private IGeometry GetGeometryByCoor()
{
//直接获得坐标范围
double dblMinX = 0;
double dblMaxX = 0;
double dblMinY = 0;
double dblMaxY = 0;
double.TryParse(this.txtMinX.Text, out dblMinX);
double.TryParse(this.txtMaxX.Text, out dblMaxX);
double.TryParse(this.txtMinY.Text, out dblMinY);
double.TryParse(this.txtMaxY.Text, out dblMaxY);
//定义范围
IPointCollection pPntCollection = new PolygonClass();
object obj = System.Type.Missing;
IPoint pPnt1 = new PointClass();
pPnt1.PutCoords(dblMinX, dblMinY);
pPntCollection.AddPoint(pPnt1, ref obj, ref obj);
IPoint pPnt2 = new PointClass();
pPnt2.PutCoords(dblMaxX, dblMinY);
pPntCollection.AddPoint(pPnt2, ref obj, ref obj);
IPoint pPnt3 = new PointClass();
pPnt3.PutCoords(dblMaxX, dblMaxY);
pPntCollection.AddPoint(pPnt3, ref obj, ref obj);
IPoint pPnt4 = new PointClass();
pPnt4.PutCoords(dblMinX, dblMaxY);
pPntCollection.AddPoint(pPnt4, ref obj, ref obj);
//
IPolygon2 pPolygon2 = pPntCollection as IPolygon2;
pPolygon2.Close();
if (pPolygon2.IsEmpty)
{
return(null);
}
if (m_pMap != null && m_pMap.SpatialReference != null)
{
pPolygon2.Project(m_pMap.SpatialReference);
}
return(pPolygon2 as IGeometry);
}
//元素方式
//private void addGeometryEle(IPolygon pPolygon)
//{
// ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();
// ISimpleLineSymbol pLineSymbol = new SimpleLineSymbolClass();
// IPolygonElement pPolygonEle = new PolygonElementClass();
// try
// {
// //颜色对象
// IRgbColor pRGBColor = new RgbColorClass();
// pRGBColor.UseWindowsDithering = false;
// ISymbol pSymbol = (ISymbol)pFillSymbol;
// pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
// pRGBColor.Red = 255;
// pRGBColor.Green = 170;
// pRGBColor.Blue = 0;
// pLineSymbol.Color = pRGBColor;
// pLineSymbol.Width = 0.8;
// pLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
// pFillSymbol.Outline = pLineSymbol;
// pFillSymbol.Color = pRGBColor;
// pFillSymbol.Style = esriSimpleFillStyle.esriSFSDiagonalCross;
// IElement pEle = pPolygonEle as IElement;
// pEle.Geometry = pPolygon as IGeometry;
// pEle.Geometry.SpatialReference = pPolygon.SpatialReference;
// (pEle as IFillShapeElement).Symbol = pFillSymbol;
// (pEle as IElementProperties).Name="ImpExtentOutMap";
// (m_Hook.ArcGisMapControl.Map as IGraphicsContainer).AddElement(pEle, 0);
// (m_Hook.ArcGisMapControl.Map as IActiveView).PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
// IGraphicsContainer pGra = m_Hook.ArcGisMapControl.Map as IGraphicsContainer;
// IActiveView pAv = pGra as IActiveView;
// pGra.Reset();
// IElement pEle2 = pGra.Next();
// while (pEle2 != null)
// {
// if ((pEle2 as IElementProperties).Name == "ImpExtentOutMap")
// {
// //pGra.DeleteElement(pEle);
// //pGra.Reset();
// }
// pEle2 = pGra.Next();
// }
// }
// catch (Exception ex)
// {
// MessageBox.Show("绘制导入范围出错:" + ex.Message, "提示");
// pFillSymbol = null;
// }
//}
#region
/// <summary>
/// 从文件路径获得一个PolyGon
/// </summary>
/// <param name="path">文件全路径</param>
/// <returns></returns>
private IPolygon GetPolyGonFromFile(string path)
{
IPolygon pGon = null;
if (path.EndsWith(".mdb"))
{
string errmsg = "";
IWorkspaceFactory pwf = new AccessWorkspaceFactoryClass();
IWorkspace pworkspace = pwf.OpenFromFile(path, 0);
IEnumDataset pEnumdataset = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureClass);
pEnumdataset.Reset();
IDataset pDataset = pEnumdataset.Next();
while (pDataset != null)
{
IFeatureClass pFeatureclass = pDataset as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset = pEnumdataset.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset = pEnumdataset.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset = pEnumdataset.Next();
continue;
}
else
{
break;
}
}
}
}
if (pGon == null)
{
IEnumDataset pEnumdataset1 = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);
pEnumdataset1.Reset();
pDataset = pEnumdataset1.Next();
while (pDataset != null)
{
IFeatureDataset pFeatureDataset = pDataset as IFeatureDataset;
IEnumDataset pEnumDataset2 = pFeatureDataset.Subsets;
pEnumDataset2.Reset();
IDataset pDataset1 = pEnumDataset2.Next();
while (pDataset1 != null)
{
if (pDataset1 is IFeatureClass)
{
IFeatureClass pFeatureclass = pDataset1 as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset1 = pEnumDataset2.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset1 = pEnumDataset2.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset1 = pEnumDataset2.Next();
continue;
}
else
{
break;
}
}
}
}
}
if (pGon != null)
{
break;
}
pDataset = pEnumdataset1.Next();
}
}
if (pGon == null)
{
if (errmsg != "")
{
MessageBox.Show(errmsg, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("请选择一个包含面要素和线要素的文件", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
return(pGon);
}
}
else if (path.EndsWith(".shp"))
{
IWorkspaceFactory pwf = new ShapefileWorkspaceFactoryClass();
string filepath = System.IO.Path.GetDirectoryName(path);
string filename = path.Substring(path.LastIndexOf("\\") + 1);
IFeatureWorkspace pFeatureworkspace = (IFeatureWorkspace)pwf.OpenFromFile(filepath, 0);
IFeatureClass pFeatureclass = pFeatureworkspace.OpenFeatureClass(filename);
if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
MessageBox.Show("选择的线要素不能构成封闭多边形！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return(null);
}
}
}
else
{
MessageBox.Show("请选择一个面或者线要素文件！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return(null);
}
}
else if (path.EndsWith(".txt"))
{
string txtpath = path;
System.IO.StreamReader smRead = new System.IO.StreamReader(txtpath, System.Text.Encoding.Default); //设置路径
string line;
pGon = new PolygonClass();
IPointCollection pc = pGon as IPointCollection;
double x, y;
while ((line = smRead.ReadLine()) != null)
{
if (line.IndexOf(",") > 0)
{
try
{
x = double.Parse(line.Substring(0, line.IndexOf(",")));
y = double.Parse(line.Substring(line.IndexOf(",") + 1));
}
catch
{
MessageBox.Show("文本文件格式不正确！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
smRead.Close();
return(null);
}
IPoint tmpPoint = new ESRI.ArcGIS.Geometry.Point();
tmpPoint.X = x;
tmpPoint.Y = y;
object ep = System.Reflection.Missing.Value;
pc.AddPoint(tmpPoint, ref ep, ref ep);
}
}
smRead.Close();
ICurve pCurve = pGon as ICurve;
if (pCurve.IsClosed == false)
{
if (pCurve.IsClosed == false)
{
//自动闭合
IPolygon2 pPolygon2 = pGon as IPolygon2;
pPolygon2.Close();
}
}
}
return(pGon);
}
