private void TrimPolyline(IFeature trimFeature, IFeature targetFeature, IPoint secondPoint)
{
IGeometry preservedGeom = null;
IGeometry leftGeom = null;
IGeometry rightGeom = null;
double distanceOnCurve = 0;
double nearestDistance = 0;
bool isRightSide = false;
IPoint outPoint = new PointClass();
IFeatureClass featureClass = trimFeature.Class as IFeatureClass;
IDataset dataset = featureClass as IDataset;
IWorkspaceEdit workspaceEdit = dataset.Workspace as IWorkspaceEdit;
if (!(workspaceEdit.IsBeingEdited()))
{
return;
}
try
{ IGeometry targetGeometry = targetFeature.ShapeCopy;
IGeometry trimGeometry = trimFeature.ShapeCopy;
ITopologicalOperator2 topo = trimGeometry as ITopologicalOperator2;
topo.IsKnownSimple_2 = false;
topo.Simplify();
ITopologicalOperator2 topo2 = targetGeometry as ITopologicalOperator2;
topo2.IsKnownSimple_2 = false;
topo2.Simplify();
topo.Cut(targetGeometry as IPolyline, out leftGeom, out rightGeom);
ICurve curve = targetGeometry as ICurve;
curve.QueryPointAndDistance(esriSegmentExtension.esriNoExtension, secondPoint, false, outPoint, ref distanceOnCurve, ref nearestDistance, ref isRightSide);
if (isRightSide)
{
preservedGeom = leftGeom;
}
else
{
preservedGeom = rightGeom;
}
workspaceEdit.StartEditOperation();
trimFeature.Shape = preservedGeom;
trimFeature.Store();
workspaceEdit.StopEditOperation();
FlashGeometry(trimGeometry as IGeometry, 3, 10); }
catch (Exception ex)
{
workspaceEdit.AbortEditOperation();
MessageBox.Show("线要素延伸失败！！" + ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
public void OnDblClick()
{
if (this._isLineStarted)
{
this._snapPoint = null;
try
{
this._isLineStarted = false;
this._linePoints.RemoveAll();
IPolyline other = this._feedback.Stop();
IFeatureSelection targetLayer = Editor.UniqueInstance.TargetLayer as IFeatureSelection;
IEnumIDs iDs = targetLayer.SelectionSet.IDs;
iDs.Reset();
IFeature srcFeature = Editor.UniqueInstance.TargetLayer.FeatureClass.GetFeature(iDs.Next());
if (other.SpatialReference != srcFeature.Shape.SpatialReference)
{
other.Project(srcFeature.Shape.SpatialReference);
other.SpatialReference = srcFeature.Shape.SpatialReference;
}
ITopologicalOperator2 shape = srcFeature.Shape as ITopologicalOperator2;
if (shape != null)
{
shape.IsKnownSimple_2 = false;
shape.Simplify();
ITopologicalOperator2 operator2 = other as ITopologicalOperator2;
operator2.IsKnownSimple_2 = false;
operator2.Simplify();
IGeometry geometry = null;
if (srcFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
{
geometry = shape.Intersect(other, esriGeometryDimension.esriGeometry0Dimension);
}
else
{
geometry = shape.Intersect(other, esriGeometryDimension.esriGeometry1Dimension);
}
if (!geometry.IsEmpty)
{
IGeometry geometry2;
IGeometry geometry3;
shape.Cut(other, out geometry3, out geometry2);
if ((geometry3 != null) && (geometry2 != null))
{
(geometry3 as ITopologicalOperator).Simplify();
(geometry2 as ITopologicalOperator).Simplify();
IFeatureClass featureClass = Editor.UniqueInstance.TargetLayer.FeatureClass;
IFeature feature = featureClass.CreateFeature();
IFeature feature3 = featureClass.CreateFeature();
feature.Shape = geometry3;
feature3.Shape = geometry2;
IAttributeSplit attributeSplitHandleClass = AttributeManager.AttributeSplitHandleClass;
if (attributeSplitHandleClass != null)
{
try
{
Editor.UniqueInstance.StartEditOperation();
Editor.UniqueInstance.AddAttribute = false;
List <IFeature> pFeatureList = null;
pFeatureList = new List <IFeature> {
feature,
feature3
};
attributeSplitHandleClass.AttributeSplit(srcFeature, ref pFeatureList);
feature = pFeatureList[0];
feature3 = pFeatureList[1];
feature.Store();
feature3.Store();
srcFeature.Delete();
Editor.UniqueInstance.StopEditOperation("split");
targetLayer.Clear();
targetLayer.Add(feature);
this._hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection | esriViewDrawPhase.esriViewGeography, null, null);
}
catch (Exception exception)
{
Editor.UniqueInstance.AbortEditOperation();
this._mErrOpt.ErrorOperate(this._mSubSysName, "ShapeEdit.Split", "OnDblClick", exception.GetHashCode().ToString(), exception.Source, exception.Message, "", "", "");
}
}
}
}
}
}
catch (Exception exception2)
{
this._mErrOpt.ErrorOperate(this._mSubSysName, "ShapeEdit.Split", "OnDblClick", exception2.GetHashCode().ToString(), exception2.Source, exception2.Message, "", "", "");
}
}
}
