Getting path to MXD using IDocumentInfo2

JeffreyHamblin

I need to get the path to the currently open map document for a C# Add-In.

While searching, I found several references that use essentially the following:

public string GetActiveDocumentPath(IApplication application)
{
    // The active document is always the last template
    ITemplates templates = application.Templates;
    return templates.get_Item(templates.Count - 1);
}  

called with:
string mxdPath = GetActiveDocumentPath(ArcMap.Application);

Then I found IDocumentInfo2.Path in the documentation, and it seems to work fine:

public string GetActiveDocumentPath(IMapDocument mapDocument)
{
    IDocumentInfo2 docInfo = mapDocument as IDocumentInfo2;
    return docInfo.Path;
}

called with:
string mxdPath = GetActiveDocumentFolder(ArcMap.Document as IMapDocument);

My question is if anyone knows of any reasons to use one versus the other.

JeffreyHamblin

Keith,

Thanks for the heads-up about dealing with a new unsaved document. As it turns out, it IS an issue and I probably wouldn't have caught it until much later in testing.

I am streaming some data into the MXD in an overridden OnSave method in an Add-In Extension. It is some extended setup information for an Add-In that includes path information which must be re-written to use relative paths before saving in the MXD (and expanded to absolute after being read). That's why I need the path to the MXD.

IDocumentInfo2.Folder was working fine in my initial tests. However, when saving  a new unsaved document, the Folder property is null (and the Path property is empty) -- even though OnSave occurs after the file save dialog. I suspect the properties are set AFTER the save completes.

Fortunately, The templates method of getting the path does work correctly in the first OnSave of a new document. So that's what I will be using.