How can I create and keep my own Objects outside of any document?

[Ryan]

Question:

I'm trying to find a way to create direct objects from scratch. Essentially what I'd like to do is:

var tronObject = new Obj();

tronObject.Put(...)
tronObject.Put(...)

// and hang on to obj for an undetermined amount of time...

// then add it to an existing document.

What I've come up with is this... and I think it might be "cheating".

var tronSdf = new SDFDoc();
var tronObject = tronSdf.CreateIndirectArray().PushBackDict();

tronObject.Put(...)
tronObject.Put(...)

tronSdf.Dispose();

Is this an efficient method? Is there a better way? 

Answer:

Yes, you can do this, though this is a more lightweight, preferred way.

ObjSet obj_set=new ObjSet();
Obj my_dict = obj_set.CreateDict();

If you ever want to add the object to a document, then you would have to call 

Obj imported = SDFDoc.ImportObj(my_dict, true);

For example, here we use the same custom dictionary in two different documents.

ObjSet obj_set = new ObjSet();
Obj my_dict = obj_set.CreateDict();
my_dict.PutNumber("k1", 55.0);
my_dict.PutString("k2", "my_string_value");

using (PDFDoc doc = new PDFDoc(input_path + "numbered.pdf"))
{
 doc.InitSecurityHandler();
    Obj imported = doc.GetSDFDoc().ImportObj(my_dict, true);
    doc.GetRoot().Put("test_dict", imported);
    doc.Save(output_path + "annotation_test2.pdf", SDFDoc.SaveOptions.e_linearized);
}

using (PDFDoc doc = new PDFDoc(input_path + "numbered.pdf"))
{
    doc.InitSecurityHandler();
    Obj imported = doc.GetSDFDoc().ImportObj(my_dict, true);
    doc.GetRoot().Put("test_dict", imported);
    doc.Save(output_path + "annotation_test3.pdf", SDFDoc.SaveOptions.e_linearized);
}