.NET: How to set the Lineweight of a Line

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问题：
How do I create a line and append it to the current space, but also setting its LineWeight?

解答：

1. [Autodesk.AutoCAD.Runtime.CommandMethod("CreateLine")]
   
2. // creates a line and sets the lineweight for it, by Fenton Webb, DevTech, Autodesk
   
3. public void CreateLine()
   
4. {
   
5.     // create a new line
   
6.     Line line = new Line(new Point3d(0, 0, 0), new Point3d(100, 100, 0));
   
7. 
   
8.     // set the lineweight for it
   
9.     line.LineWeight = LineWeight.LineWeight211;
   
10. 
    
11.     // add the object to the current space
    
12.     Database dwg = HostApplicationServices.WorkingDatabase;
    
13. 
    
14. 
    
15.     // make sure lineweights are turn on
    
16.     dwg.LineWeightDisplay = true;
    
17. 
    
18. 
    
19.     // get the transaction manager
    
20.     Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = dwg.TransactionManager;
    
21.     // start a new transaction
    
22.     using (Transaction myT = tm.StartTransaction())
    
23.     {
    
24.         try
    
25.         {
    
26.             // get the current space and open it for write
    
27.             BlockTableRecord btr = (BlockTableRecord)tm.GetObject(dwg.CurrentSpaceId, OpenMode.ForWrite, false);
    
28. 
    
29. 
    
30.             // add it to the blocktable record
    
31.             btr.AppendEntity(line);
    
32. 
    
33. 
    
34.             // now to the tranaction manager
    
35.             tm.AddNewlyCreatedDBObject(line, true);
    
36. 
    
37. 
    
38.             // all ok, lets commit it
    
39.             myT.Commit();
    
40.         }
    
41.         catch
    
42.         {
    
43.             // if we failed, then abort
    
44.             myT.Abort();
    
45.         };
    
46.     }
    
47. }
    

[Autodesk.AutoCAD.Runtime.CommandMethod("CreateLine")]<br /> // creates a line and sets the lineweight for it, by Fenton Webb, DevTech, Autodesk<br /> public void CreateLine()<br /> {<br />     // create a new line<br />     Line line = new Line(new Point3d(0, 0, 0), new Point3d(100, 100, 0));<br /> <br />     // set the lineweight for it<br />     line.LineWeight = LineWeight.LineWeight211;<br /> <br />     // add the object to the current space<br />     Database dwg = HostApplicationServices.WorkingDatabase;<br /> <br /> <br />     // make sure lineweights are turn on<br />     dwg.LineWeightDisplay = true;<br /> <br /> <br />     // get the transaction manager<br />     Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = dwg.TransactionManager;<br />     // start a new transaction<br />     using (Transaction myT = tm.StartTransaction())<br />     {<br />         try<br />         {<br />             // get the current space and open it for write<br />             BlockTableRecord btr = (BlockTableRecord)tm.GetObject(dwg.CurrentSpaceId, OpenMode.ForWrite, false);<br /> <br /> <br />             // add it to the blocktable record<br />             btr.AppendEntity(line);<br /> <br /> <br />             // now to the tranaction manager<br />             tm.AddNewlyCreatedDBObject(line, true);<br /> <br /> <br />             // all ok, lets commit it<br />             myT.Commit();<br />         }<br />         catch<br />         {<br />             // if we failed, then abort<br />             myT.Abort();<br />         };<br />     }<br /> }<br />

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