form1.cs

利用CSharp进行二次开发

					}
					if (point.Y > 89.891975)   //fudge value to clip near poles
					{
						point.Y = point.Y - 179.78395;
					}
					else if (point.Y < -89.891975)  //fudge value to clip near poles
					{
						point.Y = point.Y + 179.78395;
					}
					//Project the point onto the displays current spatial reference
					//WHERE the point is going TO
					point.Project(m_ProjectedCoordinateSystem);
					element.Geometry = point;
				}
				element = m_GraphicsContainer.Next();
			}

			//Refresh the graphics
			m_MapControl.Refresh(esriViewDrawPhase.esriViewGraphics,Type.Missing,Type.Missing);

		}

		private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.MapControl.IMapControlEvents2_OnMouseDownEvent e)
		{
			//If left mouse button then zoom in
			if (e.button == 1)
			{
				m_MapControl.Extent = m_MapControl.TrackRectangle();
			}
			else
			{
				//Create a point and get the IPoint interface
				IPoint point = new PointClass();
				//Set points coordinates
				point.PutCoords(e.mapX, e.mapY);

				//QI for ITopologicalOperator interface through IPoint interface
				ITopologicalOperator topologicalOperator = (ITopologicalOperator) point;
				//Create a polygon by buffering the point and get the IPolygon interface
				IPolygon polygon = (IPolygon) topologicalOperator.Buffer(m_MapControl.Extent.Width * 0.02);
				//QI for IRelationalOperator interface through IPolygon interface
				IRelationalOperator relationalOperator = (IRelationalOperator) polygon;

				object o = null;
				//Draw the polygon
				m_MapControl.DrawShape(polygon, ref o);

				//Loop through the elements in the GraphicContainer and get the IElement interface
				m_GraphicsContainer.Reset();
				IElement element = m_GraphicsContainer.Next();
				while (element != null)
				{
					//If the polygon contains the point
					if (relationalOperator.Contains(element.Geometry) == true)
					{
						//QI for IMarkerElement interface through IElement interface
						IMarkerElement markerElement = (IMarkerElement) element;
						markerElement.Symbol = GetMarkerSymbol(true);
						//QI for the IElementProperties interface through IElement interface
						IElementProperties elementProperties = (IElementProperties) element;
						elementProperties.Name = true.ToString();
					}
					element = m_GraphicsContainer.Next();
				}
				if (chkTracking.CheckState == CheckState.Unchecked)
					//Refresh the graphics
					m_MapControl.Refresh(esriViewDrawPhase.esriViewGraphics, Type.Missing, Type.Missing);
				}
			}

		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			//Release COM objects 
			ESRI.ArcGIS.Utility.COMSupport.AOUninitialize.Shutdown();
		}

		private void chkTracking_Click(object sender, System.EventArgs e)
		{
			//Turn the timer on or off
			if (chkTracking.CheckState == CheckState.Checked)
			{
				timer1.Start();
			}
			else if (chkTracking.CheckState == CheckState.Unchecked)
			{
				timer1.Stop();
			}
		}

		private IRgbColor GetRGBColor(int red,int green, int blue) 
		{
			//Create rgb color and grab hold of the IRGBColor interface
			IRgbColor rGB = new RgbColorClass(); 
			//Set rgb color properties
			rGB.Red = red;
			rGB.Green = green;
			rGB.Blue = blue;
			return rGB;
		}

		private void SymbolizeData(ILayer layer, double dWidth, IRgbColor colorLine, IRgbColor colorFill)
		{
			//Create a line symbol and get the ILineSymbol interface
			ILineSymbol lineSymbol = new SimpleLineSymbolClass();
			//Set the line symbol properties
			lineSymbol.Width = dWidth;
			lineSymbol.Color = colorLine;

			//Create a fill symbol and get the IFillSymbol interface
			ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
			//Set the fill symbol properties
			fillSymbol.Outline = lineSymbol;
			fillSymbol.Color = colorFill;

			//Create a simple renderer and get the ISimpleRenderer interface 
			ISimpleRenderer simpleRenderer = new SimpleRendererClass();
			//Set the simple renderer properties
			simpleRenderer.Symbol = (ISymbol) fillSymbol;

			//QI for the IGeoFeatureLayer interface from the ILayer2 interface
			IGeoFeatureLayer geoFeatureLayer = (IGeoFeatureLayer) layer;
			//Set the GeoFeatureLayer properties
			geoFeatureLayer.Renderer = (IFeatureRenderer) simpleRenderer;
		}

		private void MakeCoordinateSystems()
		{
			//Create a spatial reference environment and get theISpatialReferenceFactory2 interface
			ISpatialReferenceFactory2 spatRefFact = new SpatialReferenceEnvironmentClass();
			//Create a geographic coordinate system and get the IGeographicCoordinateSystem interface
			m_GeographicCoordinateSystem = spatRefFact.CreateGeographicCoordinateSystem((int) esriSRGeoCSType.esriSRGeoCS_WGS1984);
			//Create a projected coordinate system and get the IProjectedCoordinateSystem interface
			m_ProjectedCoordinateSystem = spatRefFact.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_World_Mollweide);
			//Set the map controls spatial reference property
			m_MapControl.SpatialReference = m_ProjectedCoordinateSystem;
		}

		private ICharacterMarkerSymbol GetMarkerSymbol(bool bLocated)
		{
			//Create a new system draw font
			System.Drawing.Font drawFont = new System.Drawing.Font("ESRI Crime Analysis", 21);

			//Create a new CharacterMarkerSymbol and get the ICharacterMarkerSymbol interface
			ICharacterMarkerSymbol charMarker = new CharacterMarkerSymbolClass();
			//Set the marker symbol properties
			charMarker.Font = (stdole.IFontDisp) OLE.GetIFontDispFromFont(drawFont);
			
			if (bLocated == true)
			{
				charMarker.CharacterIndex = 56;
				charMarker.Color = GetRGBColor(255, 0, 0);
				charMarker.Size = 30;
			}
			else
			{
				charMarker.CharacterIndex = 46;
				charMarker.Color = GetRGBColor(0, 0, 0);
				charMarker.Size = 30;
			}
			return charMarker;
		}

		private void DisplayAgentLocation(AGENT_IN_FIELD agent)
		{
			//Create a point and get the IPoint interface
			IPoint point = new PointClass();
			//Set the points x and y coordinates
			point.PutCoords(agent.Longitude, agent.Latitude);
			//Set the points spatial reference - WHERE the point is coming FROM
			point.SpatialReference = m_GeographicCoordinateSystem;
			//Project the point onto the displays current spatial reference - WHERE the point is going TO
			point.Project(m_ProjectedCoordinateSystem);

			//Create a marker element and get the IElement interface
			IElement element = new MarkerElementClass();
			//Set the elements geometry
			element.Geometry = point;

			//QI for the IMarkerElement interface from the IElement interface
			IMarkerElement markerElement = (IMarkerElement) element;
			//Set the marker symbol
			markerElement.Symbol = GetMarkerSymbol(agent.Located);

			//QI for the IElementProperties interface from the IMarkerElement interface
			IElementProperties elementProperties = (IElementProperties) markerElement;
			elementProperties.Name = agent.Located.ToString();

			//Add the element to the graphics container
			m_GraphicsContainer.AddElement(element, 0);
		}

		private void LoadAgentArray()
		{
			//Populate an array of agent locations and id's. The locations are in decimal degrees,
			//based on the WGS1984 geographic coordinate system. [ie unprojected].
			//Obviously, these values could be read directly from a GPS unit.
			agentArray[0].CodeNumber = "001";
			agentArray[0].Latitude = 56.185128983308;
			agentArray[0].Longitude = 37.556904400607;
			agentArray[0].Located = false;
			agentArray[1].CodeNumber = "002";
			agentArray[1].Latitude = 48.3732928679818;
			agentArray[1].Longitude = 6.91047040971168;
			agentArray[1].Located = false;
			agentArray[2].CodeNumber = "003";
			agentArray[2].Latitude = 32.1487101669196;
			agentArray[2].Longitude = 39.3596358118361;
			agentArray[2].Located = false;
			agentArray[3].CodeNumber = "004";
			agentArray[3].Latitude = 29.7450682852807;
			agentArray[3].Longitude = 71.2078907435508;
			agentArray[3].Located = false;
			agentArray[4].CodeNumber = "005";
			agentArray[4].Latitude = 38.7587253414264;
			agentArray[4].Longitude = 138.509863429439;
			agentArray[4].Located = false;
			agentArray[5].CodeNumber = "006";
			agentArray[5].Latitude = 35.1532625189681;
			agentArray[5].Longitude = -82.0242792109256;
			agentArray[5].Located = false;
			agentArray[6].CodeNumber = "007";
			agentArray[6].Latitude = -26.1396054628225;
			agentArray[6].Longitude = 28.5432473444613;
			agentArray[6].Located = true;
			agentArray[7].CodeNumber = "008";
			agentArray[7].Latitude = 33.9514415781487;
			agentArray[7].Longitude = 3.90591805766313;
			agentArray[7].Located = false;
			agentArray[8].CodeNumber = "009";
			agentArray[8].Latitude = 29.7450682852807;
			agentArray[8].Longitude = 16.5250379362671;
			agentArray[8].Located = false;
			agentArray[9].CodeNumber = "010";
			agentArray[9].Latitude = 45.9696509863429;
			agentArray[9].Longitude = 23.1350531107739;
			agentArray[9].Located = false;
			agentArray[10].CodeNumber = "011";
			agentArray[10].Latitude = 48.9742033383915;
			agentArray[10].Longitude = 14.1213960546282;
			agentArray[10].Located = false;
			agentArray[11].CodeNumber = "012";
			agentArray[11].Latitude = 29.7450682852807;
			agentArray[11].Longitude = 79.0197268588771;
			agentArray[11].Located = false;
			agentArray[12].CodeNumber = "013";
			agentArray[12].Latitude = 43.5660091047041;
			agentArray[12].Longitude = 125.289833080425;
			agentArray[12].Located = false;
			agentArray[13].CodeNumber = "014";
			agentArray[13].Latitude = 7.5113808801214;
			agentArray[13].Longitude = -68.2033383915023;
			agentArray[13].Located = false;
			agentArray[14].CodeNumber = "015";
			agentArray[14].Latitude = 9.31411229135053;
			agentArray[14].Longitude = -79.6206373292868;
			agentArray[14].Located = false;
			agentArray[15].CodeNumber = "016";
			agentArray[15].Latitude = 8.71320182094082;
			agentArray[15].Longitude = -9.31411229135053;
			agentArray[15].Located = true;
			agentArray[16].CodeNumber = "017";
			agentArray[16].Latitude = 22.5341426403642;
			agentArray[16].Longitude = 53.7814871016692;
			agentArray[16].Located = false;
			agentArray[17].CodeNumber = "018";
			agentArray[17].Latitude = 42.3641881638847;
			agentArray[17].Longitude = 45.9696509863429;
			agentArray[17].Located = false;
			agentArray[18].CodeNumber = "019";
			agentArray[18].Latitude = 39.3596358118361;
			agentArray[18].Longitude = 27.9423368740516;
			agentArray[18].Located = false;
			agentArray[19].CodeNumber = "020";
			agentArray[19].Latitude = 22.5341426403642;
			agentArray[19].Longitude = 104.257966616085;
			agentArray[19].Located = false;
		}
	}
}