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002、获取选择图元的信息
ISession session = MapInfo.Engine.Session.Current;
Table tableUsa = session.Catalog["SHENGHUI"];
// Get fc for selection on usa.
IResultSetFeatureCollection fc = session.Selections.DefaultSelection[tableUsa];
int nCount=0;
if (fc != null)
{
nCount = fc.Count;
......//可以读取每个fc的信息
}
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