Syncronizing attribute references with ObjectARX

[Anonymous]

Hi guys,

I wrote a C# program with ObjectARX which modifies some attribute definition inside two static blocks (height and position). How can I now sync the block/attribute references according to the new definitions (as issuing "ATTSYNC N *") ?

I tried using SendStringToExecute but it's an async method: the program saves and closes the document before the command could be completed.

Thank you,

Alessandro.

[philippe.leefsma]

Hi Alessandro,

Unfortunately there is no direct method do repeat ATTSYNC command. To achieve the same result, you can try the following steps: (1) open the block definition and block reference, (2) iterate though attribute references on block reference and find the appropriate attribute definition (using TAG as a search criteria), (3) use the setAttributeFromBlock to copy the new attribute.

Another option is to send ATTSYNC command:

[CommandMethod("AttsyncCmd")]

static public void AttsyncCmd()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

    string bName = "blk1";

    string command = "_ATTSYNC Name " + bName + "\n";

    doc.SendStringToExecute(command, true, false, false);

}

If you are doing that inside a save & close operation, then yes it will not work. You need to P/Invoke a synchronous method such as "acedCommand". Here is an example:

[DllImport("acad.exe", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl, EntryPoint = "acedCommand")]
private static extern int acedCommand(int type, __arglist);

[CommandMethod("acedCommand3")]
public void acedCommand3()
{
    double rad = 2.5;

    double[] center = new double[3] { 0, 0, 0 };

    acedCommand(5005, __arglist("_.CIRCLE", 5009, center, 5001, rad, 5000));
}

Note for next time: you may want to post C#/VB.Net questions to the .Net section rather than ObjectARX (reserved for C++).

Regards,

Philippe.

Philippe Leefsma
Developer Consultant
Developer Technical Services
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