Пример #1
0
        public IPolygon CreatePolygon(IntPtr intptr_0)
        {
            IPolygon polygonClass = new Polygon() as IPolygon;
            int      num          = TabRead._mitab_c_get_parts(intptr_0);
            object   value        = Missing.Value;

            for (int i = 0; i < num; i++)
            {
                int   num1      = TabRead._mitab_c_get_vertex_count(intptr_0, i);
                IRing ringClass = new ESRI.ArcGIS.Geometry.Ring() as IRing;
                for (int j = 0; j < num1; j++)
                {
                    IPoint pointClass = new Point()
                    {
                        X = TabRead._mitab_c_get_vertex_x(intptr_0, i, j),
                        Y = TabRead._mitab_c_get_vertex_y(intptr_0, i, j)
                    };
                    (ringClass as IPointCollection).AddPoint(pointClass, ref value, ref value);
                }
                ringClass.Close();
                (polygonClass as IGeometryCollection).AddGeometry(ringClass, ref value, ref value);
            }
            return(polygonClass);
        }
Пример #2
0
        private Image SymbolToBitmap(IGradientFillSymbol iSymbol, int iStyle, int iWidth, int iHeight)
        {
            IntPtr    iHDC      = new IntPtr();
            Bitmap    iBitmap   = new Bitmap(iWidth, iHeight);
            Graphics  iGraphics = System.Drawing.Graphics.FromImage(iBitmap);
            tagRECT   itagRECT;
            IEnvelope iEnvelope = new EnvelopeClass() as IEnvelope;
            IDisplayTransformation iDisplayTransformation;
            IPoint iPoint;
            IGeometryCollection iPolyline;
            IGeometryCollection iPolygon;
            IRing iRing;
            ISegmentCollection iSegmentCollection;
            IGeometry          iGeometry = null;
            object             Missing   = Type.Missing;

            iEnvelope.PutCoords(0, 0, iWidth, iHeight);
            itagRECT.left          = 0;
            itagRECT.right         = iWidth;
            itagRECT.top           = 0;
            itagRECT.bottom        = iHeight;
            iDisplayTransformation = new DisplayTransformationClass();
            iDisplayTransformation.VisibleBounds = iEnvelope;
            iDisplayTransformation.Bounds        = iEnvelope;
            iDisplayTransformation.set_DeviceFrame(ref itagRECT);
            iDisplayTransformation.Resolution = iGraphics.DpiX / 100000;
            iHDC = iGraphics.GetHdc();
            //获取Geometry;

            if (iSymbol is ESRI.ArcGIS.Display.IMarkerSymbol)
            {
                switch (iStyle)
                {
                case 0:
                    iPoint = new ESRI.ArcGIS.Geometry.Point();
                    iPoint.PutCoords(iWidth / 2, iHeight / 2);
                    iGeometry = iPoint;
                    break;

                default:
                    break;
                }
            }
            else
            {
                if (iSymbol is ESRI.ArcGIS.Display.ILineSymbol)
                {
                    iSegmentCollection = new ESRI.ArcGIS.Geometry.Path() as ISegmentCollection;
                    iPolyline          = new ESRI.ArcGIS.Geometry.Polyline() as IGeometryCollection;
                    switch (iStyle)
                    {
                    case 0:
                        iSegmentCollection.AddSegment(CreateLine(0, iHeight / 2, iWidth, iHeight / 2) as ISegment, ref Missing, ref Missing);

                        iPolyline.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
                        iGeometry = iPolyline as IGeometry;
                        break;

                    case 1:
                        iSegmentCollection.AddSegment(CreateLine(0, iHeight / 4, iWidth / 4, 3 * iHeight / 4) as ISegment, ref Missing, ref Missing);
                        iSegmentCollection.AddSegment(CreateLine(iWidth / 4, 3 * iHeight / 4, 3 * iWidth / 4, iHeight / 4) as ISegment, ref Missing, ref Missing);
                        iSegmentCollection.AddSegment(CreateLine(3 * iWidth / 4, iHeight / 4, iWidth, 3 * iHeight / 4) as ISegment, ref Missing, ref Missing);
                        iPolyline.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
                        iGeometry = iPolyline as IGeometry;
                        break;

                    default:
                        break;
                    }
                }
                else
                if (iSymbol is ESRI.ArcGIS.Display.IFillSymbol)
                {
                    iSegmentCollection = new ESRI.ArcGIS.Geometry.Ring() as ISegmentCollection;
                    iPolygon           = new ESRI.ArcGIS.Geometry.Polygon() as IGeometryCollection;
                    switch (iStyle)
                    {
                    case 0:
                        iSegmentCollection.AddSegment(CreateLine(5, iHeight - 5, iWidth - 6, iHeight - 5) as ISegment, ref Missing, ref Missing);
                        iSegmentCollection.AddSegment(CreateLine(iWidth - 6, iHeight - 5, iWidth - 6, 6) as ISegment, ref Missing, ref Missing);
                        iSegmentCollection.AddSegment(CreateLine(iWidth - 6, 6, 5, 6) as ISegment, ref Missing, ref Missing);
                        iRing = iSegmentCollection as IRing;
                        iRing.Close();
                        iPolygon.AddGeometry(iSegmentCollection as IGeometry, ref Missing, ref Missing);
                        iGeometry = iPolygon as IGeometry;
                        break;

                    default:
                        break;
                    }
                }
                else
                if (iSymbol is ESRI.ArcGIS.Display.ISimpleTextSymbol)
                {
                    switch (iStyle)
                    {
                    case 0:
                        iPoint = new ESRI.ArcGIS.Geometry.Point();
                        iPoint.PutCoords(iWidth / 2, iHeight / 2);
                        iGeometry = iPoint;
                        break;

                    default:
                        break;
                    }
                }
            }////////////////////////
            if (iGeometry == null)
            {
                MessageBox.Show("几何对象不符合!", "错误");
                return(null);
            }
            ISymbol pOutputSymbol = iSymbol as ISymbol;

            pOutputSymbol.SetupDC(iHDC.ToInt32(), iDisplayTransformation);
            pOutputSymbol.Draw(iGeometry);
            pOutputSymbol.ResetDC();
            iGraphics.ReleaseHdc(iHDC);
            iGraphics.Dispose();
            return(iBitmap);
        }