/// <summary>
/// Gets the count of related objects for a given object
/// </summary>
/// <param name="anObject">Object to check</param>
/// <param name="relationshipClassName">Relationship class to check</param>
/// <returns>int</returns>
public static int GetRelatedObjectCount(ESRI.ArcGIS.Geodatabase.IObject anObject, string relationshipClassName)
{
int result = 0;
if (null == anObject)
{
throw new ArgumentNullException("anObject");
}
if (1 > relationshipClassName.Length)
{
throw new ArgumentException("relationshipClassName not specified.");
}
ESRI.ArcGIS.Geodatabase.IRelationshipClass relationshipClass = GetRelationshipClass(anObject.Class, relationshipClassName);
if (null == relationshipClass)
{
throw new Exception(string.Format("Relationship class {0} could not be found.", relationshipClassName));
}
ESRI.ArcGIS.esriSystem.ISet relatedObjects = relationshipClass.GetObjectsRelatedToObject(anObject);
result = relatedObjects.Count;
return(result);
}
/// <summary>
/// 根据参考线要素，对选择的线要素进行裁剪
/// </summary>
/// <param name="featTrim">待裁剪的线要素</param>
/// <param name="featRef">参考线要素</param>
/// <returns>成功返回True</returns>
public bool TrimLine(IFeature featTrim, IFeature featRef, IPoint pMousePnt)
{
IFeatureEdit pFeatEdit = null;
ESRI.ArcGIS.esriSystem.ISet pSet = null;
IFeature pFeature = null;
try
{
//当没有交点的时候不做任何操作
IPolyline pTrimLine = featTrim.ShapeCopy as IPolyline;
IPointCollection pIntelsectCol = GetIntersection(featRef.ShapeCopy, pTrimLine);
if (pIntelsectCol == null || pIntelsectCol.PointCount < 1)
{
System.Windows.Forms.MessageBox.Show("参考线与要裁剪的线没有交点，无法完成裁剪！");
return(false);
}
if (pIntelsectCol.PointCount > 1) //大于1个交点也不处理
{
System.Windows.Forms.MessageBox.Show("参考线与要裁剪的线交点大于1个，无法完成裁剪！");
return(false);
}
IPoint pIntersectPt = pIntelsectCol.Point[0]; //裁剪线与参考线的交点
pFeatEdit = featTrim as IFeatureEdit;
pSet = pFeatEdit.Split(pIntersectPt);
pSet.Reset();
//pFeature = (IFeature)pSet.Next();
//while (pFeature != null)
//{
// IPolyline5 polylineTemp = pFeature.ShapeCopy as IPolyline5;
// IRelationalOperator relaOperator = pMousePnt as IRelationalOperator;
// if (relaOperator.Within(polylineTemp))//如果包含鼠标点，则删除
// {
// if (m_engineEditor != null)
// {
// m_engineEditor.StartOperation();
// pFeature.Delete();
// m_engineEditor.StopOperation("Delete Features");
// }
// }
// pFeature = (IFeature)pSet.Next();
//}
//ISegmentCollection trimSegCol = featTrim.ShapeCopy as ISegmentCollection;
//ISegmentCollection refSegCol = featRef.ShapeCopy as ISegmentCollection;
////得到选中地物离点击处最近的segment
//ISegment seg = null;
//int indexSegment = GetSelectSegment(featTrim, pMousePnt, ref seg);
//if (seg == null)
// return false;
////得到与segment相交的所有交点
//ISegmentCollection pLineSegCol = new PolylineClass();
//pLineSegCol.AddSegment(seg);
//IPolyline pSegLine = pLineSegCol as IPolyline;
//IPoint pLeftPnt = null;
//IPoint pRightPnt = null;
//GetColseIntersect(pIntelsectCol, pMousePnt, seg, out pLeftPnt, out pRightPnt);
//if (pLeftPnt == null || pRightPnt == null)
// return false;
//List<IFeature> lstFeats = null;
//IFeature pNewFeatOne = null;
//IFeature pNewFeatTwo = null;
////修剪在启始端
//if (indexSegment == 0 && pLeftPnt.X == pLineSegCol.Segment[0].FromPoint.X && pLeftPnt.Y == pLineSegCol.Segment[0].FromPoint.Y)
//{
// lstFeats = new List<IFeature>();
// pFeatEdit = featTrim as IFeatureEdit;
// pSet = pFeatEdit.Split(pRightPnt);
// pSet.Reset();
// pFeature = (IFeature)pSet.Next();
// while (pFeature != null)
// {
// lstFeats.Add(pFeature);
// pFeature = (IFeature)pSet.Next();
// }
// pFeature = GetCloseFeature(m_hookHelper.FocusMap, pMousePnt, lstFeats);
// m_engineEditor.StartOperation();
// pFeature.Delete();
// m_engineEditor.StopOperation("Delete Features");
// for (int j = 0; j < lstFeats.Count; j++)
// {
// if (!lstFeats[j].Equals(pFeature))
// pNewFeatOne = lstFeats[j];
// }
//}
////修剪在末端
//else if (indexSegment == pLineSegCol.SegmentCount - 1 && pRightPnt.X == pLineSegCol.Segment[pLineSegCol.SegmentCount - 1].ToPoint.X)
//{
// lstFeats = new List<IFeature>();
// pFeatEdit = featTrim as IFeatureEdit;
// pSet = pFeatEdit.Split(pLeftPnt);
// pSet.Reset();
// pFeature = (IFeature)pSet.Next();
// while (pFeature != null)
// {
// lstFeats.Add(pFeature);
// pFeature = (IFeature)pSet.Next();
// }
// pFeature = GetCloseFeature(m_hookHelper.FocusMap, pMousePnt, lstFeats);
// m_engineEditor.StartOperation();
// pFeature.Delete();
// m_engineEditor.StopOperation("Delete Features");
// for (int j = 0; j < lstFeats.Count; j++)
// {
// if (!lstFeats[j].Equals(pFeature))
// pNewFeatOne = lstFeats[j];
// }
//}
//else //修剪在其它位置
//{
// lstFeats = new List<IFeature>();
// pFeatEdit = featTrim as IFeatureEdit;
// pSet = pFeatEdit.Split(pLeftPnt);
// pSet.Reset();
// pFeature = (IFeature)pSet.Next();
// while (pFeature != null)
// {
// lstFeats.Add(pFeature);
// pFeature = (IFeature)pSet.Next();
// }
// pFeature = GetCloseFeature(m_hookHelper.FocusMap, pMousePnt, lstFeats);
// for (int j = 0; j < lstFeats.Count; j++)
// {
// if (!lstFeats[j].Equals(pFeature))
// pNewFeatOne = lstFeats[j];
// }
// lstFeats = new List<IFeature>();
// pFeatEdit = pFeature as IFeatureEdit;
// pSet = pFeatEdit.Split(pRightPnt);
// pSet.Reset();
// pFeature = (IFeature)pSet.Next();
// while (pFeature != null)
// {
// lstFeats.Add(pFeature);
// pFeature = (IFeature)pSet.Next();
// }
// pFeature = GetCloseFeature(m_hookHelper.FocusMap, pMousePnt, lstFeats);
// m_engineEditor.StartOperation();
// pFeature.Delete();
// m_engineEditor.StopOperation("Delete Features");
// for (int j = 0; j < lstFeats.Count; j++)
// {
// if (!lstFeats[j].Equals(pFeature))
// pNewFeatTwo = lstFeats[j];
// }
//}
return(true);
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message, "Trim Line");
return(false);
}
}
public bool Applies(ESRI.ArcGIS.esriSystem.ISet objects)
{
return(false);
}
public void SetObjects(ESRI.ArcGIS.esriSystem.ISet objects)
{
}
