//绘制单个点操作
public void DrawPoint(IActiveView activeView, IPoint p, bool red)
{
if (activeView == null)
{
return;
}
ESRI.ArcGIS.Display.IScreenDisplay screenDisplay = activeView.ScreenDisplay;
screenDisplay.StartDrawing(screenDisplay.hDC, (System.Int16)ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache);
ESRI.ArcGIS.Display.ISimpleMarkerSymbol simpleMarkerSymbol = new ESRI.ArcGIS.Display.SimpleMarkerSymbolClass();
simpleMarkerSymbol.Style = ESRI.ArcGIS.Display.esriSimpleMarkerStyle.esriSMSCross;
simpleMarkerSymbol.Size = 15;
if (red)
{
simpleMarkerSymbol.Color = redColor;
}
else
{
simpleMarkerSymbol.Color = greenColor;
}
ESRI.ArcGIS.Display.ISymbol symbol = simpleMarkerSymbol as ESRI.ArcGIS.Display.ISymbol; // Dynamic cast.
screenDisplay.SetSymbol(symbol);
ESRI.ArcGIS.Display.IDisplayTransformation displayTransformation = screenDisplay.DisplayTransformation;
screenDisplay.DrawPoint(p);
screenDisplay.FinishDrawing();
}
public void DrawPoint(ESRI.ArcGIS.Carto.IActiveView activeView, System.Int32 x, System.Int32 y)
{
if (activeView == null)
{
return;
}
ESRI.ArcGIS.Display.IScreenDisplay screenDisplay = activeView.ScreenDisplay;
// Constant
screenDisplay.StartDrawing(screenDisplay.hDC, (System.Int16)ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache); // Explicit Cast
ESRI.ArcGIS.Display.ISimpleMarkerSymbol simpleMarkerSymbol = new ESRI.ArcGIS.Display.SimpleMarkerSymbolClass();
ESRI.ArcGIS.Display.ISymbol symbol = simpleMarkerSymbol as ESRI.ArcGIS.Display.ISymbol; // Dynamic Cast
screenDisplay.SetSymbol(symbol);
ESRI.ArcGIS.Display.IDisplayTransformation displayTransformation = screenDisplay.DisplayTransformation;
// x and y are in device coordinates
ESRI.ArcGIS.Geometry.IPoint point = displayTransformation.ToMapPoint(x, y);
screenDisplay.DrawPoint(point);
screenDisplay.FinishDrawing();
}
