Using DbLinq in IronPython

Question

I'm trying to use dblinq in my IronPython application but am having some problems getting started. When trying to import dblinq classes,using clr.AddReference() it does not seem to see dblinq.

I can build but not access the library

import clr
clr.AddReference("DbLinq")
clr.AddReference("System.Data.Linq")
from System.Data.Linq import DataContext

exit = raw_input("press any key to quit")

1: My dblinq source is in a subfolder called Resources

clr.AddReferenceToFileAndPath("Resources/DbLinq.dll") => file not found

clr.AddReference("DbLinq") => could not add reference to dblinq

clr.AddReferenceToFileAndPath("C:/Development/DBLinq2/Dblinq.dll" => success

but still cannot use the classes using from DbLinq import ...

Solution

    import clr

   clr.AddReferenceToFileAndPath("%s\Resources\DbLinq.dll" %os.getcwd())
    clr.AddReference("DbLinq")
    from Npgsql import *
    from DbLinq import Data

Answer 1

For libraries like DbLinq that come with dependencies or are split into several DLLs/modules you can programmatically add their location to allow the runtime to find all required files.

import sys
sys.path.append(r"C:\Temp\DbLinq-0.20.1")

You can then reference all required assemblies as usual:

clr.AddReference("DbLinq")

If there is one primary assembly you can also use clr.AddReferenceToFileAndPath (with an absolute path) which will implicitly add the referenced assemblies location to the path.

clr.AddReference(r"C:\Temp\DbLinq-0.20.1\DbLinq.dll")