Reloading external reference through .NET

eachy

http://adndevblog.typepad.com/autocad/2012/06/reloading-external-reference-through-net.html
Reloading external reference through .NETBy Virupaksha Aithal
You can use “Database.ReloadXrefs” API to reload the external referenced drawing files. “ReloadXrefs” takes a collection of object ids, which can be prepared by traversing through the block table as shown in below code.

1. [CommandMethod("ReloadXRefs")]
   
2. static public void ReloadXRefs()
   
3. {
   
4.     Document doc = Application.DocumentManager.MdiActiveDocument;
   
5.     Database db = doc.Database;
   
6.     ObjectIdCollection ids = new ObjectIdCollection();
   
7.     using (Transaction tr = db.TransactionManager.StartTransaction())
   
8.     {
   
9.         BlockTable table = tr.GetObject(db.BlockTableId,
   
10.                                     OpenMode.ForRead) as BlockTable;
    
11.         foreach (ObjectId id in table)
    
12.         {
    
13.             BlockTableRecord record = tr.GetObject(id,
    
14.                                OpenMode.ForRead) as BlockTableRecord;
    
15.             if (record.IsFromExternalReference)
    
16.             {
    
17.                 ids.Add(id);
    
18.             }
    
19.         }
    
20.         tr.Commit();
    
21.     }
    
22.     //now relaod the xrefs
    
23.     if (ids.Count != 0)
    
24.     {
    
25.         db.ReloadXrefs(ids);
    
26.     }
    
27. }
    

[CommandMethod("ReloadXRefs")]<br /> static public void ReloadXRefs()<br /> {<br />     Document doc = Application.DocumentManager.MdiActiveDocument;<br />     Database db = doc.Database;<br />     ObjectIdCollection ids = new ObjectIdCollection();<br />     using (Transaction tr = db.TransactionManager.StartTransaction())<br />     {<br />         BlockTable table = tr.GetObject(db.BlockTableId, <br />                                     OpenMode.ForRead) as BlockTable;<br />         foreach (ObjectId id in table)<br />         {<br />             BlockTableRecord record = tr.GetObject(id,<br />                                OpenMode.ForRead) as BlockTableRecord;<br />             if (record.IsFromExternalReference)<br />             {<br />                 ids.Add(id);<br />             }<br />         }<br />         tr.Commit();<br />     }<br />     //now relaod the xrefs<br />     if (ids.Count != 0)<br />     {<br />         db.ReloadXrefs(ids);<br />     }<br /> }<br />