topic Re : ReadDwgFile - side database correct useage in .NET Forum

ReadDwgFile - side database correct useage

Dale.Bartlett — Tue, 16 Dec 2014 11:33:15 GMT

All, I have struck some seemingly contradictory information and would appreciate a comment on the correct method to access a side database (dwg), edit, and save to the same name. I have been doing this for ages but now wonder if correctly:

// Fenton version

public static void DoSomeWorkExt01(string DwgToProcess)

{

using (Database db = new Database(false, true))

{

db.ReadDwgFile(DwgToProcess, FileOpenMode.OpenForReadAndReadShare, false, "");

// closing the input makes sure the whole dwg is read from disk

// it also closes the file so you can SaveAs the same name

db.CloseInput(true);

// store the current working database, to reset

Database currDb = HostApplicationServices.WorkingDatabase;

// set working database

HostApplicationServices.WorkingDatabase = db;

{Do Some Work}

db.SaveAs(DwgToProcess, DwgVersion.Current);

// reset the working database

HostApplicationServices.WorkingDatabase = currDb;

}

// my code currently

public static void DoSomeWorkExt02(string DwgToProcess)

{

using (Database db = new Database(false, false))

{

db.ReadDwgFile(DwgToProcess, FileOpenMode.OpenForReadAndWriteNoShare, true, "");

{Do Some Work}

db.SaveAs(DwgToProcess, DwgVersion.Current);

}

Thanks, Dale.

Re : ReadDwgFile - side database correct useage

FRFR1426 — Tue, 16 Dec 2014 18:58:23 GMT

Setting the HostApplicationServices.WorkingDatabase seems to be needed for some operations. From the docs:

Many areas of ObjectDBX code require a database to query for information. For example, if you make an Entity in memory, it may require default information from a database. It will take that information from the working database.

Re : ReadDwgFile - side database correct useage

Dale.Bartlett — Thu, 18 Dec 2014 07:18:56 GMT

Thanks for the reply. I have been trialing Fenton's code and so far so good. I was looking for a single, all cases version. His original code referred only to attaching Xrefs, but it does seem the safer process for all occasions. Dale