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1、MapControl控件提供了直接在控件上绘制图形和文字的方法，如DrawShape、DrawText。这两个方法绘制的图形都是缓存（cache），而不是真正的保存，一旦出现窗口重绘，如地图刷新等，这些图形都将消失。代码:int flag = 0; private void button1_Click(object sender, EventArgs e)flag = 1;/划线 private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEve
2、nt e) axMapControl1.MousePointer = ESRI.ArcGIS.Controls.esriControlsMousePointer.esriPointerCrosshair; ESRI.ArcGIS.Geometry.IGeometry geometry = null; if (flag = 1) geometry = axMapControl1.TrackLine(); else if (flag = 2) geometry = axMapControl1.TrackCircle(); else if (flag = 3) geometry = axMapCon
3、trol1.TrackRectangle(); else if (flag = 4) geometry = axMapControl1.TrackPolygon(); else if (flag = 5) ESRI.ArcGIS.Geometry.IPoint point = new ESRI.ArcGIS.Geometry.PointClass(); point.X = e.x; point.Y = e.y; geometry = point as ESRI.ArcGIS.Geometry.IGeometry; if (flag = 1 & flag = 4) drwaMapShape(ge
4、ometry); else if (flag = 5) drawMapText(geometry); axMapControl1.Refresh(ESRI.ArcGIS.Carto.esriViewDrawPhase.esriViewGeography, null, null); private void drawMapText(ESRI.ArcGIS.Geometry.IGeometry geometry) ESRI.ArcGIS.Display.IRgbColor pColor; pColor = new ESRI.ArcGIS.Display.RgbColorClass(); pColo
5、r.Red = 255; pColor.Green = 0; pColor.Blue = 0; ESRI.ArcGIS.Display.ITextSymbol textSystem = new ESRI.ArcGIS.Display.TextSymbol(); textSystem.Color = pColor; object symbol = textSystem; axMapControl1.DrawText(geometry, 测试DrawText, ref symbol); private void drwaMapShape(ESRI.ArcGIS.Geometry.IGeometry
6、 geometry) ESRI.ArcGIS.Display.IRgbColor pColor; pColor = new ESRI.ArcGIS.Display.RgbColorClass(); pColor.Red = 255;pColor.Green =255; pColor.Blue = 0; object symbol = null; if (geometry.GeometryType = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline) ESRI.ArcGIS.Display.ISimpleLineSymbol
7、simpleLineSymbol; simpleLineSymbol = new ESRI.ArcGIS.Display.SimpleLineSymbolClass(); simpleLineSymbol.Color = pColor; simpleLineSymbol.Width = 5; symbol = simpleLineSymbol; else ESRI.ArcGIS.Display.ISimpleFillSymbol simpleLineSymbol; simpleLineSymbol = new ESRI.ArcGIS.Display.SimpleFillSymbolClass(
8、); simpleLineSymbol.Color = pColor; / simpleLineSymbol.Width = 5; symbol = simpleLineSymbol; axMapControl1.DrawShape(geometry,ref symbol); private void button2_Click(object sender, EventArgs e) flag = 2;/画圆 private void button3_Click(object sender, EventArgs e) flag = 3;/画矩形对象 private void button4_Click(object sender, EventArgs e) flag = 4;/画面对private void button5_Click(object sender, EventArgs e) flag = 5;/花纹对象
