Hi Eric,
We have analyzed your query,binding the data to be grabbed from Database.we have created a sample to meet your requirement, in that sample we have cleared default SymbolPalette Group and added one Custom SymbolPaletteGroup with 5 elements. If you drag drop the element from the CustomGroup, we are retrieving some persons data from DataBase and assigning that content into 'CustomClass' then we are giving that CustomClass as content of dropped element. Now, we have provided that CustomClass [Dropped element Content] to property grid it will show all the properties of that Custom object.
For more inforamtion please refer the attached sample.
Please let us know if you require further assistance on this.
Regards,
Nagalakshmi P.
SymbolPaletteItemFromDB_42b5ef16.zip