I am writing a stand-alone application in c# (using vs2010). I have ArcGis Desktop license.
I only need to insert a new data frame in an mxd file and save this mxd.

So: I create MxDocument coclass. Then get IMxDocument interface from that. Then i use its "Maps" property which return me IMaps interface. From that I call its method Add() to add a new dataframe.


Dim pDocClassOut As MxDocumentClas = New MxDocumentClass()
Dim appl As IApplication = TryCast(pDocClassOut.Parent, IApplication)
Dim mxDoc As IMxDocument = TryCast(appl.Document, IMxDocument)
Dim maps As IMaps = CType(mxDoc.Maps, IMaps)
Dim pMap1 As IMap = New MapClass
pMap1.Name = "XYZ"

appl.SaveAsDocument("E:\DEV EnGIS\Untitled.mxd")

Why this simple code doesn't work? Thank you so much!


If you are using ArcGIS Engine, then according to the help file this interface will not work because it is for desktop only

Have a look at this link:


If you are developing for desktop then try the create method.


What part isn't working?

Have you tried calling mxDoc.Open(pathToMXD) first?

I found a sample on the ArcGIS forums in Java, but the concept should be exactly the same in .Net.

  • Hi. Sorry for my late answer. Yes, i tried also mxDoc.Open(pathToMxd). Problem is that i get an error when i save the document (Generic error from COM).
    – diolo75
    Jul 24 '13 at 13:31
  • Sample you linked is for Add-in but I have a standalone application.
    – diolo75
    Jul 24 '13 at 13:44
  • This link is broken.
    – PolyGeo
    Mar 24 '20 at 21:32

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