/// <summary>
/// 框选要素，需要考虑框的宽度为0的情况
/// </summary>
/// <param name="rect">选择框</param>
/// <returns>选到的要素</returns>
public List <DataRow> SelectByBox(RectangleD rect)
{
List <DataRow> mSelectedRows = new List <DataRow>();
if (this._GeoType == typeof(MultiPolygon))
{
MultiPolygon sMul;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sMul = (MultiPolygon)mRow[2];
if (LayerTools.IsRectInterMultipolygon(sMul, rect))
{
mSelectedRows.Add(mRow);
}
}
}
}
else if (this._GeoType == typeof(MultiPolyLine))
{
MultiPolyLine sMul;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sMul = (MultiPolyLine)mRow[2];
if (LayerTools.IsRectInterMultiPolyline(sMul, rect))
{
mSelectedRows.Add(mRow);
}
}
}
}
else if (this._GeoType == typeof(PointD))
{
PointD sPoint;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sPoint = (PointD)mRow[2];
if (LayerTools.IsPointInRect(sPoint, rect))
{
mSelectedRows.Add(mRow);
}
}
}
}
return(mSelectedRows);
}
public static PointD GetClosePoint(PointD point, List <DataRow> rowList, double tolerance)
{
PointD sPoint = null;
foreach (DataRow sRow in rowList)
{
if (!Convert.IsDBNull(sRow[2]))
{
sPoint = LayerTools.GetClosePoint(point, (Geometry)sRow[2], tolerance);
if (sPoint != null)
{
return(sPoint);
}
}
}
return(null);
}
/// <summary>
/// 点选要素
/// </summary>
/// <param name="point">点</param>
/// <param name="tolerance">容限</param>
/// <returns>此次点击选中的要素</returns>
public List <DataRow> SelectByPoint(PointD point, double tolerance)
{
//List<DataRow> mSelectedRows = _Index.SelectByPoint(point, tolerance);
List <DataRow> mSelectedRows = new List <DataRow>();
if (this._GeoType == typeof(MultiPolygon))
{
MultiPolygon sMul;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sMul = (MultiPolygon)mRow[2];
if (LayerTools.IsPointInMultiPolygon(point, sMul))
{
mSelectedRows.Add(mRow);
}
}
}
}
else if (this._GeoType == typeof(MultiPolyLine))
{
MultiPolyLine sMul;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sMul = (MultiPolyLine)mRow[2];
if (LayerTools.IsPointOnMulPolyline(point, sMul, tolerance))
{
mSelectedRows.Add(mRow);
}
}
}
}
else if (this._GeoType == typeof(PointD))
{
PointD sPoint;
foreach (DataRow mRow in this._DT.Rows)
{
if (!Convert.IsDBNull(mRow[2]))
{
sPoint = (PointD)mRow[2];
if (LayerTools.IsPointOnPoint(point, sPoint, tolerance))
{
mSelectedRows.Add(mRow);
}
}
}
}
//HashSet<DataRow> mSet = _Index.SelectByPoint(point);
//if (this._GeoType == typeof(MultiPolygon))
//{
// MultiPolygon sMultiPolygon;
// if (mSet != null)
// {
// foreach (DataRow row in mSet)
// {
// sMultiPolygon = row.Field<MultiPolygon>(2);
// if (sMultiPolygon != null)
// {
// if (LayerTools.IsPointInMultiPolygon(point, sMultiPolygon))
// {
// mSelectedRows.Add(row);
// }
// //Console.WriteLine("search");
// }
// }
// }
//}
//_SelectedRecords = mSelectedRows;
return(mSelectedRows);
}