Attachments Overrides existing while adding from VendorMaint graph - acumatica

Question

I am importing data and documents from third party application into Acumatica.
After importing, I am creating Vendor dynamically using below code along with attachments.
VendorMaint graph = PXGraph.CreateInstance<VendorMaint>();
VendorR row1 = null;
row1 = new VendorR();
row1.AcctName = VendorName;
row1.NoteID = noteid; // Existing - GUID created while importing
graph.BAccount.Update(row1);
If attachment already exists then it should update instead of duplicating.
In this case if Vendor already exists with files attached, then my code overrides these attachments and remove all previous files attached to that existing vendor.
I want to add the attachment instead of override the existing attachment. Any suggestion?

Answer 1

Try to use insert method of view:
VendorMaint graph = PXGraph.CreateInstance<VendorMaint>();
var row1 = new VendorR();
row1 = graph.BAccount.Insert(row1);
if (row1 == null) // already inserted or wasn't able to insert
{
//some logic with newly created vendor
}
else
{
//some logic with existed
}
row1.AcctName = "vendor name";
row1.NoteID = noteid; // Existing - GUID created while importing
graph.BAccount.Update(row1);

Answer 2

I have found the solution for the issue. Below code helps to create a new attachment and does not override any existing attachments for an existing Vendor.
// Getting the FileID of the attached file from DACClass
UploadFile uf = PXSelectJoin<UploadFile,
InnerJoin<NoteDoc, On<NoteDoc.fileID, Equal<UploadFile.fileID>>,
InnerJoin<DACClass, On<DACClass.noteID, Equal<NoteDoc.noteID>>>>,
Where<DACClass.noteID, Equal<Required<DACClass.noteID>>>>.Select(this, noteid);
if (uf != null)
{
PXNoteAttribute.SetFileNotes(graph.BAccount.Cache, graph.BAccount.Current, uf.FileID.Value);
NoteDoc doc = new NoteDoc();
doc.NoteID = uf.FileID.Value;
doc.FileID = new Guid();
graph.BAccount.Cache.Insert(doc);
}