToAndFlash(axMapControl, featureLayer, whereClause, nFlashes);
}
