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关于点击可停靠窗体的按钮进行划线的异常(附代码)
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关于点击可停靠窗体的按钮进行划线的异常(附代码)
首先我注册了test的命令,把划线的处理绑定给了可停靠窗体(ucp)的按钮按下事件(button1.click)
<autodesk.autocad.runtime.commandmethod("test")> _
public sub test()
addhandler ucp.button1.click, addressof button1_clickevent
end sub
按下事件的处理如下:
public sub button1_clickevent(byval sender as system.object, byval e as system.eventargs)
try
dim db as database = hostapplicationservices.workingdatabase
dim pt1 as new point3d(300, 100, 0)
dim pt2 as new point3d(900, 500, 0)
dim lineent as new line(pt1, pt2)
using trans as transaction = db.transactionmanager.starttransaction()
dim bt as blocktable = trans.getobject(db.blocktableid, openmode.forread)
dim btr as blocktablerecord = trans.getobject(bt.item(blocktablerecord.modelspace), openmode.forwrite)
btr.appendentity(lineent)
trans.addnewlycreateddbobject(lineent, true)
trans.commit()
end using
catch ex as exception
debug.writeline(ex.message)
end try
end sub
运行cad把这个dll导入进去之后,执行test命令,然后点击绑定划线事件处理的按钮,结果出现如下错误:
在 autodesk.autocad.runtime.exception 中第一次偶然出现的“acdbmgd.dll”类型的异常
elockviolation
很奇怪,如果我在test命令里直接加上划线的处理就能正确画出线来,谁能知道是怎么回事???
老问题了 要加一个 doclock
谢谢回答,不过能具体点说嘛,或者以前的帖子给我个连接也行