/// <summary>
/// 获取多边形的所有环
/// </summary>
/// <param name="polygon">多边形</param>
/// <returns></returns>
public static Dictionary <string, IRing> GetAllRings(IPolygon polygon)
{
Dictionary <string, IRing> rings = new Dictionary <string, IRing>();
int i = 0;
foreach (IRing ring in PolygonHelper.GetExteriorRings(polygon))
{
int j = 0;
i++;
rings.Add("外环" + i.ToString(), ring);
foreach (IRing interring in PolygonHelper.GetInteriorRingsByExterior(ring, polygon))
{
j++;
rings.Add("外环" + i.ToString() + "内环" + j.ToString(), interring);
}
}
return(rings);
}
//
//输出外环面 shape
public bool OutPutPolygonExteriorRing(IFeatureClass featclass, string outShapeFilePath, bool IsGetExtRingOfHaveInnerRing)
{
bool rbc = false;
if (System.IO.File.Exists(outShapeFilePath) == true)
{ //输出Shape文件
LocalShapeFileOperator delshpOp = new LocalShapeFileOperator();
delshpOp.LocalShapePathFileName = outShapeFilePath;
delshpOp.DeleteShapeFile();
delshpOp.Dispose();
}
esriGeometryType geoType = featclass.ShapeType;
//创建新的Shape文件
LocalShapeFileOperator shpOp = new LocalShapeFileOperator();
shpOp.LocalShapePathFileName = outShapeFilePath;
string dir = shpOp.getDir(outShapeFilePath);
string name = shpOp.getFileName(outShapeFilePath);
ShapefileWorkspaceFactoryClass objwsf = new ShapefileWorkspaceFactoryClass();
IWorkspace objws = objwsf.OpenFromFile(dir, 0);
IFeatureWorkspace feaureWS = objws as IFeatureWorkspace;
//设置投影
ISpatialReference sr = (featclass as IGeoDataset).SpatialReference;
shpOp.ShapeSpatialReference = sr;
//设置shp文件的oid字段和几何字段
if (IsObjGeo == false)
{
if (featclass.HasOID == true)
{
this.OIDFieldName = featclass.OIDFieldName;
}
this.GeometryFieldName = featclass.ShapeFieldName;
}
shpOp.OIDFieldName = this.OIDFieldName;
shpOp.GeometryFieldName = this.GeometryFieldName;
//创建要素类
IFeatureClass fc = shpOp.CreateFeatureClass(feaureWS, name, esriFeatureType.esriFTSimple, geoType);
if (fc != null)
{
TokayWorkspace.ComRelease(fc);
fc = null;
rbc = true;
}
TokayWorkspace.ComRelease(objws);
feaureWS = null;
objws = null;
objwsf = null;
//拷贝字段结构
IFeatureClass Dfeatclass = shpOp.getIFeatureClass();
ZhFeatureClass Szhfeatclass = new ZhPointFeatureClass(featclass);
Szhfeatclass.CopyFieldsToObjectFeatureClass(Dfeatclass);
//拷贝几何对象和属性数据
ZhFeature Szhfeat = null;
IFeatureBuffer DfeatBuffer = null;
IFeatureCursor featCurInsert = Dfeatclass.Insert(true);
//获取总要素个数
int fIndex = 0;
int tmpFCount = Szhfeatclass.FeatureClass.FeatureCount(null);
frmProgressBar1 pb = new frmProgressBar1();
pb.Text = "正在输出shp文件...";
pb.Caption1.Text = "正在输出shp文件...";
pb.progressBar1.Maximum = tmpFCount + 1;
pb.progressBar1.Value = 0;
pb.Show(this.ParentForm);
Application.DoEvents();
object refobj = Type.Missing;
IPolygon s_p = null;
IRing[] ExtRingArray = null;
IRing[] InnerRingArray = null;
IFeatureCursor featcur = Szhfeatclass.FeatureClass.Search(null, false);
IFeature feat = featcur.NextFeature();
while (feat != null)
{
fIndex += 1;
if (fIndex % 200 == 0)
{
pb.Caption1.Text = "已输出要素个数:" + fIndex.ToString() + "/总" + tmpFCount.ToString();
pb.progressBar1.Value = fIndex;
Application.DoEvents();
featCurInsert.Flush();
}
s_p = feat.ShapeCopy as IPolygon;
//获取外环面几何对象
ExtRingArray = PolygonHelper.GetExteriorRings(s_p);
if (ExtRingArray != null && ExtRingArray.Length > 0)
{
foreach (IRing r in ExtRingArray)
{
if (IsGetExtRingOfHaveInnerRing == true)
{
InnerRingArray = PolygonHelper.GetInteriorRingsByExterior(r, s_p);
if (InnerRingArray != null && InnerRingArray.Length > 0)
{ //有内环
//外环构面并输出保存
DfeatBuffer = Dfeatclass.CreateFeatureBuffer();
PolygonClass pclass = new PolygonClass();
pclass.AddGeometry(r, ref refobj, ref refobj);
pclass.SimplifyPreserveFromTo();
pclass.SpatialReference = sr;
DfeatBuffer.Shape = pclass;
//拷贝属性数据
Szhfeat = new ZHFeaturePoint(feat);
Szhfeat.CopyField(ref DfeatBuffer);
featCurInsert.InsertFeature(DfeatBuffer);
//
}
}
else
{
//外环构面并输出保存
DfeatBuffer = Dfeatclass.CreateFeatureBuffer();
PolygonClass pclass = new PolygonClass();
pclass.AddGeometry(r, ref refobj, ref refobj);
pclass.SimplifyPreserveFromTo();
pclass.SpatialReference = sr;
DfeatBuffer.Shape = pclass;
//拷贝属性数据
Szhfeat = new ZHFeaturePoint(feat);
Szhfeat.CopyField(ref DfeatBuffer);
featCurInsert.InsertFeature(DfeatBuffer);
//
}
}
}
feat = featcur.NextFeature();
}
featCurInsert.Flush();
TokayWorkspace.ComRelease(featcur);
featcur = null;
TokayWorkspace.ComRelease(featCurInsert);
featCurInsert = null;
rbc = true;
pb.Close();
pb.Dispose();
pb = null;
return(rbc);
}