arcengine 专题图生成去除引线方法（Leader Lines）

arcengine 生成的专题图，在arcMap里面有个去除引线的选项，但是arcengine里面借口找了很久没有找到。

于是想了以下一个方法来解决这个问题，实质是将引线设为透明。

代码：

ISimpleLineSymbol ldrLine = new SimpleLineSymbol();

IColor color = GetColor(255, 0, 0);

color.NullColor = true;

ldrLine.Color = color; // 透明色

ILineCallout lineCallout = new LineCallout();

lineCallout.Style = esriLineCalloutStyle.esriLCSBase;

lineCallout.Border = null;

lineCallout.AccentBar = null;

lineCallout.LeaderLine = ldrLine;

IMarkerBackgroundSupport pBgSupport = pBarChartSymbol as IMarkerBackgroundSupport;

pBgSupport.Background=lineCallout as IMarkerBackground;

实质上引线作为的是背景，想来也是挺新奇的啊...