ArcGIS AddIn开发之：固定距离+节点生成点

private int generatePntsByFeature(IFeature pFeature,IFeatureLayer pPointLyr,int pntid)
{
IFeatureCursor pPointCursor = pPointLyr.FeatureClass.Insert(true);
IWorkspaceEdit pwsEdit = (IWorkspaceEdit)((IDataset)pPointLyr.FeatureClass).Workspace;
pwsEdit.StartEditing(false);
pwsEdit.StartEditOperation();
string leixing = "", lnxuhao = "", suozaixiangzhen = "", leftorright = "", rivername = "", riverduanname = "", rvzimu = "", lxzimu = "";
if (chkJiaShan.Checked)  //此处为某项目的特殊需求，用以实现对该项目相关属性的写入
{
leixing = cmbLineType.Items[cmbLineType.SelectedIndex].ToString();
lnxuhao = pFeature.get_Value(pFeature.Fields.FindField("线段编号")).ToString();
suozaixiangzhen = pFeature.get_Value(pFeature.Fields.FindField("所在乡镇")).ToString();

leftorright = pFeature.get_Value(pFeature.Fields.FindField(cmbLeftOrRight.Items[cmbLeftOrRight.SelectedIndex].ToString())).ToString();
rivername = pFeature.get_Value(pFeature.Fields.FindField(cmbRiverName.Items[cmbRiverName.SelectedIndex].ToString())).ToString();
riverduanname = pFeature.get_Value(pFeature.Fields.FindField(cmbRiverDuanName.Items[cmbRiverDuanName.SelectedIndex].ToString())).ToString();
NCPinYinHelpercs ncp = new NCPinYinHelpercs();
rvzimu = rivername;
lxzimu = leixing;
//lxzimu = ncp.GetShortPinyin(leixing);
if (leixing != "中心线")
{
//lxzimu = ncp.GetShortPinyin(leftorright.Substring(0, 1)) + "-" + lxzimu;
lxzimu = leftorright.Substring(0, 1) + "-" + lxzimu;
}
}

string pntArray = "";

if (rdVertex.Checked)  <span style="font-family:Microsoft YaHei;">//根据线的节点生成点</span>
{
IPointCollection pntCol = (IPointCollection)pFeature.Shape;
for (int i = 0; i < pntCol.PointCount; i++)
{
if (i == 0 && !chkOverLayPoint.Checked)
{
//检查首点是否重复
ISpatialFilter psf = new SpatialFilterClass();
ITopologicalOperator ptptmp =pntCol.get_Point(0) as ITopologicalOperator;
IGeometry pgm = ptptmp.Buffer(0.2);
psf.Geometry = pgm;
psf.SpatialRel = esriSpatialRelEnum.esriSpatialRelEnvelopeIntersects;
IFeatureCursor ptmpCursor = pPointLyr.FeatureClass.Search(psf, false);
IFeature ptmpFeature = ptmpCursor.NextFeature();
if (ptmpFeature != null)
{
pntArray = "," + ptmpFeature.get_Value(ptmpFeature.Fields.FindField("信息点编号")).ToString();
continue;
}
}

IFeatureBuffer pntFeatureBuffer = pPointLyr.FeatureClass.CreateFeatureBuffer();
pntFeatureBuffer.Shape = pntCol.get_Point(i);

if (chkJiaShan.Checked)  //项目需求，对属性的写入
{
string nid = rvzimu + "-" + lxzimu + "-D" + pntid.ToString();
pntArray = pntArray + "," + nid;
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("信息点编号"), nid);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("源序号"), leixing + "_" + lnxuhao);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("所在乡镇"), suozaixiangzhen);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河道名称"), rivername);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河段名称"), riverduanname);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("线段类型"), leixing);
}
else
{
//编号写入一个默认的字段中
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("PointId"),pntid);
}

pPointCursor.InsertFeature(pntFeatureBuffer);
pntid++;
}
pPointCursor.Flush();
}
else if (rdEqualDis.Checked)  //按照一定间距生成节点
{
IPolyline pln = pFeature.Shape as IPolyline;
IPoint pnt = null;
for (double i = SplitDis; i < pln.Length; i = i + SplitDis)
{
if (i == 0)
{
if (!chkOverLayPoint.Checked)
{
//检查首点是否重复时
//检查首点是否重复
ISpatialFilter psf = new SpatialFilterClass();
ITopologicalOperator ptptmp =pln.FromPoint as ITopologicalOperator;
IGeometry pgm = ptptmp.Buffer(0.2);
psf.Geometry = pgm;
psf.SpatialRel = esriSpatialRelEnum.esriSpatialRelEnvelopeIntersects;
IFeatureCursor ptmpCursor = pPointLyr.FeatureClass.Search(psf, false);
IFeature ptmpFeature = ptmpCursor.NextFeature();
if (ptmpFeature != null)
{
pntArray = "," + ptmpFeature.get_Value(ptmpFeature.Fields.FindField("信息点编号")).ToString();
continue;
}
else
{
//不包含，取首点
pnt = pln.FromPoint;
}
}
else
{
//不检查时，直接取首点
pnt = pln.FromPoint;
}
}
else if(i>0 && (pln.Length - i < 0.2 * SplitDis))
{
//此代码的含义为最后一个点时,如果点很接近终点,则直接使用终点,不进行操作
break;
}
else
{
pnt = getpntAtDis(pln, i);
}

string nid;
IFeatureBuffer pNewFeature = pPointLyr.FeatureClass.CreateFeatureBuffer();

nid = rvzimu + "-" + lxzimu + "-D" + pntid.ToString();

pNewFeature.Shape = pnt;
pNewFeature.set_Value(pNewFeature.Fields.FindField("信息点编号"), nid);
pNewFeature.set_Value(pNewFeature.Fields.FindField("源序号"), leixing + "-" + lnxuhao);
pNewFeature.set_Value(pNewFeature.Fields.FindField("所在乡镇"), suozaixiangzhen);
pNewFeature.set_Value(pNewFeature.Fields.FindField("河道名称"), rivername);
pNewFeature.set_Value(pNewFeature.Fields.FindField("河段名称"), riverduanname);
//pNewFeature.set_Value(pNewFeature.Fields.FindField("线段类型"), leixing);

pPointCursor.InsertFeature(pNewFeature);
pntArray = pntArray + "," + nid;
pntid++;
}

//处理终点
pnt = pln.ToPoint;
string nid2;
IFeatureBuffer pNewFeature2 = pPointLyr.FeatureClass.CreateFeatureBuffer();

nid2 = rvzimu + "-" + lxzimu + "-D" + pntid.ToString();

pNewFeature2.Shape = pnt;
pNewFeature2.set_Value(pNewFeature2.Fields.FindField("信息点编号"), nid2);
pNewFeature2.set_Value(pNewFeature2.Fields.FindField("源序号"), leixing + "-" + lnxuhao);
pNewFeature2.set_Value(pNewFeature2.Fields.FindField("所在乡镇"), suozaixiangzhen);
pNewFeature2.set_Value(pNewFeature2.Fields.FindField("河道名称"), rivername);
pNewFeature2.set_Value(pNewFeature2.Fields.FindField("河段名称"), riverduanname);
//pNewFeature.set_Value(pNewFeature.Fields.FindField("线段类型"), leixing);

pPointCursor.InsertFeature(pNewFeature2);
pntArray = pntArray + "," + nid2;
pntid++;

pPointCursor.Flush();
}
else if (rdMix.Checked)  //节点+固定距离生成节点模式
{
IPointCollection pntCol = (IPointCollection)pFeature.Shape;
IPolyline pln = pFeature.Shape as IPolyline;
//先生成节点序列,两两判断节点间距离，如果过长，则生成splitdis的等分点
IPoint CurrentPoint, PrePoint;
for (int i = 0; i < pntCol.PointCount; i++)
{
if (i == 0 && !chkOverLayPoint.Checked)
{
//检查首点是否重复
ISpatialFilter psf = new SpatialFilterClass();
ITopologicalOperator ptptmp = pntCol.get_Point(0) as ITopologicalOperator;
IGeometry pgm = ptptmp.Buffer(0.2);
psf.Geometry = pgm;
psf.SpatialRel = esriSpatialRelEnum.esriSpatialRelEnvelopeIntersects;
IFeatureCursor ptmpCursor = pPointLyr.FeatureClass.Search(psf, false);
IFeature ptmpFeature = ptmpCursor.NextFeature();
if (ptmpFeature != null)
{
pntArray = "," + ptmpFeature.get_Value(ptmpFeature.Fields.FindField("信息点编号")).ToString();
continue;
}
}

IFeatureBuffer pntFeatureBuffer;
string nid;
//是否需要增加中点
if (i > 0)
{
CurrentPoint = pntCol.get_Point(i);
PrePoint = pntCol.get_Point(i - 1);
IPointCollection tmpPolyline = new PolylineClass();
tmpPolyline.AddPoint(PrePoint);
tmpPolyline.AddPoint(CurrentPoint);

double lenght = Math.Sqrt((CurrentPoint.X - PrePoint.X) * (CurrentPoint.X - PrePoint.X) + (CurrentPoint.Y - PrePoint.Y) * (CurrentPoint.Y - PrePoint.Y));
//此时需要增加中点
for (int zi = 0; zi < Math.Round(Math.Round(lenght / SplitDis) - 1);zi++ )
{
IPoint pnt = getpntAtDis((IPolyline)tmpPolyline, (zi+1)*SplitDis);
nid = rvzimu + "-" + lxzimu + "-D" + pntid.ToString();
pntArray = pntArray + "," + nid;

pntFeatureBuffer = pPointLyr.FeatureClass.CreateFeatureBuffer();
pntFeatureBuffer.Shape = pnt;
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("信息点编号"), nid);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("源序号"), leixing + "_" + lnxuhao);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("所在乡镇"), suozaixiangzhen);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河道名称"), rivername);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河段名称"), riverduanname);
//pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("线段类型"), leixing);
pPointCursor.InsertFeature(pntFeatureBuffer);
pntid++;
}
}

nid = rvzimu + "-" + lxzimu + "-D" + pntid.ToString();
pntArray = pntArray + "," + nid;

pntFeatureBuffer = pPointLyr.FeatureClass.CreateFeatureBuffer();
pntFeatureBuffer.Shape = pntCol.get_Point(i);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("信息点编号"), nid);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("源序号"), leixing + "_" + lnxuhao);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("所在乡镇"), suozaixiangzhen);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河道名称"), rivername);
pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("河段名称"), riverduanname);
//pntFeatureBuffer.set_Value(pntFeatureBuffer.Fields.FindField("线段类型"), leixing);
pPointCursor.InsertFeature(pntFeatureBuffer);
pntid++;
}
pPointCursor.Flush();
}
else
{

}
string ssstmp = pntArray.Remove(0,1);
pFeature.set_Value(pFeature.Fields.FindField("点序列"),ssstmp); //去掉第一个,
pwsEdit.StopEditOperation();
pwsEdit.StopEditing(true);
return pntid;
}

private IPoint getpntAtDis(IPolyline pln, double dis)
{
IConstructPoint pCPoint = new PointClass();
pCPoint.ConstructAlong(pln, esriSegmentExtension.esriNoExtension, dis, false);
return (IPoint)pCPoint;
}