public void Dispose()
{
ComUtils.ReleaseComObject(_construction);
_properties = null;
_construction = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="BufferFactory"/> class.
/// </summary>
/// <param name="explodeBuffers">if set to <c>true</c> multipart buffers will be exploded.</param>
/// <param name="densify">if set to <c>true</c> straight line segments are used to represent the buffer output (i.e. <see cref="GenerateCurves"/> is set to <c>false</c>). Otherwise, curve segments are used in the output.</param>
/// <param name="densifyDeviation"> The maximum distance between a line connecting two buffer curve points and the true curve
/// (defaults to -1, indicating 1000 * xy tolerance of spatial reference of input geometries ).</param>
public BufferFactory(bool explodeBuffers = false, bool densify = false,
double densifyDeviation = -1)
{
_construction = new BufferConstructionClass();
_properties = (IBufferConstructionProperties)_construction;
_properties.ExplodeBuffers = explodeBuffers;
if (densify)
{
_properties.GenerateCurves = false;
_properties.DensifyDeviation = densifyDeviation;
}
}
private void Btnok_Click(object sender, EventArgs e)
{
if (m_mapControl.Map.SelectionCount == 0)
{
MessageBox.Show("请先选择待查询要素！");
return;
}
IEnumFeature pEnumfeature;
IFeature pFeature;
IFeature newFeat;
//ITopologicalOperator pToplogicalOper;
//IPolygon pPolygon;
double bufferDistence;
if (m_mapControl.Map.SelectionCount == 0)
{
return;
}
bufferDistence = Convert.ToDouble(BufferText.Text);
pEnumfeature = m_mapControl.Map.FeatureSelection as IEnumFeature;
pEnumfeature.Reset();
pFeature = pEnumfeature.Next();
IFeatureClass pFeatureclass;
FileInfo n = new FileInfo(textBox1.Text);
string openpath = n.Directory.ToString();//取路径的父目录用于存新的layer
pFeatureclass = CreatNewShapefile(openpath, n.Name, m_mapControl.SpatialReference);
//IFeatureBuffer pFeatureBuffer = pFeatureclass.CreateFeatureBuffer();
//IFeatureCursor pFeatureCursor = pFeatureclass.Insert(true);
int iFieldAttribute = pFeatureclass.FindField("Text");
//while (pFeature != null)
//{
// pToplogicalOper = pFeature.Shape as ITopologicalOperator;
// pPolygon = new PolygonClass();
// pPolygon = pToplogicalOper.Buffer(bufferDistence) as IPolygon;
// pFeatureBuffer.Shape = pPolygon;
// //pFeatureBuffer.set_Value(iFieldAttribute, pFeature.OID);
// pFeatureCursor.InsertFeature(pFeatureBuffer);
// pFeature = pEnumfeature.Next();
//}
//pFeatureCursor.Flush();
//ML修改代码
IGeometryCollection inputGeom = new GeometryBagClass();
IGeometryBag geomBag = inputGeom as IGeometryBag;
object missing = Type.Missing;
while (pFeature != null)
{
inputGeom.AddGeometry(pFeature.ShapeCopy, ref missing, ref missing);
pFeature = pEnumfeature.Next();
}
IBufferConstruction bfCon = new BufferConstructionClass();
IBufferConstructionProperties bfConProp = bfCon as IBufferConstructionProperties;
ISpatialReferenceFactory spatialRefFac = new SpatialReferenceEnvironmentClass();
bfConProp.EndOption = esriBufferConstructionEndEnum.esriBufferRound;
bfConProp.SideOption = esriBufferConstructionSideEnum.esriBufferFull;
bfConProp.ExplodeBuffers = false;
bfConProp.OutsideOnly = false;
bfConProp.GenerateCurves = true;
bfConProp.UnionOverlappingBuffers = true;
bfConProp.DensifyDeviation = -1;
IGeometryCollection outGeom = new GeometryBagClass();
bfCon.ConstructBuffers(inputGeom as IEnumGeometry, bufferDistence, outGeom);
for (int i = 0; i < outGeom.GeometryCount; i++)
{
newFeat = pFeatureclass.CreateFeature();
newFeat.Shape = outGeom.get_Geometry(i);
newFeat.Store();
}
newFeat = null;
//添加图层进map
IFeatureLayer pOutputFeatureLayer;
pOutputFeatureLayer = new FeatureLayerClass();
pOutputFeatureLayer.FeatureClass = pFeatureclass;
pOutputFeatureLayer.Name = pFeatureclass.AliasName;
m_mapControl.Map.AddLayer(pOutputFeatureLayer);
this.Dispose();
}
