Graphics Loaded from File - Issue

KeithAnderson — Sun, 30 Jan 2011 01:25:19 GMT

Folks

I am loading Graphics from a ASCII text file. The simple rectangle has 5 coord that are valid.
The Beginning and Ending points are running off the left margin of the map.
Please open the jpg below for example.

Any suggestions on how to fix are appreciated.

Keith Anderson

Re: Graphics Loaded from File - Issue

DominiqueBroux — Mon, 31 Jan 2011 09:15:04 GMT

At first glance, I would say that there is an issue with the geoemtry you created by code. But difficult to guess which one.
We would need more infos on how it's done.

Re: Graphics Loaded from File - Issue

KeithAnderson — Mon, 31 Jan 2011 18:24:20 GMT

DBroux

This was altered from existing forum thread:

        private void SaveGraphics_Click(object sender, RoutedEventArgs e)
        {
          try
          {
            //Save the graphics layer
            GraphicsLayer graphicsLayer = MyMap.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
            GraphicCollection pGC = graphicsLayer.Graphics;

            SaveFileDialog sfd = new SaveFileDialog();
            sfd.DefaultExt = ".txt";
            sfd.Filter = "Text Files|*.txt|All Files|*.*";
            sfd.FilterIndex = 1;
            sfd.ShowDialog();

            using (Stream pStream = sfd.OpenFile())
            {
              StreamWriter pStreamWriter = new StreamWriter(pStream);

              foreach (Graphic g in pGC)
              {
                if (g.Geometry is ESRI.ArcGIS.Client.Geometry.MapPoint)
                {
                  //Create a row in a csv file
                  MapPoint pPoint = (MapPoint)g.Geometry;
                  pStreamWriter.WriteLine("Point, " + pPoint.X.ToString() + ", " + pPoint.Y.ToString());
                }

                if (g.Geometry is ESRI.ArcGIS.Client.Geometry.Polyline)
                {
                  //Create a row in a csv file

                  ESRI.ArcGIS.Client.Geometry.Polyline PL = new ESRI.ArcGIS.Client.Geometry.Polyline();
                  PL = (ESRI.ArcGIS.Client.Geometry.Polyline)g.Geometry;
                  ESRI.ArcGIS.Client.Geometry.PointCollection PC = new ESRI.ArcGIS.Client.Geometry.PointCollection();
                  for (int i = 0; i < PL.Paths.Count; i++)
                     foreach (var mp in PL.Paths)
                        PC.Add(mp);

                  //ESRI.ArcGIS.Client.Geometry.Polyline pPolyline = (ESRI.ArcGIS.Client.Geometry.Polyline)g.Geometry;
                  //ESRI.ArcGIS.Client.Geometry.PointCollection[] pPC = pPolyline.Paths[0];
                  pStreamWriter.Write("Polyline, ");

                  foreach (MapPoint p in PC)
                  {
                    pStreamWriter.Write(p.X.ToString() + ", " + p.Y.ToString() + ",");
                  }
                  pStreamWriter.WriteLine();
                }

                if (g.Geometry is ESRI.ArcGIS.Client.Geometry.Polygon)
                {
                  //Create a row in a csv file

                  ESRI.ArcGIS.Client.Geometry.Polygon PG = new ESRI.ArcGIS.Client.Geometry.Polygon();
                  PG = (ESRI.ArcGIS.Client.Geometry.Polygon)g.Geometry;
                  ESRI.ArcGIS.Client.Geometry.PointCollection PC = new ESRI.ArcGIS.Client.Geometry.PointCollection();
                  for (int i = 0; i < PG.Rings.Count; i++)
                    foreach (var mp in PG.Rings)
                      PC.Add(mp);

                  //ESRI.ArcGIS.Client.Geometry.Polygon pPolygon = (ESRI.ArcGIS.Client.Geometry.Polygon)g.Geometry;
                  //ESRI.ArcGIS.Client.Geometry.PointCollection[] pPC = pPolygon.Rings[0];
                  pStreamWriter.Write("Polygon, ");

                  foreach (MapPoint p in PC)
                  {
                    pStreamWriter.Write(p.X.ToString() + "," + p.Y.ToString() + " ");
                  }
                  pStreamWriter.WriteLine();
                }
              }
              pStreamWriter.Close();
              pStream.Close();
            }
          }
          catch
          {
            MessageBox.Show("       Error saving file\n Contact GIS for assistance", "Error", MessageBoxButton.OK);
          }
        }

        private void OpenGraphics_Click(object sender, RoutedEventArgs e)
        {
          try
          {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = false;
            ofd.Filter = "Text Files|*.txt|All Files|*.*";
            ofd.FilterIndex = 1;
            ofd.ShowDialog();

            //code to open the file
            StreamReader pStreamReader = ofd.File.OpenText();
            GraphicsLayer graphicsLayer = MyMap.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
            Graphic g;
            double X;
            double Y;
            //read in each row and then create the graphic
            string Shape = pStreamReader.ReadLine();
            while (Shape != null)
            {
              if (Shape.Contains("Point"))
              {
                string[] s = Shape.Split(',');
                //create point graphic
                X = System.Convert.ToDouble(s[1]);
                Y = System.Convert.ToDouble(s[2]);
                MapPoint point = new MapPoint(X, Y);

                g = new ESRI.ArcGIS.Client.Graphic()
                {
                  Geometry = point,
                 //Symbol = DefaultMarkerSymbol,
                  Symbol = LayoutRoot.Resources["DefaultPointSymbol"] as SimpleMarkerSymbol,
                };
                graphicsLayer.Graphics.Add(g);
              }

              if (Shape.Contains("Polygon"))
              {
                string s = Shape.Remove(0, 10);
                //string s2 = s.Replace(" ", "");
                //string s3 = s2.Replace(",-", " -");
                string s4 = s.TrimEnd(',');
                //string s5 = "43589.006839111,175166.477333516 443942.241040781,175162.76146169 444885.157133937,175152.837597027 444878.470467523,173975.940672606 444786.990007445,174016.332324103 444595.920507684,174100.695344359 444472.40139778,174155.232636854 444389.013769269,174192.05080469 444249.601318449,174253.605471611 444097.723997518,174320.663736433 444018.592922196,174355.602642938 443817.821998268,174444.248791099 443654.861694276,174516.200746939 443580.473719686,174549.045169443 443582.007181197,175166.560010523 443589.006839111,175166.477333516";

                //create polygon graphic
                PointCollectionConverter pPointCollectionConverter = new PointCollectionConverter();
                //get the point collection and add it to a polygon geometry
                ESRI.ArcGIS.Client.Geometry.PointCollection pPCPolygon = new ESRI.ArcGIS.Client.Geometry.PointCollection();
                pPCPolygon = (ESRI.ArcGIS.Client.Geometry.PointCollection)pPointCollectionConverter.ConvertFromString(s4);

                ESRI.ArcGIS.Client.Geometry.Polygon polygon = new ESRI.ArcGIS.Client.Geometry.Polygon();
                polygon.Rings.Add(pPCPolygon);

                g = new ESRI.ArcGIS.Client.Graphic()
                {
                  Geometry = polygon,
                  //Symbol = DefaultFillSymbol,
                  Symbol = LayoutRoot.Resources["DefaultFillSymbol"] as FillSymbol,
                };
                graphicsLayer.Graphics.Add(g);
              }

              if (Shape.Contains("Polyline"))
              {
                string s = Shape.Remove(0, 9);
                string s2 = s.Replace(" ", "");
                string s3 = s2.Replace(",-", " -");
                string s4 = s3.TrimEnd(',');

                //create polyline graphic
                PointCollectionConverter pPointCollectionConverter = new PointCollectionConverter();
                //get the point collection and add it to a polyline geometry
                ESRI.ArcGIS.Client.Geometry.PointCollection pPCPolyline = new ESRI.ArcGIS.Client.Geometry.PointCollection();
                pPCPolyline = (ESRI.ArcGIS.Client.Geometry.PointCollection)pPointCollectionConverter.ConvertFromString(s4);

                ESRI.ArcGIS.Client.Geometry.Polyline polyline = new ESRI.ArcGIS.Client.Geometry.Polyline();
                polyline.Paths.Add(pPCPolyline);

                g = new ESRI.ArcGIS.Client.Graphic()
                {
                  Geometry = polyline,
                  //Symbol = DefaultLineSymbol,
                  Symbol = LayoutRoot.Resources["DefaultLineSymbol"] as SimpleLineSymbol,
                };
                graphicsLayer.Graphics.Add(g);
              }

              Shape = pStreamReader.ReadLine();
            }
          }
          catch
          {
            MessageBox.Show("       Error opening file\n Contact GIS for assistance", "Error", MessageBoxButton.OK);
          }
        }

Keith

Re: Graphics Loaded from File - Issue

KeithAnderson — Mon, 31 Jan 2011 22:30:29 GMT

Got it

string s = Shape.Remove(0, 10);

Was trucating first Charachter of first Coord.
Thanks

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