/**
* 绘制单点，该点状态不随地图状态变化而变化
* @return 点对象
*/
public Graphic DrawPoint()
{
double mLat = 39.98923;
double mLon = 116.397428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
//构建点
Geometry pointGeometry = new Geometry();
//设置坐标
pointGeometry.SetPoint(pt1, 10);
//设定样式
Symbol pointSymbol = new Symbol();
Symbol.Color pointColor = new Com.Baidu.Mapapi.Map.Symbol.Color(pointSymbol);
pointColor.Red = 0;
pointColor.Green = 126;
pointColor.Blue = 255;
pointColor.Alpha = 255;
pointSymbol.SetPointSymbol(pointColor);
//生成Graphic对象
Graphic pointGraphic = new Graphic(pointGeometry, pointSymbol);
return pointGraphic;
}