1.根据XY创建一个点

/// <summary>

/// 根据x y创建新点

/// </summary>

/// <param name="dX">x坐标值</param>

/// <param name="dY">y坐标值</param>

/// <returns>返回点要素</returns>

/// <remarks></remarks>

public static IPoint GetPntFromXY(double dX, double dY)

{

IPoint pPnt = new PointClass();

pPnt.PutCoords(dX, dY);

return pPnt;

}

2.创建MarkerElement

IElement pele = new MarkerElementClass();

pele.Geometry = GetPntFromXY(x, y);

IMarkerSymbol sym = new SimpleMarkerSymbolClass();

sym.Color = ColorCustom(rDefault, gDefault, bDefault);

sym.Size = ;

(pele as IMarkerElement).Symbol = sym;