C# 选择集基础实例

7.兮♂贝 发表于 2013-7-31 17:31:29

是一个简单的选择集基础实例，希望对新手有帮助，高手勿喷
然后还有一个问题：怎样才能做出框选的效果？（像AutoCAD的框选效果）

         Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         Database db = HostApplicationServices.WorkingDatabase;
         DocumentLock dlock = Application.DocumentManager.MdiActiveDocument.LockDocument();

         using (Transaction tran = db.TransactionManager.StartTransaction())
         {
            SelectionSet selSet;
            //输入一种选择集过滤的实体类型如circle line text
            PromptStringOptions stringOpts = new PromptStringOptions("\n请输入实体类型：");
            PromptResult stringResult = ed.GetString(stringOpts);
            if (stringResult.Status != PromptStatus.OK) return;

            //输入结束后，将其加入选择集筛选条件
            TypedValue[] typeSet = new TypedValue;
            typeSet = new TypedValue((int)DxfCode.Start, stringResult.StringResult);
            SelectionFilter sFilter = new SelectionFilter(typeSet);
            //①用户选择其实体（选择集方式一）
            //PromptSelectionResult selectResult = ed.GetSelection(sFilter);

            //②用户选择区域    （选择集方式二）
            Point3d onePnt,otherPnt;
            PromptPointOptions pntOpts = new PromptPointOptions("\n请选择起始点：");
            PromptPointResult pntResult = ed.GetPoint(pntOpts);
            if (pntResult.Status != PromptStatus.OK) return;
            onePnt = pntResult.Value;

            pntOpts = new PromptPointOptions("\n请选择结束点：");
            pntOpts.BasePoint = onePnt;
            //是否虚线显示
            //pntOpts.UseDashedLine = true;
            pntOpts.UseBasePoint = true;

            pntResult = ed.GetPoint(pntOpts);
            if (pntResult.Status != PromptStatus.OK) return;
            otherPnt = pntResult.Value;

            //多种选择方法
            //PromptSelectionResult selectResult = ed.SelectCrossingWindow(onePnt, otherPnt, sFilter);
            PromptSelectionResult selectResult = ed.SelectWindow(onePnt, otherPnt, sFilter);

            if (selectResult.Status != PromptStatus.OK) return;
            selSet = selectResult.Value;
            ed.WriteMessage(selSet.Count.ToString());
         }

         dlock.Dispose();

7.兮♂贝 发表于 2013-8-1 08:39:40

找到了另外一种方法来实现了。

站内相关示例帖子：
http://bbs.mjtd.com/forum.php?mod=viewthread&tid=84859
http://www.objectarx.net/forum.php?mod=viewthread&tid=5811

Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
Database db = HostApplicationServices.WorkingDatabase;
DocumentLock dlock = Application.DocumentManager.MdiActiveDocument.LockDocument();

using (Transaction tran = db.TransactionManager.StartTransaction())
{
SelectionSet selSet;
//输入一种选择集过滤的实体类型如circle line text
PromptStringOptions stringOpts = new PromptStringOptions("\n请输入实体类型：");
PromptResult stringResult = ed.GetString(stringOpts);
if (stringResult.Status != PromptStatus.OK) return;

//输入结束后，将其加入选择集筛选条件
TypedValue[] typeSet = new TypedValue;
typeSet = new TypedValue((int)DxfCode.Start, stringResult.StringResult);
SelectionFilter sFilter = new SelectionFilter(typeSet);
//用户选择区域
PromptSelectionOptions selectOpts = new PromptSelectionOptions();
PromptSelectionResult selectResult = ed.GetSelection(selectOpts,sFilter);

if (selectResult.Status != PromptStatus.OK) return;
selSet = selectResult.Value;

//得到该用户选择区域的左下角和右上角
CrossingOrWindowSelectedObject o = (CrossingOrWindowSelectedObject)selSet;
PickPointDescriptor[] p = o.GetPickPoints();
Point2d minPoint = new Point2d(p.PointOnLine.X, p.PointOnLine.Y);
Point2d maxPoint = new Point2d(p.PointOnLine.X, p.PointOnLine.Y);

ed.WriteMessage("\n" + minPoint.ToString());
ed.WriteMessage("\n" + maxPoint.ToString());
}

dlock.Dispose();

xingang1005 发表于 2013-8-23 09:53:42

呵呵，比较基础。。。。。。

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C# 选择集基础实例