Read CU attributes

Dori Bearham · **Posted:** Tue Nov 23, 2010 1:51 pm

I would like to be able to read the CU fields, like description, wms code, and unit of measure, for just a single CU. I'll have the CU Name and want to get the other attributes for this CU. I found IMMPersistInfo but not sure if I should be using that or how to implement it. Any help would be appreciated. Thanks :)

BillB · **Posted:** Tue Nov 23, 2010 4:52 pm

You might try using the MMDesignerUtils class, and the IMMDesignerUtils interface. That's probably the easiest way to get CUs, then you don't have to worry about deserializing them from a blob in the table. On the IMMDesignerUtils interface there is a "FindCU" method which has a number of optional parameters. I don't see a name property, but maybe you can get the list of CUs for a particular feature class, then iterate through the list that's returns. Or...maybe you can use the WMSCode?

Might that work?

Dori Bearham · **Posted:** Tue Nov 23, 2010 7:04 pm

The documentation says this interface allows me to search for specific objects on the CU tab. I won't have a design open when I'm looking for a specific CU. The CU will be selected in Favorites Manager. Can I still use that? The documentation is pretty non-informative.

BillB · **Posted:** Tue Nov 23, 2010 7:53 pm

Dori Bearham wrote:

The documentation says this interface allows me to search for specific objects on the CU tab. I won't have a design open when I'm looking for a specific CU. The CU will be selected in Favorites Manager. Can I still use that? The documentation is pretty non-informative.

The CU tab will populate once you start editing, no design required. Will that work? Actually, if you are talking ArcCatalog we might be back to loading it from the blob. :-(

Dori Bearham · **Posted:** Wed Nov 24, 2010 12:54 pm

Yeah, I'm talking ArcCatalog. What I'm trying to do is give the CU administrator the ability to update a CU in the WFM CU Library whenever they make a change in the Designer CUs (Favorites Manager). So I'm thinking I need to read the BLOB and then figure out how to decipher it.

BillB · **Posted:** Wed Nov 24, 2010 1:15 pm

Awhile back you were loading it to an XML, could modifying the XML be an option (then writing it back into storage)?

Dori Bearham · **Posted:** Wed Nov 24, 2010 3:55 pm

I was hoping to not have to use XML but I think that's the only way at this point. I'll create the XML (I know how to do that now) and then read the CU data from the XML. Thanks for your help! :)

BillB · **Posted:** Wed Nov 24, 2010 4:28 pm

Dori Bearham wrote:

I was hoping to not have to use XML but I think that's the only way at this point. I'll create the XML (I know how to do that now) and then read the CU data from the XML. Thanks for your help! :)

I think XML is probably the easiest way, but I'll see what I can dig up for reading from blob contents. :-)

BillB · **Posted:** Wed Nov 24, 2010 4:41 pm

Here is some vb6 code I dug up that we use on the Compatible Units tab. This should work in ArcCatalog too, you just need to get the workspace (GxSelectedObject)

Code:

 Dim pLI As ID8ListItem
 Dim pPLI As IMMPersistentListItem
 Dim pCuType As IMMCategory
 Dim pListItemEx As ID8ListItemEx

 Set pCuType = New D8CuType
 pCuType.Description = "Compatible Units"
 pCuType.Owner = cuoSystem
 pCuType.Type = cutCUCompatibleUnitCategory
 Set pLI = pCuType
 Set pPLI = pLI
 
 If pPLI.CanLoadFromDB(<your workspace>) Then
    pPLI.LoadFromDB "mmSystemCUs", <your workspace>
        pPLI.SetDirty False ' Set not dirty after load.
        Set pLI = pPLI
 End If
 
 Dim pList as ID8List
 Set pList = New D8List
 pList.AddFront pLi
 
 //now you have a list of compatible units, you can iterate this list and get each MMCompatibleUnit object
 //and query it for properties (Name, Description, etc). Attributes exist as ID8ListItem children on each MMCU 
 //object (ID8CuDefAttrib) which have name/value properties 
 //
 //Take the same code above and us IMMPersistentListItem to write it back to the database (e.g. Can SaveToDB, and SaveToDB)

Dori Bearham · **Posted:** Wed Nov 24, 2010 4:50 pm

Thank you! I almost had that but couldn't figure out what LoadFromDB returned. Aha, it's a list. I'll give that a try.

Schneider Electric GIS Tech Support

Read CU attributes