how to get document content using DFC in c#

c# documentum dfc
khalid khan picture khalid khan · Sep 8, 2012 · Viewed 7.1k times · Source

I have documentum developer edition 6.6. I want to get document content (read content into stream) using DFC in c#. I have used following C#.net code

IDfId id = collection.getId("r_object_id");
IDfDocument doc = (IDfDocument) session.getObject(id);

but it throws following exception.

Exception: Unable to cast COM object of type 'System.__ComObject' to interface type 'DFCLib.IDfDocument'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{EFAC2D68-175B-11D2-9927-006097C27C31}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

I also tried following method(it runs successfully) but i don't know how to read content into stream or memory stream.

IDfId id = collection.getId("r_object_id"); 
IDfSysObject sysObject = (IDfSysObject) session.getObject(id);

Answer

Brendan Hannemann picture Brendan Hannemann · Sep 18, 2012

This will dump the file to a local filesystem path:

IDfId id = collection.getId("r_object_id"); 
IDfSysObject sysObject = (IDfSysObject) session.getObject(id);

sysObject.getFile(<path>)

Then you can open the file as a stream using standard .Net IO libraries, for example:

var stream = new System.IO.StreamReader(<path>)

I believe the DFC has some stream-based public methods (getContent?) but I have not seen them used successfully from .Net. However, I will suggest that you take a look at the DFS (Documentum Foundation Services) API instead of DFC. This is the supported API now and DFC is deprecated as a public API. DFS does have stream options when dealing with repository content.

You may also want to check http://developer.emc.com if this answer is not sufficient for your needs.

Related questions

How do I generate a random int number?

How do I generate a random integer in C#?

Read More
Regular expression to check if password is "8 characters including 1 uppercase letter, 1 special character, alphanumeric characters"

I want a regular expression to check that a password must be eight characters including one uppercase letter, one special character and alphanumeric characters. And here is my validation expression which is for eight characters including one uppercase letter, one …

Read More
How to make an HTTP POST web request

Canonical How can I make an HTTP request and send some data using the POST method? I can do a GET request, but I have no idea of how to make a POST request.

Read More