form1.cs

提供了大量初学CSharp的示例

				this.axMap1.CtlRefresh();
			}
			catch (System.Runtime.InteropServices.COMException com)
			{
				MessageBox.Show(com.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void valueMap_Click(object sender, System.EventArgs e)
		{
			try
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
				this.m_pCitiesLyr.Visible = false;
				ESRI.MapObjects2.Core.Recordset pRecs = this.m_pCountiesLyr.Records;
				ESRI.MapObjects2.Core.Strings strings = new ESRI.MapObjects2.Core.StringsClass();
				while (!pRecs.EOF)
				{
					strings.Add(pRecs.Fields.Item("STATE_NAME").ValueAsString);
					pRecs.MoveNext();
				}
				ESRI.MapObjects2.Core.ValueMapRenderer pRend = new ESRI.MapObjects2.Core.ValueMapRendererClass();
				pRend.Field =  "STATE_NAME";
				pRend.ValueCount = strings.Count;
				for (int i=0; i<strings.Count - 1; i++)
				{
					//pRend.Value(Convert.ToInt16(i)) = strings.Item(i);
					pRend.set_Value(Convert.ToInt16(i),strings.Item(i));
				}
				this.m_pCountiesLyr.Renderer = pRend;
				this.axMap1.CtlRefresh();
			}
			catch (System.Runtime.InteropServices.COMException com)
			{
				MessageBox.Show(com.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		
		private void Form1_Load(object sender, System.EventArgs e)
		{
			InitializeMapData();
			InitializeTrackingLayer();
			this.timer1.Interval = 500;

			if (CreateLineMapLayer())
				SaveData();
			this.axMap1.Layers.Add(layer);
			layer.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moRed);
			gds = layer.Records.Export(
				this.dlgSave.FileName.Substring(0, this.dlgSave.FileName.Length - 4) + "1.shp", null);
			ESRI.MapObjects2.Core.Rectangle rec = this.axMap1.FullExtent;
			rec.Top = 2465040d;
			rec.Bottom = 2175099d;
			rec.Left = 1672595d;
			rec.Right = 1865889d;
			this.axMap1.Extent = rec;
			this.axMap1.CtlRefresh();
		}

		/// <summary>
		/// 初始化窗体
		/// </summary>
		private void InitializeMapData()
		{
			try 
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
				ESRI.MapObjects2.Core.DataConnection dataConn = new ESRI.MapObjects2.Core.DataConnectionClass();
				string dataPath = ReturnDataPath("Northeast");
				dataConn.Database = dataPath;
				dataConn.Connect();
				if (dataConn.Connected)
				{
					this.m_pCountiesLyr = new ESRI.MapObjects2.Core.MapLayerClass();
					ESRI.MapObjects2.Core.GeoDataset gds = dataConn.FindGeoDataset("Counties");
					if (gds != null)
					{
						this.m_pCountiesLyr.GeoDataset = gds;
						this.m_pCountiesLyr.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moPaleYellow);
						this.axMap1.Layers.Add(this.m_pCountiesLyr);
					}
					this.m_pCitiesLyr = new ESRI.MapObjects2.Core.MapLayerClass();
					gds = dataConn.FindGeoDataset("Necenter");
					if (gds != null)
					{
						this.m_pCitiesLyr.GeoDataset = gds;
						this.m_pCitiesLyr.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moBlue);
						this.axMap1.Layers.Add(this.m_pCitiesLyr);
					}
				}
				if (this.axMap1.Layers.Count != 2)
				{
					MessageBox.Show("加载地图文件出错","错误");
				}
			} 
			catch (System.Exception e) 
			{
				MessageBox.Show(e.Message);
			}
			finally {
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
			}
		}

		private string ReturnDataPath(string dataPath)
		{
			/*string basePath = Application.ExecutablePath;
			int index = basePath.LastIndexOf("Samples");
			if (index > -1)
			{
				return basePath.Substring(0, index + 8) + "Data\\" + dataPath;
			}
			else
				return null;*/
			return this.m_dataPath + dataPath;
		}

		private void InitializeTrackingLayer()
		{
			stdole.StdFont fnt = new stdole.StdFontClass();
			fnt.Name = "Wingdings";
			fnt.Bold = false;
			this.axMap1.TrackingLayer.SymbolCount = 2;
			this.axMap1.TrackingLayer.get_Symbol(0).Color = (uint)ESRI.MapObjects2.Core.ColorConstants.moBlue;
			this.axMap1.TrackingLayer.get_Symbol(0).Style = (short)ESRI.MapObjects2.Core.MarkerStyleConstants.moTrueTypeMarker;
			this.axMap1.TrackingLayer.get_Symbol(0).Font = fnt;
			this.axMap1.TrackingLayer.get_Symbol(0).Size = 16;
			this.axMap1.TrackingLayer.get_Symbol(0).CharacterIndex = 88;

			this.axMap1.TrackingLayer.get_Symbol(1).Color = (uint)ESRI.MapObjects2.Core.ColorConstants.moPurple;
			this.axMap1.TrackingLayer.get_Symbol(1).Style = (short)ESRI.MapObjects2.Core.MarkerStyleConstants.moTrueTypeMarker;
			this.axMap1.TrackingLayer.get_Symbol(1).Font = fnt;
			this.axMap1.TrackingLayer.get_Symbol(1).Size = 16;
			this.axMap1.TrackingLayer.get_Symbol(1).CharacterIndex = 88;
		}

		private void axMap1_MouseDownEvent(object sender, ESRI.MapObjects2.Core.MouseDownEventArgs e)
		{
			IEnumerator btnEnum = toolBar1.Buttons.GetEnumerator();
			btnEnum.Reset();
			System.Windows.Forms.ToolBarButton tbb = null;
			while(btnEnum.MoveNext())
			{
				tbb = (System.Windows.Forms.ToolBarButton)btnEnum.Current;
				if (tbb.Pushed ) break;
			}
			if (tbb != null)
			{
				if (tbb.ToolTipText.Equals("Zoom In")) DoZoom(e.shift);
				else if (tbb.ToolTipText.Equals("Pan")) this.axMap1.Pan();
				else if (tbb.ToolTipText.Equals("Add Event")) AddEvent(e.x, e.y);
				else if (tbb.ToolTipText.Equals("Select Events")) SelectEvents();
			}

			
		}

		/*private void Buffer(Object shape)
		{
			try
			{
				ESRI.MapObjects2.Core.GeoEvent res;
				if (shape == null)
				{
					MessageBox.Show("shape is nothing");
				}
				ESRI.MapObjects2.Core.Polygon poly = shape as ESRI.MapObjects2.Core.PolygonClass;
				if (poly != null)
				{
					res = this.axMap1.TrackingLayer.AddEvent(poly, 1);
				}
				ESRI.MapObjects2.Core.Line line = shape as ESRI.MapObjects2.Core.LineClass;
				if (line != null)
					res = this.axMap1.TrackingLayer.AddEvent(line, 0);
			}
			catch (System.Runtime.InteropServices.COMException comEx)
			{
				MessageBox.Show(comEx.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}*/

		private void stdDev_Click(object sender, System.EventArgs e)
		{
			try
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
				this.m_pCitiesLyr.Visible = false;
				ESRI.MapObjects2.Core.Recordset pRecs = this.m_pCountiesLyr.Records;
				ESRI.MapObjects2.Core.ClassBreaksRenderer pCBRend = new ESRI.MapObjects2.Core.ClassBreaksRendererClass();
				pCBRend.Field = "P_OTHER";
				ESRI.MapObjects2.Core.Statistics pStats = pRecs.CalculateStatistics("P_OTHER");
				double dBreak = pStats.Mean - (pStats.StdDev * 3);
				for (int i=0; i<6; i++)
				{
					if (dBreak >= pStats.Min && dBreak < pStats.Max)
					{
						pCBRend.BreakCount ++;
						//pCBRend.Break(pCBRend.BreakCount - Convert.ToInt16(1)) = dBreak;
						short j = Convert.ToInt16(pCBRend.BreakCount - 1);
						pCBRend.set_Break(j, dBreak);
					}
					dBreak += pStats.StdDev;
				}
				pCBRend.RampColors(Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moLightYellow), Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moRed));
				this.m_pCountiesLyr.Renderer = pCBRend;
				this.axMap1.CtlRefresh();
			}
			catch (System.Runtime.InteropServices.COMException com)
			{
				MessageBox.Show(com.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void labMap_Click(object sender, System.EventArgs e)
		{
		
		}

		private void dotDens_Click(object sender, System.EventArgs e)
		{
			try
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.WaitCursor;
				this.m_pCitiesLyr.Visible = false;
				ESRI.MapObjects2.Core.DotDensityRenderer pRend = new ESRI.MapObjects2.Core.DotDensityRendererClass();
				this.m_pCountiesLyr.Renderer = pRend;
				pRend.Field = "HBEDS_1000";
				ESRI.MapObjects2.Core.Statistics pStats;
				ESRI.MapObjects2.Core.Recordset pRecs = this.m_pCountiesLyr.Records;
				pStats = pRecs.CalculateStatistics("HBEDS_1000");
				pRend.DotValue = (pStats.Min + (pStats.Max - pStats.Min)/2)/20;
				pRend.DotColor = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moRed);
				this.axMap1.CtlRefresh();
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;

			}
			catch (System.Runtime.InteropServices.COMException com)
			{
				MessageBox.Show(com.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			IEnumerator btnEnum = this.toolBar1.Buttons.GetEnumerator();
			btnEnum.Reset();
			System.Windows.Forms.ToolBarButton tbb;
			while (btnEnum.MoveNext())
			{
				tbb = (System.Windows.Forms.ToolBarButton)btnEnum.Current;
				tbb.Pushed = false;
			}
			e.Button.Pushed = true;
		}

		private void DoZoom(short shift)
		{
			if (shift == 0.0)
				this.axMap1.Extent = this.axMap1.TrackRectangle();
			else
			{
				ESRI.MapObjects2.Core.Rectangle r = this.axMap1.Extent;
				r.ScaleRectangle(1.5d);
				this.axMap1.Extent = r;
			}
		}

		private void SelectEvents()
		{
			ESRI.MapObjects2.Core.Rectangle r = this.axMap1.TrackRectangle();
			long nEventCount = this.axMap1.TrackingLayer.EventCount;
			ESRI.MapObjects2.Core.Point testPt = new ESRI.MapObjects2.Core.PointClass();
			ESRI.MapObjects2.Core.GeoEvent evt;
			for (int i=0;i<nEventCount;i++)
			{
				evt = this.axMap1.TrackingLayer.get_Event(i);
				testPt.X = evt.X;
				testPt.Y = evt.Y;
				if (r.IsPointIn(testPt))
					evt.SymbolIndex = 1;
				else
					evt.SymbolIndex = 0;
			}
		}

		private void AddEvent(Single x, Single y)
		{
			ESRI.MapObjects2.Core.Point pt = this.axMap1.ToMapPoint(x, y);
			this.axMap1.TrackingLayer.AddEvent(pt, 0);
		}

		/*private Object TrackShape()
		{
			if (this.radioButton2.Checked)
			{
				ESRI.MapObjects2.Core.Polygon poly = this.axMap1.TrackPolygon();
				ESRI.MapObjects2.Core.GeoEvent evtPoly = this.axMap1.TrackingLayer.AddEvent(poly, 1);
				return poly;